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CVE-2023-52479ksmbd: fix uaf in smb20_oplock_break_ack
- 8.8HighCVSS base score
- 0.61%Exploitation in 30 daysEPSS · top 50% 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: fix uaf in smb20_oplock_break_ack drop reference after use opinfo.
Timeline
ID reserved
By Linux
- 9 days later
· 9 days later
Published
- 2 years later
· 2 years 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 |
| CISA-ADPADP (enrichment) | 3.1 | High7.1 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H |
| NVDNVD · Modified | 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)
- 0.61% · top 50% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.
Affected products
- affected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 – < 694e13732e830cbbfedb562e57f28644927c33fd
- affected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 – < 8226ffc759ea59f10067b9acdf7f94bae1c69930
- affected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 – < d5b0e9d3563e7e314a850e81f42b2ef6f39882f9
- affected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 – < c69813471a1ec081a0b9bf0c6bd7e8afd818afce
- affected 5.15
- unaffected < 5.15
- unaffected 5.15.135 – ≤ 5.15.*
- unaffected 6.1.57 – ≤ 6.1.*
- unaffected 6.5.7 – ≤ 6.5.*
- unaffected 6.6 – ≤ *
References
References4
- https://git.kernel.org/stable/c/694e13732e830cbbfedb562e57f28644927c33fd (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/8226ffc759ea59f10067b9acdf7f94bae1c69930 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/d5b0e9d3563e7e314a850e81f42b2ef6f39882f9 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/c69813471a1ec081a0b9bf0c6bd7e8afd818afce (opens in a new tab)x_transferred
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-2023-57104 (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-2023-52479)Record last updated .