CVE-2026-43379ksmbd: fix use-after-free in smb_lazy_parent_lease_break_close()
Updated under an hour ago ()
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In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in smb_lazy_parent_lease_break_close() opinfo pointer obtained via rcu_dereference(fp->f_opinfo) is being accessed after rcu_read_unlock() has been called. This creates a race condition where the memory could be freed by a concurrent writer between the unlock and the subsequent pointer dereferences (opinfo->is_lease, etc.), leading to a use-after-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)
- Not given
- 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
- Analyzed
- Record last updated
- Aug 5, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 27b40b7bfcd121fe13a150ffe11957630cf49246 before bf4d66d72e4a9e268c1012c331ce9eaedb5e2086; from 5fb282ba4fef8985a5acf2b32681f2ec07732561 before 960699317d39f46611f4ebeb69edc567c1f4e6b6; from 5fb282ba4fef8985a5acf2b32681f2ec07732561 before dbbd328cf58261ca239756fe1c0d10c9518d3399; from 5fb282ba4fef8985a5acf2b32681f2ec07732561 before b3568347c51c46e2cabc356bc34676df98296619; from 5fb282ba4fef8985a5acf2b32681f2ec07732561 before eac3361e3d5dd8067b3258c69615888eb45e9f25; from 6.6.32 before 6.6.130 | CNA record |
linux linux_kernel linux:linux_kernel | from 6.6.32 before 6.6.130; from 6.9 before 6.12.78; from 6.13 before 6.18.19; from 6.19 before 6.19.9; 7.0; 7.0; 7.0 | NVD |
References
- https://git.kernel.org/stable/c/bf4d66d72e4a9e268c1012c331ce9eaedb5e2086patch
- https://git.kernel.org/stable/c/960699317d39f46611f4ebeb69edc567c1f4e6b6patch
- https://git.kernel.org/stable/c/dbbd328cf58261ca239756fe1c0d10c9518d3399patch
- https://git.kernel.org/stable/c/b3568347c51c46e2cabc356bc34676df98296619patch
- https://git.kernel.org/stable/c/eac3361e3d5dd8067b3258c69615888eb45e9f25patch
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.