CVE-2026-93148
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.
How to fix
- Linux Linux94033c193bc38794511b2ebfa3dc0287d3b2bf60, 90d36e825da4fadeede64784ceda975ab7b31dab, cf08ff2255de98cfcbc8bf7236fbeb38f0d5b4f1, e626a50d07d43421cbf7bfb5a084b33a5e276b6e, 9c9ee0324c774490ae953162aaaf4561d222bd93 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 958cf2e273f0929c66169e0788031310e8118722 ≤ v < 94033c193bc38794511b2ebfa3dc0287d3b2bf60, 958cf2e273f0929c66169e0788031310e8118722 ≤ v < 90d36e825da4fadeede64784ceda975ab7b31dab, 958cf2e273f0929c66169e0788031310e8118722 ≤ v < cf08ff2255de98cfcbc8bf7236fbeb38f0d5b4f1, 958cf2e273f0929c66169e0788031310e8118722 ≤ v < e626a50d07d43421cbf7bfb5a084b33a5e276b6e, 958cf2e273f0929c66169e0788031310e8118722 ≤ v < 9c9ee0324c774490ae953162aaaf4561d222bd93, 6.2 | 94033c193bc38794511b2ebfa3dc0287d3b2bf60, 90d36e825da4fadeede64784ceda975ab7b31dab, cf08ff2255de98cfcbc8bf7236fbeb38f0d5b4f1, e626a50d07d43421cbf7bfb5a084b33a5e276b6e, 9c9ee0324c774490ae953162aaaf4561d222bd93 |
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