Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected d42ed4de6aba232d946d20653a70f79158a6535b before 445d59025d76d0638b03110f8791d5b89ed5162d; affected f5c2c4eaaa5a8e7e0685ec031d480e588e263e59 before e0b11227c4e8eb4bdf1b86aa8f0f3abb24e0f029; affected b8fcae6d2e93c54cacb8f579a77d827c1c643eb5 before 307391e8fe70401a6d39ecc9978e13c2c0cdf81f; affected b19fc1d0be3c3397e5968fe2627f22e7f84673b1 before acab7ca5ff19889b80a8ee7dec220ee1a96dede9; affected 689a205cd968a1572ab561b0c4c2d50a10e9d3b0 before c762fc79d710d676b793f9d98b1414efe6eb51e6; affected e279024617134c94fd3e37470156534d5f2b3472 before 9ff60e0d9974dccf24e89bcd3ee7933e538d929f; affected e279024617134c94fd3e37470156534d5f2b3472 before f29ccaa07cf3d35990f4d25028cc55470d29372b; affected 4a0fddc2c0d5c28aec8c262ad4603be0bef1938c; affected 5.10.238 before 5.10.239; affected 5.15.185 before 5.15.186; affected 6.1.141 before 6.1.142; affected 6.6.93 before 6.6.94; affected 6.12.31 before 6.12.34; affected 6.14.9 before 6.15 |
| Linux / Linux | affected 6.15; unaffected 0 before 6.15; unaffected 5.10.239 through 5.10.*; unaffected 5.15.186 through 5.15.*; unaffected 6.1.142 through 6.1.*; unaffected 6.6.94 through 6.6.*; unaffected 6.12.34 through 6.12.*; unaffected 6.15.3 through 6.15.*; unaffected 6.16 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/445d59025d76d0638b03110f8791d5b89ed5162d
- https://git.kernel.org/stable/c/e0b11227c4e8eb4bdf1b86aa8f0f3abb24e0f029
- https://git.kernel.org/stable/c/307391e8fe70401a6d39ecc9978e13c2c0cdf81f
- https://git.kernel.org/stable/c/acab7ca5ff19889b80a8ee7dec220ee1a96dede9
- https://git.kernel.org/stable/c/c762fc79d710d676b793f9d98b1414efe6eb51e6
- https://git.kernel.org/stable/c/9ff60e0d9974dccf24e89bcd3ee7933e538d929f
- https://git.kernel.org/stable/c/f29ccaa07cf3d35990f4d25028cc55470d29372b
ADP enrichment
No English description supplied.