CVE-2026-90392
bpf: Fix potential UAF when reading bpf link info
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Sep 17, 2026 |
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Affected Versions
Linux / Linux
0c991ebc8c69d29b7fc44db17075c5aa5253e2ab < a5c936ac904767fc1d943d40b0308bcb2ae2509b 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab < d7d7208e2603b45724b684f4df73904fb347741e 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab < 85cf991c881e7198be32be05a9daa2625390c8b3 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab < 79347e42cfbc9e78872922e8f08a70609c9af82f 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab < 863f3ddd0b8ac65abfb50d3be0869268ac0e277b
Linux / Linux
5.7
References
git.kernel.org: https://git.kernel.org/stable/c/a5c936ac904767fc1d943d40b0308bcb2ae2509b git.kernel.org: https://git.kernel.org/stable/c/d7d7208e2603b45724b684f4df73904fb347741e git.kernel.org: https://git.kernel.org/stable/c/85cf991c881e7198be32be05a9daa2625390c8b3 git.kernel.org: https://git.kernel.org/stable/c/79347e42cfbc9e78872922e8f08a70609c9af82f git.kernel.org: https://git.kernel.org/stable/c/863f3ddd0b8ac65abfb50d3be0869268ac0e277b