CVE-2026-43379

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

VendorProductVersion RangeStatus
LinuxLinux27b40b7bfcd121fe13a150ffe11957630cf49246 < bf4d66d72e4a9e268c1012c331ce9eaedb5e2086affected
LinuxLinux5fb282ba4fef8985a5acf2b32681f2ec07732561 < 960699317d39f46611f4ebeb69edc567c1f4e6b6affected
LinuxLinux5fb282ba4fef8985a5acf2b32681f2ec07732561 < dbbd328cf58261ca239756fe1c0d10c9518d3399affected
LinuxLinux5fb282ba4fef8985a5acf2b32681f2ec07732561 < b3568347c51c46e2cabc356bc34676df98296619affected
LinuxLinux5fb282ba4fef8985a5acf2b32681f2ec07732561 < eac3361e3d5dd8067b3258c69615888eb45e9f25affected
LinuxLinux6.6.32 < 6.6.130affected
LinuxLinux6.9affected
LinuxLinux0 < 6.9unaffected
LinuxLinux6.6.130 <= 6.6.*unaffected
LinuxLinux6.12.78 <= 6.12.*unaffected
LinuxLinux6.18.19 <= 6.18.*unaffected
LinuxLinux6.19.9 <= 6.19.*unaffected
LinuxLinux7.0 <= *unaffected

Weaknesses

References