CVE-2026-45972smb: client: fix potential UAF and double free in smb2_open_file()
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-825
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 743f70406264348c0830f38409eb6c40a42fb2db builds before 96e53bb3ee2f354cf6b4ab07bcc56e500f8b3f74; from 3a6d6b332f92990958602c1e35ce0173e2dd62e9 before 7425453ea16dbc3bbb0f6cac4d60b537e5e4d151; from b64e3b5d8d759dd4333992e4ba4dadf9359952c8 before 4d339b219004869e96c4ce56b8891f83a38da4c0; from 9ee608a64e37cea5b4b13e436c559dd0fb2ad1b5 before e66dcf7bb9c4df5582c82bc3582725abcbfbea73; from e3a43633023e3cacaca60d4b8972d084a2b06236 before 639deb962986ef2f5e2a6d5a600c66f922471e81; from e3a43633023e3cacaca60d4b8972d084a2b06236 before ebbbc4bfad4cb355d17c671223d0814ee3ef4eda; from 6.1.163 before 6.1.165; from 6.6.124 before 6.6.128; and 2 more ranges | CNA record |
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux | 10 | CISA ADP |
linux linux_kernel linux:linux_kernel | from 6.1.163 before 6.1.165; from 6.6.124 before 6.6.128; from 6.12.70 before 6.12.75; from 6.18.10 before 6.18.14; from 6.19.1 before 6.19.4; 6.19 | NVD |
References
- https://git.kernel.org/stable/c/96e53bb3ee2f354cf6b4ab07bcc56e500f8b3f74patch
- https://git.kernel.org/stable/c/7425453ea16dbc3bbb0f6cac4d60b537e5e4d151patch
- https://git.kernel.org/stable/c/4d339b219004869e96c4ce56b8891f83a38da4c0patch
- https://git.kernel.org/stable/c/e66dcf7bb9c4df5582c82bc3582725abcbfbea73patch
- https://git.kernel.org/stable/c/639deb962986ef2f5e2a6d5a600c66f922471e81patch
- https://git.kernel.org/stable/c/ebbbc4bfad4cb355d17c671223d0814ee3ef4edapatch
- https://access.redhat.com/security/cve/CVE-2026-45972
- https://bugzilla.redhat.com/show_bug.cgi?id=2481973
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45972.json
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.