CVE-2025-38273 (GCVE-0-2025-38273)

Vulnerability from cvelistv5 – Published: 2025-07-10 07:41 – Updated: 2025-11-03 17:36
VLAI?
Title
net: tipc: fix refcount warning in tipc_aead_encrypt
Summary
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
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: d42ed4de6aba232d946d20653a70f79158a6535b , < 445d59025d76d0638b03110f8791d5b89ed5162d (git)
Affected: f5c2c4eaaa5a8e7e0685ec031d480e588e263e59 , < e0b11227c4e8eb4bdf1b86aa8f0f3abb24e0f029 (git)
Affected: b8fcae6d2e93c54cacb8f579a77d827c1c643eb5 , < 307391e8fe70401a6d39ecc9978e13c2c0cdf81f (git)
Affected: b19fc1d0be3c3397e5968fe2627f22e7f84673b1 , < acab7ca5ff19889b80a8ee7dec220ee1a96dede9 (git)
Affected: 689a205cd968a1572ab561b0c4c2d50a10e9d3b0 , < c762fc79d710d676b793f9d98b1414efe6eb51e6 (git)
Affected: e279024617134c94fd3e37470156534d5f2b3472 , < 9ff60e0d9974dccf24e89bcd3ee7933e538d929f (git)
Affected: e279024617134c94fd3e37470156534d5f2b3472 , < f29ccaa07cf3d35990f4d25028cc55470d29372b (git)
Affected: 4a0fddc2c0d5c28aec8c262ad4603be0bef1938c (git)
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    Linux Linux Affected: 6.15
Unaffected: 0 , < 6.15 (semver)
Unaffected: 5.10.239 , ≤ 5.10.* (semver)
Unaffected: 5.15.186 , ≤ 5.15.* (semver)
Unaffected: 6.1.142 , ≤ 6.1.* (semver)
Unaffected: 6.6.94 , ≤ 6.6.* (semver)
Unaffected: 6.12.34 , ≤ 6.12.* (semver)
Unaffected: 6.15.3 , ≤ 6.15.* (semver)
Unaffected: 6.16 , ≤ * (original_commit_for_fix)
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