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CVE PROGRAM SOURCE RECORD7.8 High

CVE-2025-38273

net: tipc: fix refcount warning in tipc_aead_encrypt

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: net: tipc: fix refcount warning in tipc_aead_encrypt syzbot reported a refcount warning [1] caused by calling get_net() on a network namespace that is being destroyed (refcount=0). This happens when a TIPC discovery timer fires during network namespace cleanup. The recently added get_net() call in commit e279024617134 ("net/tipc: fix slab-use-after-free Read in tipc_aead_encrypt_done") attempts to hold a reference to the network namespace. However, if the namespace is already being destroyed, its refcount might be zero, leading to the use-after-free warning. Replace get_net() with maybe_get_net(), which safely checks if the refcount is non-zero before incrementing it. If the namespace is being destroyed, return -ENODEV early, after releasing the bearer reference. [1]: https://lore.kernel.org/all/68342b55.a70a0220.253bc2.0091.GAE@google.com/T/#m12019cf9ae77e1954f666914640efa36d52704a2

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

  • d42ed4de6aba232d946d20653a70f79158a6535b to < 445d59025d76d0638b03110f8791d5b89ed5162daffected
  • f5c2c4eaaa5a8e7e0685ec031d480e588e263e59 to < e0b11227c4e8eb4bdf1b86aa8f0f3abb24e0f029affected
  • b8fcae6d2e93c54cacb8f579a77d827c1c643eb5 to < 307391e8fe70401a6d39ecc9978e13c2c0cdf81faffected
  • b19fc1d0be3c3397e5968fe2627f22e7f84673b1 to < acab7ca5ff19889b80a8ee7dec220ee1a96dede9affected
  • 689a205cd968a1572ab561b0c4c2d50a10e9d3b0 to < c762fc79d710d676b793f9d98b1414efe6eb51e6affected
  • e279024617134c94fd3e37470156534d5f2b3472 to < 9ff60e0d9974dccf24e89bcd3ee7933e538d929faffected
  • e279024617134c94fd3e37470156534d5f2b3472 to < f29ccaa07cf3d35990f4d25028cc55470d29372baffected
  • 4a0fddc2c0d5c28aec8c262ad4603be0bef1938caffected
  • 5.10.238 to < 5.10.239affected
  • 5.15.185 to < 5.15.186affected
  • 6.1.141 to < 6.1.142affected
  • 6.6.93 to < 6.6.94affected
  • 6.12.31 to < 6.12.34affected
  • 6.14.9 to < 6.15affected

Linux Linux

Default version status: affected

  • 6.15affected
  • 0 to < 6.15unaffected
  • 5.10.239 to ≤ 5.10.*unaffected
  • 5.15.186 to ≤ 5.15.*unaffected
  • 6.1.142 to ≤ 6.1.*unaffected
  • 6.6.94 to ≤ 6.6.*unaffected
  • 6.12.34 to ≤ 6.12.*unaffected
  • 6.15.3 to ≤ 6.15.*unaffected
  • 6.16 to ≤ *unaffected

References