Riskcovery

CVE-2024-50086

ksmbd: fix user-after-free from session log off

State
Published
Severity
9.8 Critical
Published
Oct 29, 2024
Updated
Aug 5, 2026
Reserved
Oct 21, 2024

Read the record on cve.org

Description

In the Linux kernel, the following vulnerability has been resolved:

ksmbd: fix user-after-free from session log off

There is racy issue between smb2 session log off and smb2 session setup. It will cause user-after-free from session log off. This add session_lock when setting SMB2_SESSION_EXPIRED and referece count to session struct not to free session while it is being used.

Scores

CVSSScoreVectorSource
3.19.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HLinux
3.17.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HCISA-ADP

Weaknesses

Affected Products

ProductVersions
LinuxLinux
  • 0626e6641f6b467447c81dd7678a69c66f7746cf to before 0f62358ce85b2d4c949ef1b648be01b29cec667aAffected
  • 0626e6641f6b467447c81dd7678a69c66f7746cf to before a9839c37fd813b432988f58a9d9dd59253d3eb2cAffected
  • 0626e6641f6b467447c81dd7678a69c66f7746cf to before 5511999e9615e4318e9142d23b29bd1597befc08Affected
  • 0626e6641f6b467447c81dd7678a69c66f7746cf to before ee371898b53a9b9b51c02d22a8c31bfb86d45f0dAffected
  • 0626e6641f6b467447c81dd7678a69c66f7746cf to before 7aa8804c0b67b3cb263a472d17f2cb50d7f1a930Affected
LinuxLinux
  • 5.15Affected
  • before 5.15Not affected
  • 5.15.171 through 5.15.*Not affected
  • 6.1.114 through 6.1.*Not affected
  • 6.6.58 through 6.6.*Not affected
  • 6.11.5 through 6.11.*Not affected
  • 6.12 and laterNot affected

References

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