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CVE PROGRAM SOURCE RECORD9.8 Critical

CVE-2026-43379

ksmbd: fix use-after-free in smb_lazy_parent_lease_break_close()

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Status
Published
Published
Updated
Assigning organization
Linux

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 27b40b7bfcd121fe13a150ffe11957630cf49246 to < bf4d66d72e4a9e268c1012c331ce9eaedb5e2086affected
  • 5fb282ba4fef8985a5acf2b32681f2ec07732561 to < 960699317d39f46611f4ebeb69edc567c1f4e6b6affected
  • 5fb282ba4fef8985a5acf2b32681f2ec07732561 to < dbbd328cf58261ca239756fe1c0d10c9518d3399affected
  • 5fb282ba4fef8985a5acf2b32681f2ec07732561 to < b3568347c51c46e2cabc356bc34676df98296619affected
  • 5fb282ba4fef8985a5acf2b32681f2ec07732561 to < eac3361e3d5dd8067b3258c69615888eb45e9f25affected
  • 6.6.32 to < 6.6.130affected

Linux Linux

Default version status: affected

  • 6.9affected
  • 0 to < 6.9unaffected
  • 6.6.130 to ≤ 6.6.*unaffected
  • 6.12.78 to ≤ 6.12.*unaffected
  • 6.18.19 to ≤ 6.18.*unaffected
  • 6.19.9 to ≤ 6.19.*unaffected
  • 7.0 to ≤ *unaffected

References