CVE-2026-98725nvmet-auth: fix out-of-bounds write in nvmet_auth_challenge()
- —Not scoredno CVSS score yet
- 0.21%Exploitation in 30 daysEPSS · top 89% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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 ...
Timeline
ID reserved
By Linux
- 23 days later
· 23 days later
Published
- 12 days later
· 12 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.21% · top 89% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected db1312dd95488b5e6ff362ff66fcf953a46b1821 – < e94ff1771c4cb398749789557f0b6feb871e3486
- affected db1312dd95488b5e6ff362ff66fcf953a46b1821 – < ef4dfad231a787aded76e5b03788ddb18c8aebab
- affected db1312dd95488b5e6ff362ff66fcf953a46b1821 – < 9d61131acd742cf97ee64e453383e41b46568513
- affected db1312dd95488b5e6ff362ff66fcf953a46b1821 – < 7fd3c363eba4f2aceb4b3f31cd1cf65e0dcbaee4
- affected db1312dd95488b5e6ff362ff66fcf953a46b1821 – < 8a9b4c0eef19c207663c1ee888257307c869ca86
- affected db1312dd95488b5e6ff362ff66fcf953a46b1821 – < fa6778e030bed9841ddcdf96bc7018da9ac03562
- affected 6.0
- unaffected < 6.0
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.160 – ≤ 6.6.*
- unaffected 6.12.113 – ≤ 6.12.*
- unaffected 6.18.56 – ≤ 6.18.*
- unaffected 7.2.10 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References6
- https://git.kernel.org/stable/c/e94ff1771c4cb398749789557f0b6feb871e3486 (opens in a new tab)
- https://git.kernel.org/stable/c/ef4dfad231a787aded76e5b03788ddb18c8aebab (opens in a new tab)
- https://git.kernel.org/stable/c/9d61131acd742cf97ee64e453383e41b46568513 (opens in a new tab)
- https://git.kernel.org/stable/c/7fd3c363eba4f2aceb4b3f31cd1cf65e0dcbaee4 (opens in a new tab)
- https://git.kernel.org/stable/c/8a9b4c0eef19c207663c1ee888257307c869ca86 (opens in a new tab)
- https://git.kernel.org/stable/c/fa6778e030bed9841ddcdf96bc7018da9ac03562 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-103810 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-98725)Record last updated .