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CVE-2026-45972smb: client: fix potential UAF and double free in smb2_open_file()
- 9.8CriticalCVSS base score
- 0.33%Exploitation in 30 daysEPSS · top 74% 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: smb: client: fix potential UAF and double free in smb2_open_file() Zero out @err_iov and @err_buftype before retrying SMB2_open() to prevent an UAF bug if @data != NULL, otherwise a double free.
Timeline
ID reserved
By Linux
- 14 days later
· 14 days later
Published
- 5 months later
· 5 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 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| redhat-SADPADP (enrichment) | 3.1 | High7.0 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.33% · top 74% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: total
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Affected products
- affected 743f70406264348c0830f38409eb6c40a42fb2db – < 96e53bb3ee2f354cf6b4ab07bcc56e500f8b3f74
- affected 3a6d6b332f92990958602c1e35ce0173e2dd62e9 – < 7425453ea16dbc3bbb0f6cac4d60b537e5e4d151
- affected b64e3b5d8d759dd4333992e4ba4dadf9359952c8 – < 4d339b219004869e96c4ce56b8891f83a38da4c0
- affected 9ee608a64e37cea5b4b13e436c559dd0fb2ad1b5 – < e66dcf7bb9c4df5582c82bc3582725abcbfbea73
- affected e3a43633023e3cacaca60d4b8972d084a2b06236 – < 639deb962986ef2f5e2a6d5a600c66f922471e81
- affected e3a43633023e3cacaca60d4b8972d084a2b06236 – < ebbbc4bfad4cb355d17c671223d0814ee3ef4eda
- affected 6.1.163 – < 6.1.165
- affected 6.6.124 – < 6.6.128
- affected 6.12.70 – < 6.12.75
- affected 6.18.10 – < 6.18.14
- affected 6.19
- unaffected < 6.19
- unaffected 6.1.165 – ≤ 6.1.*
- unaffected 6.6.128 – ≤ 6.6.*
- unaffected 6.12.75 – ≤ 6.12.*
- unaffected 6.18.14 – ≤ 6.18.*
- unaffected 6.19.4 – ≤ 6.19.*
- unaffected 7.0 – ≤ *
References
References9
- https://git.kernel.org/stable/c/96e53bb3ee2f354cf6b4ab07bcc56e500f8b3f74 (opens in a new tab)
- https://git.kernel.org/stable/c/7425453ea16dbc3bbb0f6cac4d60b537e5e4d151 (opens in a new tab)
- https://git.kernel.org/stable/c/4d339b219004869e96c4ce56b8891f83a38da4c0 (opens in a new tab)
- https://git.kernel.org/stable/c/e66dcf7bb9c4df5582c82bc3582725abcbfbea73 (opens in a new tab)
- https://git.kernel.org/stable/c/639deb962986ef2f5e2a6d5a600c66f922471e81 (opens in a new tab)
- https://git.kernel.org/stable/c/ebbbc4bfad4cb355d17c671223d0814ee3ef4eda (opens in a new tab)
- https://access.redhat.com/security/cve/CVE-2026-45972 (opens in a new tab)vdb-entryx_refsource_REDHAT
- RHBZ#2481973 (opens in a new tab)issue-trackingx_refsource_REDHAT
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45972.json (opens in a new tab)x_sadp-csaf-vex
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-2026-32256 (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-2026-45972)Record last updated .