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CVE-2026-98725 json

nvmet-auth: fix out-of-bounds write in nvmet_auth_challenge()

published 24d ago modified 12d ago also EUVD-2026-103810

cvss
—
not scored
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 11%
public exploits
0
none known

Summary

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

nvmet-auth: fix out-of-bounds write in nvmet_auth_challenge()

nvmet_auth_challenge() receives its output buffer as a void pointer. sizeof(*d) therefore evaluates to one with GCC and undercounts the fixed challenge header by 15 bytes. A short AUTH_RECEIVE buffer can pass the check before the challenge is copied past the end of its allocation.

Use the typed challenge pointer when calculating the response size.

BUG: KASAN: slab-out-of-bounds in nvmet_execute_auth_receive (drivers/nvme/target/fabrics-cmd-auth.c:442 drivers/nvme/target/fabrics-cmd-auth.c:569) Write of size 32 by task kworker/1:1H/64 Workqueue: nvmet_tcp_wq nvmet_tcp_io_work Call Trace: nvmet_execute_auth_receive (drivers/nvme/target/fabrics-cmd-auth.c:442 drivers/nvme/target/fabrics-cmd-auth.c:569) nvmet_tcp_try_recv_pdu (drivers/nvme/target/tcp.c:1119 drivers/nvme/target/tcp.c:1243) nvmet_tcp_io_work (drivers/nvme/target/tcp.c:1350 drivers/nvme/target/tcp.c:1382 drivers/nvme/target/tcp.c:1445) process_one_work (kernel/workqueue.c:3322) worker_thread (kernel/workqueue.c:3405 kernel/workqueue.c:3486) kthread (kernel/kthread.c:436) ret_from_fork (arch/x86/kernel/process.c:158) ret_from_fork_asm (arch/x86/entry/entry_64.S:245) The buggy address is located 16 bytes inside of allocated 33-byte region [ffff888000554e80, ffff888000554ea1) Kernel panic - not syncing: KASAN: panic_on_warn set ...

Patch / fix

  • Linux Linux 7.3
  • linux Debian 13 6.12.113-1
  • linux Debian 14 7.2.10-1
  • linux-6.12 Debian 12 6.12.113-1~deb12u1

debian advisories DEBIAN-CVE-2026-98725

  • linux Ubuntu 24.04 LTS 6.8.0-149.149
  • linux Ubuntu 26.04 LTS 7.0.0-43.43
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1069.74
  • linux-aws Ubuntu 26.04 LTS 7.0.0-1017.18
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1073.81
  • linux-gcp Ubuntu 26.04 LTS 7.0.0-1017.19
  • linux-gke Ubuntu 24.04 LTS 6.8.0-1068.77
  • linux-gke Ubuntu 26.04 LTS 7.0.0-1010.11

ubuntu advisories UBUNTU-CVE-2026-98725

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 AlmaLinux 9 5.14.0-687.64.1.el9_8
  • rv AlmaLinux 9 5.14.0-687.64.1.el9_8
  • perf AlmaLinux 9 5.14.0-687.64.1.el9_8
  • rtla AlmaLinux 9 5.14.0-687.64.1.el9_8
  • libperf AlmaLinux 9 5.14.0-687.64.1.el9_8
  • kernel-rt AlmaLinux 9 5.14.0-687.64.1.el9_8
  • kernel-64k AlmaLinux 9 5.14.0-687.64.1.el9_8
  • kernel-core AlmaLinux 9 5.14.0-687.64.1.el9_8

almalinux advisories ALSA-2026:93412ALSA-2026:93413

  • kernel Rocky Linux 10 6.12.0-211.72.1.el10_2
  • kernel Rocky Linux 9 5.14.0-687.64.1.el9_8

rocky linux advisories RLSA-2026:93413RLSA-2026:93412

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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-2026-98725 updated cvss 7.5

kernel: nvmet-auth: fix out-of-bounds write in nvmet_auth_challenge()

  • 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 Red Hat OpenShift Container Platform 5 openshift/ose-rhel-coreos-9
    affected: no fix available
  • Red Hat Enterprise Linux kernel-modules-internal 6.12.0-211.72.1.el10_2
    fixed: vendor fix RHSA-2026:93413
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-687.64.1.el9_8, rv 5.14.0-741.20.1.el9_9, perf 5.14.0-687.64.1.el9_8, perf 5.14.0-741.20.1.el9_9, rtla 5.14.0-687.64.1.el9_8, rtla 5.14.0-741.20.1.el9_9, +20 more
    fixed: vendor fix RHSA-2026:93412
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-211.72.1.el10_2, rv 6.12.0-264.14.1.el10_3, perf 6.12.0-211.72.1.el10_2, perf 6.12.0-264.14.1.el10_3, rtla 6.12.0-211.72.1.el10_2, rtla 6.12.0-264.14.1.el10_3, +20 more
    fixed: vendor fix RHSA-2026:93413
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-687.64.1.el9_8, kernel 5.14.0-741.20.1.el9_9, kernel-64k 5.14.0-687.64.1.el9_8, kernel-64k 5.14.0-741.20.1.el9_9, kernel-core 5.14.0-687.64.1.el9_8, kernel-core 5.14.0-741.20.1.el9_9, +60 more
    fixed: vendor fix RHSA-2026:93412
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-211.72.1.el10_2, kernel 6.12.0-264.14.1.el10_3, kernel-64k 6.12.0-211.72.1.el10_2, kernel-64k 6.12.0-264.14.1.el10_3, kernel-core 6.12.0-211.72.1.el10_2, kernel-core 6.12.0-264.14.1.el10_3, +62 more
    fixed: vendor fix RHSA-2026:93413
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-687.64.1.el9_8, libperf 5.14.0-741.20.1.el9_9, kernel-debuginfo-common-s390x 5.14.0-687.64.1.el9_8, kernel-debuginfo-common-s390x 5.14.0-741.20.1.el9_9, kernel-debuginfo-common-x86_64 5.14.0-687.64.1.el9_8, kernel-debuginfo-common-x86_64 5.14.0-741.20.1.el9_9, +4 more
    fixed: vendor fix RHSA-2026:93412
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-211.72.1.el10_2, libperf 6.12.0-264.14.1.el10_3, kernel-debuginfo-common-s390x 6.12.0-211.72.1.el10_2, kernel-debuginfo-common-s390x 6.12.0-264.14.1.el10_3, kernel-debuginfo-common-x86_64 6.12.0-211.72.1.el10_2, kernel-debuginfo-common-x86_64 6.12.0-264.14.1.el10_3, +4 more Red Hat Enterprise Linux Hidden (v. 10) kernel-modules-internal 6.12.0-211.72.1.el10_2, kernel-debuginfo-common-x86_64 6.12.0-211.72.1.el10_2
    fixed: vendor fix RHSA-2026:93413
show 6 more
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-687.64.1.el9_8, kernel-rt 5.14.0-741.20.1.el9_9, kernel-rt-64k 5.14.0-687.64.1.el9_8, kernel-rt-64k 5.14.0-741.20.1.el9_9, kernel-rt-core 5.14.0-687.64.1.el9_8, kernel-rt-core 5.14.0-741.20.1.el9_9, +34 more
    fixed: vendor fix RHSA-2026:93412
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-211.72.1.el10_2, kernel-rt 6.12.0-264.14.1.el10_3, kernel-rt-64k 6.12.0-211.72.1.el10_2, kernel-rt-64k 6.12.0-264.14.1.el10_3, kernel-rt-core 6.12.0-211.72.1.el10_2, kernel-rt-core 6.12.0-264.14.1.el10_3, +34 more
    fixed: vendor fix RHSA-2026:93413
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-687.64.1.el9_8, kernel-rt 5.14.0-741.20.1.el9_9, kernel-rt-core 5.14.0-687.64.1.el9_8, kernel-rt-core 5.14.0-741.20.1.el9_9, kernel-rt-modules 5.14.0-687.64.1.el9_8, kernel-rt-modules 5.14.0-741.20.1.el9_9, +15 more
    fixed: vendor fix RHSA-2026:93412
  • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-211.72.1.el10_2, kernel-rt 6.12.0-264.14.1.el10_3, kernel-rt-core 6.12.0-211.72.1.el10_2, kernel-rt-core 6.12.0-264.14.1.el10_3, kernel-rt-modules 6.12.0-211.72.1.el10_2, kernel-rt-modules 6.12.0-264.14.1.el10_3, +15 more
    fixed: vendor fix RHSA-2026:93413
  • Red Hat OpenShift Container Platform 4.22 rhcos 4.22.9.8.202611032353
    fixed: vendor fix RHSA-2026:95346
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8
    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

Exploit prediction

0.21% chance of exploitation in the next 30 days, higher than 11% of all scored CVEs (FIRST EPSS, 2026-11-11).

Affected products

  • Linux Linux

Classification

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.