Vulnerability details
CVE-2026-93148
Linux Linux
bpf: Reject MEM_ALLOC BTF accesses past object bounds
CVSS 3.1
7.8High
Official description
In the Linux kernel, the following vulnerability has been resolved: bpf: Reject MEM_ALLOC BTF accesses past object bounds BTF struct walks relax the struct-size check for accesses through a trailing flexible array. That is valid for ordinary BTF type walking, but PTR_TO_BTF_ID | MEM_ALLOC values point to objects allocated with the static BTF type size. When walking a MEM_ALLOC object, reject the access before applying the flexible-array relaxation if the access range extends past the struct size. Apply the same policy to struct ID matching so kfunc and kptr type checks do not walk past the allocated object bounds either.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.8High | 3.1 | CVEProject cvelistV5 (CNA) (Linux) | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Linux | Linux | 6.2 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 958cf2e273f0929c66169e0788031310e8118722 ≤ v < 94033c193bc38794511b2ebfa3dc0287d3b2bf60 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 958cf2e273f0929c66169e0788031310e8118722 ≤ v < 90d36e825da4fadeede64784ceda975ab7b31dab | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 958cf2e273f0929c66169e0788031310e8118722 ≤ v < cf08ff2255de98cfcbc8bf7236fbeb38f0d5b4f1 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 958cf2e273f0929c66169e0788031310e8118722 ≤ v < e626a50d07d43421cbf7bfb5a084b33a5e276b6e | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 958cf2e273f0929c66169e0788031310e8118722 ≤ v < 9c9ee0324c774490ae953162aaaf4561d222bd93 | CVEProject cvelistV5 (CNA) |
References and advisories
5- https://git.kernel.org/stable/c/94033c193bc38794511b2ebfa3dc0287d3b2bf60
- https://git.kernel.org/stable/c/90d36e825da4fadeede64784ceda975ab7b31dab
- https://git.kernel.org/stable/c/cf08ff2255de98cfcbc8bf7236fbeb38f0d5b4f1
- https://git.kernel.org/stable/c/e626a50d07d43421cbf7bfb5a084b33a5e276b6e
- https://git.kernel.org/stable/c/9c9ee0324c774490ae953162aaaf4561d222bd93
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Details
- Published
- 2026-09-17
- Last updated
- 2026-10-21
- State
- Published
- Assigner (CNA)
- Linux
Exploit prediction (EPSS)
0.17%
Probability of exploitation in 30 days
7%
Percentile (among all CVEs)
Weaknesses (CWE)
- —