Description
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.
Metrics
CVSS 3.1 7.8/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HAffected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab, < 4c8432a332d4a24dc2742f56062a53d8fad36f53; >= 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab, < a5c936ac904767fc1d943d40b0308bcb2ae2509b; >= 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab, < d7d7208e2603b45724b684f4df73904fb347741e; >= 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab, < 85cf991c881e7198be32be05a9daa2625390c8b3; >= 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab, < 79347e42cfbc9e78872922e8f08a70609c9af82f; >= 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab, < 863f3ddd0b8ac65abfb50d3be0869268ac0e277b |
| Linux | Linux | 5.7 |
References
- https://git.kernel.org/stable/c/4c8432a332d4a24dc2742f56062a53d8fad36f53
- https://git.kernel.org/stable/c/79347e42cfbc9e78872922e8f08a70609c9af82f
- https://git.kernel.org/stable/c/85cf991c881e7198be32be05a9daa2625390c8b3
- https://git.kernel.org/stable/c/863f3ddd0b8ac65abfb50d3be0869268ac0e277b
- https://git.kernel.org/stable/c/a5c936ac904767fc1d943d40b0308bcb2ae2509b
- https://git.kernel.org/stable/c/d7d7208e2603b45724b684f4df73904fb347741e
Timeline
- Published
- Sep 17, 2026
- Last modified
- Oct 30, 2026
- NVD status
- Received