Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix potential UAF when reading bpf link info In bpf_link_show_fdinfo and bpf_link_get_info_by_fd, link->prog is accessed without holding any locks. If the prog is concurrently replaced via bpf_link_update, the old prog can be freed, leading to a potential UAF issue. Fix this by accessing link->prog under RCU protection to safely fetch the pointer and guarantee its lifetime while reading its fields.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab before a5c936ac904767fc1d943d40b0308bcb2ae2509b; affected 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab before d7d7208e2603b45724b684f4df73904fb347741e; affected 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab before 85cf991c881e7198be32be05a9daa2625390c8b3; affected 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab before 79347e42cfbc9e78872922e8f08a70609c9af82f; affected 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab before 863f3ddd0b8ac65abfb50d3be0869268ac0e277b |
| Linux / Linux | affected 5.7; unaffected 0 before 5.7; unaffected 6.6.157 through 6.6.*; unaffected 6.12.110 through 6.12.*; unaffected 6.18.52 through 6.18.*; unaffected 7.2.6 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/a5c936ac904767fc1d943d40b0308bcb2ae2509b
- https://git.kernel.org/stable/c/d7d7208e2603b45724b684f4df73904fb347741e
- https://git.kernel.org/stable/c/85cf991c881e7198be32be05a9daa2625390c8b3
- https://git.kernel.org/stable/c/79347e42cfbc9e78872922e8f08a70609c9af82f
- https://git.kernel.org/stable/c/863f3ddd0b8ac65abfb50d3be0869268ac0e277b