CVE-2026-43379
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 27b40b7bfcd121fe13a150ffe11957630cf49246 < bf4d66d72e4a9e268c1012c331ce9eaedb5e2086 | affected |
| Linux | Linux | 5fb282ba4fef8985a5acf2b32681f2ec07732561 < 960699317d39f46611f4ebeb69edc567c1f4e6b6 | affected |
| Linux | Linux | 5fb282ba4fef8985a5acf2b32681f2ec07732561 < dbbd328cf58261ca239756fe1c0d10c9518d3399 | affected |
| Linux | Linux | 5fb282ba4fef8985a5acf2b32681f2ec07732561 < b3568347c51c46e2cabc356bc34676df98296619 | affected |
| Linux | Linux | 5fb282ba4fef8985a5acf2b32681f2ec07732561 < eac3361e3d5dd8067b3258c69615888eb45e9f25 | affected |
| Linux | Linux | 6.6.32 < 6.6.130 | affected |
| Linux | Linux | 6.9 | affected |
| Linux | Linux | 0 < 6.9 | unaffected |
| Linux | Linux | 6.6.130 <= 6.6.* | unaffected |
| Linux | Linux | 6.12.78 <= 6.12.* | unaffected |
| Linux | Linux | 6.18.19 <= 6.18.* | unaffected |
| Linux | Linux | 6.19.9 <= 6.19.* | unaffected |
| Linux | Linux | 7.0 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/bf4d66d72e4a9e268c1012c331ce9eaedb5e2086
- https://git.kernel.org/stable/c/960699317d39f46611f4ebeb69edc567c1f4e6b6
- https://git.kernel.org/stable/c/dbbd328cf58261ca239756fe1c0d10c9518d3399
- https://git.kernel.org/stable/c/b3568347c51c46e2cabc356bc34676df98296619
- https://git.kernel.org/stable/c/eac3361e3d5dd8067b3258c69615888eb45e9f25
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