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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-98725
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-18 16:17:26 UTC
Updated2026-10-30 13:21:21 UTC
DescriptionIn 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 ...

Risk And Classification

EPSS: 0.002050000 probability, percentile 0.105640000 (date 2026-11-01)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected db1312dd95488b5e6ff362ff66fcf953a46b1821 e94ff1771c4cb398749789557f0b6feb871e3486 git Not specified
CNA Linux Linux affected db1312dd95488b5e6ff362ff66fcf953a46b1821 ef4dfad231a787aded76e5b03788ddb18c8aebab git Not specified
CNA Linux Linux affected db1312dd95488b5e6ff362ff66fcf953a46b1821 9d61131acd742cf97ee64e453383e41b46568513 git Not specified
CNA Linux Linux affected db1312dd95488b5e6ff362ff66fcf953a46b1821 7fd3c363eba4f2aceb4b3f31cd1cf65e0dcbaee4 git Not specified
CNA Linux Linux affected db1312dd95488b5e6ff362ff66fcf953a46b1821 8a9b4c0eef19c207663c1ee888257307c869ca86 git Not specified
CNA Linux Linux affected db1312dd95488b5e6ff362ff66fcf953a46b1821 fa6778e030bed9841ddcdf96bc7018da9ac03562 git Not specified
CNA Linux Linux affected 6.0 Not specified
CNA Linux Linux unaffected 6.0 semver Not specified
CNA Linux Linux unaffected 6.1.191 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.160 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.113 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.56 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.10 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/fa6778e030bed9841ddcdf96bc7018da9ac03562 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7fd3c363eba4f2aceb4b3f31cd1cf65e0dcbaee4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8a9b4c0eef19c207663c1ee888257307c869ca86 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e94ff1771c4cb398749789557f0b6feb871e3486 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ef4dfad231a787aded76e5b03788ddb18c8aebab 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9d61131acd742cf97ee64e453383e41b46568513 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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