CVE-2026-90230nvmet: fix heap out-of-bounds read in nvmet_auth_negotiate()
- 9.1CriticalCVSS base score
- 0.46%Exploitation in 30 daysEPSS · top 60% 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: fix heap out-of-bounds read in nvmet_auth_negotiate() nvmet_execute_auth_send() allocates the DH-HMAC-CHAP message buffer with the host-supplied transfer length (tl) and hands it to nvmet_auth_negotiate() without passing tl along. nvmet_auth_negotiate() then reads the negotiate header and, for each of the halen hash identifiers and dhlen DH group identifiers, indexes into the fixed idlist[60] array (hashes at idlist[0..halen), groups at idlist[30..]). Neither the transfer length nor halen/dhlen is validated. A malicious or non-conformant host can report a tl smaller than the negotiate structure, or a halen/dhlen larger than the array (both are u8, up to 255), making the loops read past the end of the allocated buffer (heap out-of-bounds read). The sibling nvmet_auth_reply() already validates tl against the structure size; the negotiate path did not. Pass tl into nvmet_auth_negotiate(), reject a tl that does not cover the negotiate data plus one full protocol descriptor, and reject halen/dhlen larger than NVME_AUTH_DHCHAP_MAX_DH_IDS.
Timeline
ID reserved
By Linux
- 6 days later
· 6 days later
Published
- 32 days later
· 32 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
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | Critical9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
| NVDNVD · Received | 3.1 | Critical9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.46% · top 60% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.1.
Affected products
- affected db1312dd95488b5e6ff362ff66fcf953a46b1821 – < 89ff11b72f38976f3b5aea23a5228ee05e277209
- affected db1312dd95488b5e6ff362ff66fcf953a46b1821 – < aaac783950b17c57df9b6f7344747cacb1a407ed
- affected db1312dd95488b5e6ff362ff66fcf953a46b1821 – < c38a8186326799957d293d370136c128cd113916
- affected db1312dd95488b5e6ff362ff66fcf953a46b1821 – < 7b81e4d2230e3d2d372c826180c4ef0efc244f31
- affected db1312dd95488b5e6ff362ff66fcf953a46b1821 – < 5bb96cc218835769ab74ec7f3ea2bf81fbffe955
- affected 6.0
- unaffected < 6.0
- unaffected 6.6.157 – ≤ 6.6.*
- unaffected 6.12.110 – ≤ 6.12.*
- unaffected 6.18.52 – ≤ 6.18.*
- unaffected 7.2.6 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References5
- https://git.kernel.org/stable/c/89ff11b72f38976f3b5aea23a5228ee05e277209 (opens in a new tab)
- https://git.kernel.org/stable/c/aaac783950b17c57df9b6f7344747cacb1a407ed (opens in a new tab)
- https://git.kernel.org/stable/c/c38a8186326799957d293d370136c128cd113916 (opens in a new tab)
- https://git.kernel.org/stable/c/7b81e4d2230e3d2d372c826180c4ef0efc244f31 (opens in a new tab)
- https://git.kernel.org/stable/c/5bb96cc218835769ab74ec7f3ea2bf81fbffe955 (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-2026-81823 (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-2026-90230)Record last updated .