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critical 9.8

CVE-2026-63888 in the critical feed json

scsi: target: iscsi: Fix CRC overread and double-free in iscsit_handle_text_cmd()

published 3mo ago modified 16d ago also EUVD-2026-45661

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 56%
public exploits
0
none known

Summary

In the Linux kernel, the following vulnerability has been resolved:

scsi: target: iscsi: Fix CRC overread and double-free in iscsit_handle_text_cmd()

Two latent bugs in the Text-phase handler, both present since the original LIO integration in commit e48354ce078c ("iscsi-target: Add iSCSI fabric support for target v4.1"):

1) DataDigest CRC buffer overread (4 bytes past text_in).

text_in is kzalloc()'d at ALIGN(payload_length, 4). rx_size is then incremented by ISCSI_CRC_LEN to make room for the received DataDigest in the iovec, but the same (now-bumped) rx_size is passed as the buffer length to iscsit_crc_buf():

if (conn->conn_ops->DataDigest) { ... rx_size += ISCSI_CRC_LEN; } ... if (conn->conn_ops->DataDigest) { data_crc = iscsit_crc_buf(text_in, rx_size, 0, NULL);

iscsit_crc_buf() walks rx_size bytes of text_in with crc32c(), so when DataDigest is negotiated it reads 4 bytes past the end of the text_in allocation. KASAN reproduces this directly on the unpatched mainline tree as slab-out-of-bounds in crc32c() called from the Text PDU path. The OOB bytes feed crc32c() and are then compared against the initiator-supplied checksum, so the value does not flow back to the attacker, but the kernel does read past the buffer on every Text PDU with DataDigest=CRC32C.

Fix by passing the actual padded payload length (ALIGN(payload_length, 4)) that was used for the kzalloc().

2) Stale cmd->text_in_ptr re-free (double-free) on ERL>0 bad DataDigest drop.

On DataDigest mismatch with ErrorRecoveryLevel > 0 the handler silently drops the PDU and lets the initiator plug the CmdSN gap:

kfree(text_in); return 0;

cmd->text_in_ptr still points at the freed buffer. The next Text Request on the same ITT re-enters iscsit_setup_text_cmd(), which unconditionally does

kfree(cmd->text_in_ptr); cmd->text_in_ptr = NULL;

freeing the same pointer a second time. Session teardown via iscsit_release_cmd() has the same shape and hits the same double-free if the connection is dropped before a second Text Request arrives.

On an unmodified mainline tree the bug-1 CRC overread fires first on the initial valid Text Request and perturbs the subsequent state, so #4 was isolated by building a kernel with only the bug-1 hunk of this patch applied plus temporary printk() observability around the three relevant kfree() sites. The observability prints are not part of this patch. On that build, a three-PDU Text Request sequence after login produces two back-to-back splats:

BUG: KASAN: double-free in iscsit_setup_text_cmd+0x?? BUG: KASAN: double-free in iscsit_release_cmd+0x??

showing the same pointer freed in the ERL>0 drop path and again in iscsit_setup_text_cmd() (next Text Request on the same ITT) and once more in iscsit_release_cmd() (session teardown). On distro kernels with CONFIG_SLAB_FREELIST_HARDENED=y (default) the double-free becomes a remote kernel BUG(); on non-hardened kernels it corrupts the slab freelist.

Fix by clearing cmd->text_in_ptr after the kfree() in the ERL>0 drop path. With both hunks applied #4 is directly observable on the stock tree without observability printks; fixing bug-1 alone would mask #4 less, not more, so the hunks are submitted together.

Both fixes are one-liners. The Text PDU state machine is unchanged and the wire protocol is unaffected.

Patch / fix

  • Linux Linux 5.10.259, 5.15.210, 6.1.176, 6.6.143, 6.12.93, 6.18.35, 7.0.12, 7.1
  • linux Debian 12 6.1.176-1
  • linux Debian 13 6.12.94-1
  • linux Debian 14 7.0.12-1

debian advisories DEBIAN-CVE-2026-63888

  • linux Ubuntu 22.04 LTS 5.15.0-194.204
  • linux Ubuntu 24.04 LTS 6.8.0-142.142
  • linux Ubuntu 26.04 LTS 7.0.0-28.28
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1116.123
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1065.68
  • linux-aws Ubuntu 26.04 LTS 7.0.0-1009.9
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1117.127
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1069.77

ubuntu advisories UBUNTU-CVE-2026-63888

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel RHEL 8 4.18.0-553.157.1.el8_10
  • perf RHEL 8 4.18.0-553.157.1.el8_10
  • bpftool RHEL 8 4.18.0-553.157.1.el8_10
  • kernel-core RHEL 8 4.18.0-553.157.1.el8_10
  • kernel-tools RHEL 8 4.18.0-553.157.1.el8_10
  • python3-perf RHEL 8 4.18.0-553.157.1.el8_10
  • kernel-modules RHEL 8 4.18.0-553.157.1.el8_10
  • kernel-zfcpdump RHEL 8 4.18.0-553.157.1.el8_10

red hat advisories RHSA-2026:70482RHSA-2026:70483RHSA-2026:69874RHSA-2026:69837RHSA-2026:69089RHSA-2026:68100

  • kernel-64kb SLES 15 SP5-LTSS, SLE High Performance Computing 15 SP5-LTSS, SLE High Performance Computing 15 SP5-ESPOS 5.14.21-150500.55.189.1
  • kernel-syms SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE High Performance Computing 15 SP5-LTSS +1 more 5.14.21-150500.55.189.1
  • kernel-source SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE Micro 5.5 +2 more 5.14.21-150500.55.189.1
  • kernel-default SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE Micro 5.5 +3 more 5.14.21-150500.55.189.1
  • kernel-obs-build SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE High Performance Computing 15 SP5-LTSS +1 more 5.14.21-150500.55.189.1
  • kernel-default-base SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE Micro 5.5 +2 more 5.14.21-150500.55.189.1.150500.6.87.4
  • kernel-64kb SLE Module for Basesystem 15 SP7 6.4.0-150700.53.81.1
  • kernel-syms SLE Module for Development Tools 15 SP7 6.4.0-150700.53.81.1

suse advisories SUSE-SU-2026:4595-1SUSE-SU-2026:4586-1SUSE-SU-2026:4254-1SUSE-SU-2026:4570-1SUSE-SU-2026:4561-1SUSE-SU-2026:4559-1

  • kernel-rt openSUSE Leap 16.0 6.12.0-160000.38.1
  • dtb-aarch64 openSUSE Leap 16.0 6.12.0-160000.38.1
  • kernel-64kb openSUSE Leap 16.0 6.12.0-160000.38.1
  • kernel-syms openSUSE Leap 16.0 6.12.0-160000.38.1
  • kernel-azure openSUSE Leap 16.0 6.12.0-160000.38.1
  • kernel-obs-qa openSUSE Leap 16.0 6.12.0-160000.38.1
  • kernel-source openSUSE Leap 16.0 6.12.0-160000.38.1
  • kernel-default openSUSE Leap 16.0 6.12.0-160000.38.1

opensuse advisories openSUSE-SU-2026:21910-1

  • kernel AlmaLinux 10 6.12.0-211.49.1.el10_2
  • rv AlmaLinux 10 6.12.0-211.49.1.el10_2
  • perf AlmaLinux 10 6.12.0-211.49.1.el10_2
  • rtla AlmaLinux 10 6.12.0-211.49.1.el10_2
  • libperf AlmaLinux 10 6.12.0-211.49.1.el10_2
  • kernel-rt AlmaLinux 10 6.12.0-211.49.1.el10_2
  • kernel-64k AlmaLinux 10 6.12.0-211.49.1.el10_2
  • kernel-core AlmaLinux 10 6.12.0-211.49.1.el10_2

almalinux advisories ALSA-2026:57251ALSA-2026:57252ALSA-2026:57253ALSA-2026:57254

  • kernel Rocky Linux 10 6.12.0-211.49.1.el10_2
  • kernel Rocky Linux 9 5.14.0-687.41.1.el9_8
  • kernel-rt Rocky Linux 8 4.18.0-553.157.1.rt7.498.el8_10
  • kernel Rocky Linux 8 4.18.0-553.157.1.el8_10

rocky linux advisories RLSA-2026:57251RLSA-2026:57252RLSA-2026:57254RLSA-2026:57253

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-63888 updated cvss 7.0

kernel: scsi: target: iscsi: Fix CRC overread and double-free in iscsit_handle_text_cmd()

  • Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux 9 kernel-rt, kernel-rt-kvm, kernel-rt-core, kernel-rt-modules, kernel-rt-debug-kvm, kernel-rt-debug-core, +12 more
    affected: no fix available
  • Red Hat CodeReady Linux Builder EUS (v.9.6) libperf 5.14.0-570.141.1.el9_6, kernel-debuginfo-common-s390x 5.14.0-570.141.1.el9_6, kernel-debuginfo-common-x86_64 5.14.0-570.141.1.el9_6, kernel-debuginfo-common-aarch64 5.14.0-570.141.1.el9_6, kernel-debuginfo-common-ppc64le 5.14.0-570.141.1.el9_6
    fixed: vendor fix RHSA-2026:67720
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-687.41.1.el9_8, perf 5.14.0-687.41.1.el9_8, rtla 5.14.0-687.41.1.el9_8, python3-perf 5.14.0-687.41.1.el9_8, kernel-devel-matched 5.14.0-687.41.1.el9_8, kernel-64k-devel-matched 5.14.0-687.41.1.el9_8, +7 more
    fixed: vendor fix RHSA-2026:57252
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-211.49.1.el10_2, perf 6.12.0-211.49.1.el10_2, rtla 6.12.0-211.49.1.el10_2, python3-perf 6.12.0-211.49.1.el10_2, kernel-devel-matched 6.12.0-211.49.1.el10_2, kernel-64k-devel-matched 6.12.0-211.49.1.el10_2, +7 more
    fixed: vendor fix RHSA-2026:57251
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) perf 5.14.0-284.193.1.el9_2, rtla 5.14.0-284.193.1.el9_2, kernel-devel-matched 5.14.0-284.193.1.el9_2, kernel-64k-devel-matched 5.14.0-284.193.1.el9_2, kernel-debug-devel-matched 5.14.0-284.193.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.193.1.el9_2, +5 more
    fixed: vendor fix RHSA-2026:70482
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) rv 5.14.0-427.150.1.el9_4, perf 5.14.0-427.150.1.el9_4, rtla 5.14.0-427.150.1.el9_4, kernel-devel-matched 5.14.0-427.150.1.el9_4, kernel-64k-devel-matched 5.14.0-427.150.1.el9_4, kernel-debug-devel-matched 5.14.0-427.150.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:68100
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) rv 6.12.0-55.105.1.el10_0, perf 6.12.0-55.105.1.el10_0, rtla 6.12.0-55.105.1.el10_0, python3-perf 6.12.0-55.105.1.el10_0, kernel-devel-matched 6.12.0-55.105.1.el10_0, kernel-64k-devel-matched 6.12.0-55.105.1.el10_0, +7 more
    fixed: vendor fix RHSA-2026:69089
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) rv 5.14.0-570.141.1.el9_6, perf 5.14.0-570.141.1.el9_6, rtla 5.14.0-570.141.1.el9_6, python3-perf 5.14.0-570.141.1.el9_6, kernel-devel-matched 5.14.0-570.141.1.el9_6, kernel-64k-devel-matched 5.14.0-570.141.1.el9_6, +7 more
    fixed: vendor fix RHSA-2026:67720
show 31 more
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.157.1.el8_10, kernel 4.18.0-553.157.1.el8_10, bpftool 4.18.0-553.157.1.el8_10, kernel-core 4.18.0-553.157.1.el8_10, kernel-tools 4.18.0-553.157.1.el8_10, python3-perf 4.18.0-553.157.1.el8_10, +15 more
    fixed: vendor fix RHSA-2026:57253
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-687.41.1.el9_8, kernel-64k 5.14.0-687.41.1.el9_8, kernel-core 5.14.0-687.41.1.el9_8, kernel-tools 5.14.0-687.41.1.el9_8, kernel-modules 5.14.0-687.41.1.el9_8, kernel-64k-core 5.14.0-687.41.1.el9_8, +27 more
    fixed: vendor fix RHSA-2026:57252
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-211.49.1.el10_2, kernel-64k 6.12.0-211.49.1.el10_2, kernel-core 6.12.0-211.49.1.el10_2, kernel-tools 6.12.0-211.49.1.el10_2, kernel-modules 6.12.0-211.49.1.el10_2, kernel-64k-core 6.12.0-211.49.1.el10_2, +28 more
    fixed: vendor fix RHSA-2026:57251
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) perf 4.18.0-305.208.1.el8_4, kernel 4.18.0-305.208.1.el8_4, bpftool 4.18.0-305.208.1.el8_4, kernel-core 4.18.0-305.208.1.el8_4, kernel-tools 4.18.0-305.208.1.el8_4, python3-perf 4.18.0-305.208.1.el8_4, +8 more
    fixed: vendor fix RHSA-2026:69874
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) perf 4.18.0-372.208.1.el8_6, kernel 4.18.0-372.208.1.el8_6, bpftool 4.18.0-372.208.1.el8_6, kernel-core 4.18.0-372.208.1.el8_6, kernel-tools 4.18.0-372.208.1.el8_6, python3-perf 4.18.0-372.208.1.el8_6, +8 more
    fixed: vendor fix RHSA-2026:59473
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) perf 4.18.0-477.168.1.el8_8, kernel 4.18.0-477.168.1.el8_8, bpftool 4.18.0-477.168.1.el8_8, kernel-core 4.18.0-477.168.1.el8_8, kernel-tools 4.18.0-477.168.1.el8_8, python3-perf 4.18.0-477.168.1.el8_8, +9 more
    fixed: vendor fix RHSA-2026:69837
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool 7.0.0-284.193.1.el9_2, kernel 5.14.0-284.193.1.el9_2, kernel-64k 5.14.0-284.193.1.el9_2, kernel-core 5.14.0-284.193.1.el9_2, kernel-tools 5.14.0-284.193.1.el9_2, python3-perf 5.14.0-284.193.1.el9_2, +28 more
    fixed: vendor fix RHSA-2026:70482
  • Red Hat Enterprise Linux BaseOS E4S (v.9.4) bpftool 7.3.0-427.150.1.el9_4, kernel 5.14.0-427.150.1.el9_4, kernel-64k 5.14.0-427.150.1.el9_4, kernel-core 5.14.0-427.150.1.el9_4, kernel-tools 5.14.0-427.150.1.el9_4, python3-perf 5.14.0-427.150.1.el9_4, +28 more
    fixed: vendor fix RHSA-2026:68100
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel 6.12.0-55.105.1.el10_0, kernel-64k 6.12.0-55.105.1.el10_0, kernel-core 6.12.0-55.105.1.el10_0, kernel-tools 6.12.0-55.105.1.el10_0, kernel-modules 6.12.0-55.105.1.el10_0, kernel-64k-core 6.12.0-55.105.1.el10_0, +27 more
    fixed: vendor fix RHSA-2026:69089
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel 5.14.0-570.141.1.el9_6, kernel-64k 5.14.0-570.141.1.el9_6, kernel-core 5.14.0-570.141.1.el9_6, kernel-tools 5.14.0-570.141.1.el9_6, kernel-modules 5.14.0-570.141.1.el9_6, kernel-64k-core 5.14.0-570.141.1.el9_6, +27 more
    fixed: vendor fix RHSA-2026:67720
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) perf 4.18.0-305.208.1.el8_4, kernel 4.18.0-305.208.1.el8_4, bpftool 4.18.0-305.208.1.el8_4, kernel-core 4.18.0-305.208.1.el8_4, kernel-tools 4.18.0-305.208.1.el8_4, python3-perf 4.18.0-305.208.1.el8_4, +15 more
    fixed: vendor fix RHSA-2026:69874
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) perf 4.18.0-372.208.1.el8_6, kernel 4.18.0-372.208.1.el8_6, bpftool 4.18.0-372.208.1.el8_6, kernel-core 4.18.0-372.208.1.el8_6, kernel-tools 4.18.0-372.208.1.el8_6, python3-perf 4.18.0-372.208.1.el8_6, +8 more
    fixed: vendor fix RHSA-2026:59473
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8) perf 4.18.0-477.168.1.el8_8, kernel 4.18.0-477.168.1.el8_8, bpftool 4.18.0-477.168.1.el8_8, kernel-core 4.18.0-477.168.1.el8_8, kernel-tools 4.18.0-477.168.1.el8_8, python3-perf 4.18.0-477.168.1.el8_8, +8 more
    fixed: vendor fix RHSA-2026:69837
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-687.41.1.el9_8, kernel-debuginfo-common-s390x 5.14.0-687.41.1.el9_8, kernel-debuginfo-common-x86_64 5.14.0-687.41.1.el9_8, kernel-debuginfo-common-aarch64 5.14.0-687.41.1.el9_8, kernel-debuginfo-common-ppc64le 5.14.0-687.41.1.el9_8
    fixed: vendor fix RHSA-2026:57252
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-211.49.1.el10_2, kernel-debuginfo-common-s390x 6.12.0-211.49.1.el10_2, kernel-debuginfo-common-x86_64 6.12.0-211.49.1.el10_2, kernel-debuginfo-common-aarch64 6.12.0-211.49.1.el10_2, kernel-debuginfo-common-ppc64le 6.12.0-211.49.1.el10_2
    fixed: vendor fix RHSA-2026:57251
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) libperf 6.12.0-55.105.1.el10_0, kernel-debuginfo-common-s390x 6.12.0-55.105.1.el10_0, kernel-debuginfo-common-x86_64 6.12.0-55.105.1.el10_0, kernel-debuginfo-common-aarch64 6.12.0-55.105.1.el10_0, kernel-debuginfo-common-ppc64le 6.12.0-55.105.1.el10_0
    fixed: vendor fix RHSA-2026:69089
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.157.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.157.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.157.1.el8_10
    fixed: vendor fix RHSA-2026:57253
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.157.1.rt7.498.el8_10, kernel-rt-kvm 4.18.0-553.157.1.rt7.498.el8_10, kernel-rt-core 4.18.0-553.157.1.rt7.498.el8_10, kernel-rt-modules 4.18.0-553.157.1.rt7.498.el8_10, kernel-rt-debug-kvm 4.18.0-553.157.1.rt7.498.el8_10, kernel-rt-debug-core 4.18.0-553.157.1.rt7.498.el8_10, +4 more
    fixed: vendor fix RHSA-2026:57254
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-687.41.1.el9_8, kernel-rt-64k 5.14.0-687.41.1.el9_8, kernel-rt-core 5.14.0-687.41.1.el9_8, kernel-rt-modules 5.14.0-687.41.1.el9_8, kernel-rt-64k-core 5.14.0-687.41.1.el9_8, kernel-rt-debug-core 5.14.0-687.41.1.el9_8, +14 more
    fixed: vendor fix RHSA-2026:57252
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-211.49.1.el10_2, kernel-rt-64k 6.12.0-211.49.1.el10_2, kernel-rt-core 6.12.0-211.49.1.el10_2, kernel-rt-modules 6.12.0-211.49.1.el10_2, kernel-rt-64k-core 6.12.0-211.49.1.el10_2, kernel-rt-debug-core 6.12.0-211.49.1.el10_2, +14 more
    fixed: vendor fix RHSA-2026:57251
  • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt 5.14.0-284.193.1.rt14.478.el9_2, kernel-rt-core 5.14.0-284.193.1.rt14.478.el9_2, kernel-rt-modules 5.14.0-284.193.1.rt14.478.el9_2, kernel-rt-debug-core 5.14.0-284.193.1.rt14.478.el9_2, kernel-rt-modules-core 5.14.0-284.193.1.rt14.478.el9_2, kernel-rt-debug-modules 5.14.0-284.193.1.rt14.478.el9_2, +4 more
    fixed: vendor fix RHSA-2026:70483
  • Red Hat Enterprise Linux Real Time E4S (v.9.4) kernel-rt 5.14.0-427.150.1.el9_4, kernel-rt-core 5.14.0-427.150.1.el9_4, kernel-rt-modules 5.14.0-427.150.1.el9_4, kernel-rt-debug-core 5.14.0-427.150.1.el9_4, kernel-rt-modules-core 5.14.0-427.150.1.el9_4, kernel-rt-debug-modules 5.14.0-427.150.1.el9_4, +4 more
    fixed: vendor fix RHSA-2026:68100
  • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt 6.12.0-55.105.1.el10_0, kernel-rt-64k 6.12.0-55.105.1.el10_0, kernel-rt-core 6.12.0-55.105.1.el10_0, kernel-rt-modules 6.12.0-55.105.1.el10_0, kernel-rt-64k-core 6.12.0-55.105.1.el10_0, kernel-rt-debug-core 6.12.0-55.105.1.el10_0, +14 more
    fixed: vendor fix RHSA-2026:69089
  • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt 5.14.0-570.141.1.el9_6, kernel-rt-64k 5.14.0-570.141.1.el9_6, kernel-rt-core 5.14.0-570.141.1.el9_6, kernel-rt-modules 5.14.0-570.141.1.el9_6, kernel-rt-64k-core 5.14.0-570.141.1.el9_6, kernel-rt-debug-core 5.14.0-570.141.1.el9_6, +14 more
    fixed: vendor fix RHSA-2026:67720
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-687.41.1.el9_8, kernel-rt-core 5.14.0-687.41.1.el9_8, kernel-rt-modules 5.14.0-687.41.1.el9_8, kernel-rt-debug-core 5.14.0-687.41.1.el9_8, kernel-rt-modules-core 5.14.0-687.41.1.el9_8, kernel-rt-debug-modules 5.14.0-687.41.1.el9_8, +4 more
    fixed: vendor fix RHSA-2026:57252
  • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-211.49.1.el10_2, kernel-rt-core 6.12.0-211.49.1.el10_2, kernel-rt-modules 6.12.0-211.49.1.el10_2, kernel-rt-debug-core 6.12.0-211.49.1.el10_2, kernel-rt-modules-core 6.12.0-211.49.1.el10_2, kernel-rt-debug-modules 6.12.0-211.49.1.el10_2, +4 more
    fixed: vendor fix RHSA-2026:57251
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt 5.14.0-284.193.1.rt14.478.el9_2, kernel-rt-kvm 5.14.0-284.193.1.rt14.478.el9_2, kernel-rt-core 5.14.0-284.193.1.rt14.478.el9_2, kernel-rt-modules 5.14.0-284.193.1.rt14.478.el9_2, kernel-rt-debug-kvm 5.14.0-284.193.1.rt14.478.el9_2, kernel-rt-debug-core 5.14.0-284.193.1.rt14.478.el9_2, +6 more
    fixed: vendor fix RHSA-2026:70483
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4) kernel-rt 5.14.0-427.150.1.el9_4, kernel-rt-kvm 5.14.0-427.150.1.el9_4, kernel-rt-core 5.14.0-427.150.1.el9_4, kernel-rt-modules 5.14.0-427.150.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.150.1.el9_4, kernel-rt-debug-core 5.14.0-427.150.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:68100
  • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt 6.12.0-55.105.1.el10_0, kernel-rt-kvm 6.12.0-55.105.1.el10_0, kernel-rt-core 6.12.0-55.105.1.el10_0, kernel-rt-modules 6.12.0-55.105.1.el10_0, kernel-rt-debug-kvm 6.12.0-55.105.1.el10_0, kernel-rt-debug-core 6.12.0-55.105.1.el10_0, +6 more
    fixed: vendor fix RHSA-2026:69089
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt 5.14.0-570.141.1.el9_6, kernel-rt-kvm 5.14.0-570.141.1.el9_6, kernel-rt-core 5.14.0-570.141.1.el9_6, kernel-rt-modules 5.14.0-570.141.1.el9_6, kernel-rt-debug-kvm 5.14.0-570.141.1.el9_6, kernel-rt-debug-core 5.14.0-570.141.1.el9_6, +6 more
    fixed: vendor fix RHSA-2026:67720
  • Red Hat Enterprise Linux RT (v. 8) kernel-rt 4.18.0-553.157.1.rt7.498.el8_10, kernel-rt-core 4.18.0-553.157.1.rt7.498.el8_10, kernel-rt-modules 4.18.0-553.157.1.rt7.498.el8_10, kernel-rt-debug-core 4.18.0-553.157.1.rt7.498.el8_10, kernel-rt-debug-modules 4.18.0-553.157.1.rt7.498.el8_10, kernel-rt-modules-extra 4.18.0-553.157.1.rt7.498.el8_10, +2 more
    fixed: vendor fix RHSA-2026:57254

1 more not affected in the full advisory

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
26d ago

Exploit prediction

0.78% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Linux Linux

Classification

Weakness
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.