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CVE-2026-89792ksmbd: prevent out-of-bounds reads in share config responses
- 7.1HighCVSS base score
- 0.16%Exploitation in 30 daysEPSS · top 94% 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: ksmbd: prevent out-of-bounds reads in share config responses Validate IPC share configuration payload sizes before consuming variable-length fields. Bound veto list parsing and account for the separator byte when deriving the path length.
Timeline
ID reserved
By Linux
- 5 days later
· 5 days later
Published
- 33 days later
· 33 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 | High7.1 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H |
| NVDNVD · Received | 3.1 | High7.1 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.16% · top 94% of all CVEs (12 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.1.
Affected products
- affected 88b7f1143b15b29cccb8392b4f38e75b7bb3e300 – < df8aa4a09733c4d3974b1db32c1782b3aad3a151
- affected 51a6c2af9d20203ddeeaf73314ba8854b38d01bd – < 0127f1c119bde40578f4d25f5d17333b4e75de8c
- affected a637fabac554270a851033f5ab402ecb90bc479c – < fd636a87161def6e35876ab7943641ce457974c8
- affected a677ebd8ca2f2632ccdecbad7b87641274e15aac – < ffa507f5f774cb4d45136b106989ebc051361263
- affected a677ebd8ca2f2632ccdecbad7b87641274e15aac – < cd2bcee450bc94770be56c0b896c1a1dc6838bd8
- affected a677ebd8ca2f2632ccdecbad7b87641274e15aac – < 61a8d06600c8c397f9a7e01940479d4c94a82f5f
- affected a677ebd8ca2f2632ccdecbad7b87641274e15aac – < f25e93768fcc5d8287e50b1ec52a42e4c276df34
- affected 76af689a45aa44714b46d1a7de4ffdf851ded896
- affected 5.15.157 – < 5.15.222
- affected 6.1.85 – < 6.1.189
- affected 6.6.26 – < 6.6.158
- affected 6.8.5 – < 6.9
- affected 6.9
- unaffected < 6.9
- unaffected 5.15.222 – ≤ 5.15.*
- unaffected 6.1.189 – ≤ 6.1.*
- unaffected 6.6.158 – ≤ 6.6.*
- unaffected 6.12.111 – ≤ 6.12.*
- unaffected 6.18.53 – ≤ 6.18.*
- unaffected 7.2.6 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References7
- https://git.kernel.org/stable/c/df8aa4a09733c4d3974b1db32c1782b3aad3a151 (opens in a new tab)
- https://git.kernel.org/stable/c/0127f1c119bde40578f4d25f5d17333b4e75de8c (opens in a new tab)
- https://git.kernel.org/stable/c/fd636a87161def6e35876ab7943641ce457974c8 (opens in a new tab)
- https://git.kernel.org/stable/c/ffa507f5f774cb4d45136b106989ebc051361263 (opens in a new tab)
- https://git.kernel.org/stable/c/cd2bcee450bc94770be56c0b896c1a1dc6838bd8 (opens in a new tab)
- https://git.kernel.org/stable/c/61a8d06600c8c397f9a7e01940479d4c94a82f5f (opens in a new tab)
- https://git.kernel.org/stable/c/f25e93768fcc5d8287e50b1ec52a42e4c276df34 (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-2026-80314 (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-2026-89792)Record last updated .