CVE-2026-68098ksmbd: bound DACL dedup walk to copied ACEs
- 8.8HighCVSS base score
- 0.45%Exploitation in 30 daysEPSS · top 61% 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: bound DACL dedup walk to copied ACEs set_ntacl_dacl() can stop copying ACEs before consuming the full input DACL when size accounting overflows. When that happens, num_aces reflects only the ACEs that were actually copied into the output DACL, but set_posix_acl_entries_dacl() still receives nt_num_aces and uses it to walk the existing ACE array during dedup. That makes the dedup walk scan past the copied ACE array and inspect buffer tail that does not contain valid ACEs. Split the two meanings currently carried by the NT ACE count. Pass the number of copied NT ACEs to bound the dedup walk, and preserve the original "input DACL had NT ACEs" state separately for the Everyone/default ACL fallback. This keeps the dedup walk aligned with the ACEs that are actually present in the rebuilt DACL.
Timeline
ID reserved
By Linux
- 11 days later
· 11 days later
Published
- 3 months later
· 3 months 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 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.45% · top 61% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.
Affected products
- affected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 – < 05aa552bd69a96e090cbd45656e18cdc46524e20
- affected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 – < 6d9d7aa4a2c99c31acfa28921c30b684110cf66c
- affected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 – < b057a851129c6a084e7e393b62ca3abf6c2660bc
- affected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 – < f1eba60db813ec28732bf18b5f0a67ebac9c3100
- affected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 – < a0ebdaa79e10210d4e8ed9fe138e8f4d569719e3
- affected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 – < 58d97fcd0bf1aee694e244cc28635b9df95b543b
- affected 5.15
- unaffected < 5.15
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.148 – ≤ 6.6.*
- unaffected 6.12.101 – ≤ 6.12.*
- unaffected 6.18.42 – ≤ 6.18.*
- unaffected 7.1.6 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References6
- https://git.kernel.org/stable/c/05aa552bd69a96e090cbd45656e18cdc46524e20 (opens in a new tab)
- https://git.kernel.org/stable/c/6d9d7aa4a2c99c31acfa28921c30b684110cf66c (opens in a new tab)
- https://git.kernel.org/stable/c/b057a851129c6a084e7e393b62ca3abf6c2660bc (opens in a new tab)
- https://git.kernel.org/stable/c/f1eba60db813ec28732bf18b5f0a67ebac9c3100 (opens in a new tab)
- https://git.kernel.org/stable/c/a0ebdaa79e10210d4e8ed9fe138e8f4d569719e3 (opens in a new tab)
- https://git.kernel.org/stable/c/58d97fcd0bf1aee694e244cc28635b9df95b543b (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-2026-55479 (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-2026-68098)Record last updated .