Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix a potential use-after-free in bpf_link_free() After commit 1a80dbcb2dba, bpf_link can be freed by link->ops->dealloc_deferred, but the code still tests and uses link->ops->dealloc afterward, which leads to a use-after-free as reported by syzbot. Actually, one of them should be sufficient, so just call one of them instead of both. Also add a WARN_ON() in case of any problematic implementation.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 876941f533e7b47fc69977fc4551c02f2d18af97 before 91cff53136daeff50816b0baeafd38a6976f6209; affected 1a80dbcb2dbaf6e4c216e62e30fa7d3daa8001ce before fa97b8fed9896f1e89cb657513e483a152d4c382; affected 1a80dbcb2dbaf6e4c216e62e30fa7d3daa8001ce before 2884dc7d08d98a89d8d65121524bb7533183a63a; affected 5d8d447777564b35f67000e7838e7ccb64d525c8; affected 6.6.26 before 6.6.35; affected 6.8.5 before 6.9 |
| Linux / Linux | affected 6.9; unaffected 0 before 6.9; unaffected 6.6.35 through 6.6.*; unaffected 6.9.6 through 6.9.*; unaffected 6.10 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/91cff53136daeff50816b0baeafd38a6976f6209
- https://git.kernel.org/stable/c/fa97b8fed9896f1e89cb657513e483a152d4c382
- https://git.kernel.org/stable/c/2884dc7d08d98a89d8d65121524bb7533183a63a
ADP enrichment
No English description supplied.
No English description supplied.
No references supplied.