Vulnerability Description
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 Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.6.32, < 6.6.130 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/960699317d39f46611f4ebeb69edc567c1f4e6b6Patch
- https://git.kernel.org/stable/c/b3568347c51c46e2cabc356bc34676df98296619Patch
- https://git.kernel.org/stable/c/bf4d66d72e4a9e268c1012c331ce9eaedb5e2086Patch
- https://git.kernel.org/stable/c/dbbd328cf58261ca239756fe1c0d10c9518d3399Patch
- https://git.kernel.org/stable/c/eac3361e3d5dd8067b3258c69615888eb45e9f25Patch
FAQ
What is CVE-2026-43379?
CVE-2026-43379 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 bein...
How severe is CVE-2026-43379?
CVE-2026-43379 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-43379?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.