Skip to content
Fencer Intel
critical 9.8

CVE-2026-63887 in the critical feed json

scsi: target: iscsi: Bound iscsi_encode_text_output() appends to rsp_buf

published 3mo ago modified 20d ago also EUVD-2026-45660

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: Bound iscsi_encode_text_output() appends to rsp_buf

iscsi_encode_text_output() concatenates "key=value\0" records into login->rsp_buf, an 8192-byte kzalloc(MAX_KEY_VALUE_PAIRS) buffer allocated in iscsit_alloc_login_setup_buffer(). The three sprintf() call sites in this function (lines 1398, 1411, 1424 in v7.1-rc2) never check the remaining buffer capacity:

*length += sprintf(output_buf, "%s=%s", er->key, er->value); *length += 1; output_buf = textbuf + *length;

The 8192-byte ceiling at iscsi_target_check_login_request() bounds the *input* Login PDU payload, but a single PDU can carry up to 2048 minimal four-byte "a=b\0" pairs, each unknown key expanding to a 16-byte "a=NotUnderstood\0" output record via iscsi_add_notunderstood_response(). 2048 * 16 = 32 KiB of output into an 8 KiB buffer, producing a ~24 KiB heap overrun in the kmalloc-8k slab.

The fix introduces a static iscsi_encode_text_record() helper that uses snprintf() with a per-call bounds check against the remaining buffer, and threads a u32 textbuf_size parameter through iscsi_encode_text_output(). Both call sites in iscsi_target_handle_csg_zero() (PHASE_SECURITY) and iscsi_target_handle_csg_one() (PHASE_OPERATIONAL) pass MAX_KEY_VALUE_PAIRS. On overflow the encoder logs the condition, calls iscsi_release_extra_responses() to drop queued records, and returns -1; both caller sites now emit ISCSI_STATUS_CLS_INITIATOR_ERR / ISCSI_LOGIN_STATUS_INIT_ERR via iscsit_tx_login_rsp() before returning, so the initiator sees an explicit failed-login response rather than a silent connection drop. (Prior to this patch only the PHASE_OPERATIONAL caller did that; the PHASE_SECURITY caller is converted to the same shape.)

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-2026-63887

  • 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-2026-63887

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 9 5.14.0-687.44.1.el9_8
  • rv RHEL 9 5.14.0-687.44.1.el9_8
  • perf RHEL 9 5.14.0-687.44.1.el9_8
  • rtla RHEL 9 5.14.0-687.44.1.el9_8
  • libperf RHEL 9 5.14.0-687.44.1.el9_8
  • kernel-rt RHEL 9 5.14.0-687.44.1.el9_8
  • kernel-64k RHEL 9 5.14.0-687.44.1.el9_8
  • kernel-core RHEL 9 5.14.0-687.44.1.el9_8

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

  • kernel-livepatch-SLE16_Update_10 SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 9-160000.1.1
  • kernel-livepatch-SLE16_Update_1 SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 18-160000.1.1
  • kernel-livepatch-SLE16_Update_5 SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 13-160000.1.1
  • kernel-livepatch-SLE16_Update_8 SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 10-160000.1.1
  • kernel-livepatch-SLE16_Update_11 SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 9-160000.1.1
  • kernel-livepatch-SLE16_Update_0 SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 20-160000.4.3
  • kernel-livepatch-SLE16_Update_2 SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 16-160000.1.1
  • kernel-livepatch-SLE16_Update_6 SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 12-160000.1.1

suse advisories SUSE-SU-2026:24431-1SUSE-SU-2026:24455-1SUSE-SU-2026:24434-1SUSE-SU-2026:24458-1SUSE-SU-2026:24433-1SUSE-SU-2026:24457-1

  • 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 9 5.14.0-687.44.1.el9_8
  • rv AlmaLinux 9 5.14.0-687.44.1.el9_8
  • perf AlmaLinux 9 5.14.0-687.44.1.el9_8
  • rtla AlmaLinux 9 5.14.0-687.44.1.el9_8
  • libperf AlmaLinux 9 5.14.0-687.44.1.el9_8
  • kernel-rt AlmaLinux 9 5.14.0-687.44.1.el9_8
  • kernel-64k AlmaLinux 9 5.14.0-687.44.1.el9_8
  • kernel-core AlmaLinux 9 5.14.0-687.44.1.el9_8

almalinux advisories ALSA-2026:63129ALSA-2026:57253ALSA-2026:57254ALSA-2026:54343

  • kernel Rocky Linux 9 5.14.0-687.44.1.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
  • kernel Rocky Linux 10 6.12.0-211.47.1.el10_2

rocky linux advisories RLSA-2026:63129RLSA-2026:57254RLSA-2026:57253RLSA-2026:54343

Is CVE-2026-63887 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

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-2026-63887 updated cvss 7.0

kernel: scsi: target: iscsi: Bound iscsi_encode_text_output() appends to rsp_buf

  • 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 5.14.0-687.44.1.el9_8, perf 5.14.0-687.44.1.el9_8, rtla 5.14.0-687.44.1.el9_8, python3-perf 5.14.0-687.44.1.el9_8, kernel-devel-matched 5.14.0-687.44.1.el9_8, kernel-64k-devel-matched 5.14.0-687.44.1.el9_8, +7 more
    fixed: vendor fix RHSA-2026:63129
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-211.47.1.el10_2, perf 6.12.0-211.47.1.el10_2, rtla 6.12.0-211.47.1.el10_2, python3-perf 6.12.0-211.47.1.el10_2, kernel-devel-matched 6.12.0-211.47.1.el10_2, kernel-64k-devel-matched 6.12.0-211.47.1.el10_2, +7 more
    fixed: vendor fix RHSA-2026:54343
  • 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 30 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 5.14.0-687.44.1.el9_8, kernel-64k 5.14.0-687.44.1.el9_8, kernel-core 5.14.0-687.44.1.el9_8, kernel-tools 5.14.0-687.44.1.el9_8, kernel-modules 5.14.0-687.44.1.el9_8, kernel-64k-core 5.14.0-687.44.1.el9_8, +27 more
    fixed: vendor fix RHSA-2026:63129
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-211.47.1.el10_2, kernel-64k 6.12.0-211.47.1.el10_2, kernel-core 6.12.0-211.47.1.el10_2, kernel-tools 6.12.0-211.47.1.el10_2, kernel-modules 6.12.0-211.47.1.el10_2, kernel-64k-core 6.12.0-211.47.1.el10_2, +28 more
    fixed: vendor fix RHSA-2026:54343
  • 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 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 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 5.14.0-687.44.1.el9_8, kernel-debuginfo-common-s390x 5.14.0-687.44.1.el9_8, kernel-debuginfo-common-x86_64 5.14.0-687.44.1.el9_8, kernel-debuginfo-common-aarch64 5.14.0-687.44.1.el9_8, kernel-debuginfo-common-ppc64le 5.14.0-687.44.1.el9_8
    fixed: vendor fix RHSA-2026:63129
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-211.47.1.el10_2, kernel-debuginfo-common-s390x 6.12.0-211.47.1.el10_2, kernel-debuginfo-common-x86_64 6.12.0-211.47.1.el10_2, kernel-debuginfo-common-aarch64 6.12.0-211.47.1.el10_2, kernel-debuginfo-common-ppc64le 6.12.0-211.47.1.el10_2
    fixed: vendor fix RHSA-2026:54343
  • 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 5.14.0-687.44.1.el9_8, kernel-rt-64k 5.14.0-687.44.1.el9_8, kernel-rt-core 5.14.0-687.44.1.el9_8, kernel-rt-modules 5.14.0-687.44.1.el9_8, kernel-rt-64k-core 5.14.0-687.44.1.el9_8, kernel-rt-debug-core 5.14.0-687.44.1.el9_8, +14 more
    fixed: vendor fix RHSA-2026:63129
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-211.47.1.el10_2, kernel-rt-64k 6.12.0-211.47.1.el10_2, kernel-rt-core 6.12.0-211.47.1.el10_2, kernel-rt-modules 6.12.0-211.47.1.el10_2, kernel-rt-64k-core 6.12.0-211.47.1.el10_2, kernel-rt-debug-core 6.12.0-211.47.1.el10_2, +14 more
    fixed: vendor fix RHSA-2026:54343
  • 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 5.14.0-687.44.1.el9_8, kernel-rt-core 5.14.0-687.44.1.el9_8, kernel-rt-modules 5.14.0-687.44.1.el9_8, kernel-rt-debug-core 5.14.0-687.44.1.el9_8, kernel-rt-modules-core 5.14.0-687.44.1.el9_8, kernel-rt-debug-modules 5.14.0-687.44.1.el9_8, +4 more
    fixed: vendor fix RHSA-2026:63129
  • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-211.47.1.el10_2, kernel-rt-core 6.12.0-211.47.1.el10_2, kernel-rt-modules 6.12.0-211.47.1.el10_2, kernel-rt-debug-core 6.12.0-211.47.1.el10_2, kernel-rt-modules-core 6.12.0-211.47.1.el10_2, kernel-rt-debug-modules 6.12.0-211.47.1.el10_2, +4 more
    fixed: vendor fix RHSA-2026:54343
  • 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
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more
    not affected: vulnerable code not present

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
  • CWE-122 Heap-based Buffer Overflow
  • CWE-120 Buffer Copy without Checking Size of Input
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.