CVE-2026-98041
bpf: Don't predict JMP32 pointer vs zero comparisons
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
In the Linux kernel, the following vulnerability has been resolved: bpf: Don't predict JMP32 pointer vs zero comparisons Consider the following program: r1 = map_value; /* low 32 bits are zero at runtime */ r6 = 0xdead000000000000; if w1 != 0 goto l1; l0: r1 += r6; r2 = *(u64 *)(r1 + 0); exit; l1: r6 = 0; goto l0; At the moment is_branch_taken() reports the jump as always taken, because it does not distinguish between BPF_JMP and BPF_JMP32 comparisons when processing 'if w1 != 0 ...'.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Sep 25, 2026 |
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Affected Versions
Linux / Linux
cac616db39c207dc63465a4e05c6ce0e60b2cce4 < d16f0eafcaa62e677a2b5b0dabc1f8d31dfe3d4d cac616db39c207dc63465a4e05c6ce0e60b2cce4 < e2ae33247e8b2dbe9d116d3e61cadf6d548339c6 cac616db39c207dc63465a4e05c6ce0e60b2cce4 < a4d7f94c1ca914469ced665ec2f98be669aef462 cac616db39c207dc63465a4e05c6ce0e60b2cce4 < e51179a4e09846f8fd0f26a05068520de2b301bf
Linux / Linux
5.8
References
git.kernel.org: https://git.kernel.org/stable/c/d16f0eafcaa62e677a2b5b0dabc1f8d31dfe3d4d git.kernel.org: https://git.kernel.org/stable/c/e2ae33247e8b2dbe9d116d3e61cadf6d548339c6 git.kernel.org: https://git.kernel.org/stable/c/a4d7f94c1ca914469ced665ec2f98be669aef462 git.kernel.org: https://git.kernel.org/stable/c/e51179a4e09846f8fd0f26a05068520de2b301bf