Vulnerability details
CVE-2026-90358
Linux Linux
bpf, x86: Fix trampoline stack size for 128-bit arguments
CVSS 3.1
7.8High
Official description
In the Linux kernel, the following vulnerability has been resolved: bpf, x86: Fix trampoline stack size for 128-bit arguments btf_distill_func_proto() accepts a function argument up to 16 bytes, so a 128-bit scalar such as __int128 reaches the x86 trampoline with arg_size == 16. But the current implementation assumes an __int128 argument only needs one register, so the register save area is under-allocated and save_args() overwrites adjacent stack slots. Compute the register count from arg_size for all arguments to fix it.
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 | 6.1 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | a9c5ad31fbdc4dec6d266fe22e51de1ad6d1bcf2 ≤ v < 7f96bf0d24b2acc0732906b60a10f06783f2470d | CVEProject cvelistV5 (CNA) |
| Linux | Linux | a9c5ad31fbdc4dec6d266fe22e51de1ad6d1bcf2 ≤ v < 4aed2346fa9b88d458eeb8c01123f3c07585a675 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | a9c5ad31fbdc4dec6d266fe22e51de1ad6d1bcf2 ≤ v < 2189232984b45ac8281c80484ab9f67b380a2ca1 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | a9c5ad31fbdc4dec6d266fe22e51de1ad6d1bcf2 ≤ v < a6d7d7a253c550e74b0651897fe313c2f9b2301f | CVEProject cvelistV5 (CNA) |
| Linux | Linux | a9c5ad31fbdc4dec6d266fe22e51de1ad6d1bcf2 ≤ v < 814cba835ef648e0c5eb79505c96c0493b29eea6 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | a9c5ad31fbdc4dec6d266fe22e51de1ad6d1bcf2 ≤ v < 40f3bfbbb222b92278f3797614b70f68d46824ac | CVEProject cvelistV5 (CNA) |
References and advisories
6- https://git.kernel.org/stable/c/2189232984b45ac8281c80484ab9f67b380a2ca1
- https://git.kernel.org/stable/c/7f96bf0d24b2acc0732906b60a10f06783f2470d
- https://git.kernel.org/stable/c/4aed2346fa9b88d458eeb8c01123f3c07585a675
- https://git.kernel.org/stable/c/40f3bfbbb222b92278f3797614b70f68d46824ac
- https://git.kernel.org/stable/c/a6d7d7a253c550e74b0651897fe313c2f9b2301f
- https://git.kernel.org/stable/c/814cba835ef648e0c5eb79505c96c0493b29eea6
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Details
- Published
- 2026-09-17
- Last updated
- 2026-10-30
- State
- Published
- Assigner (CNA)
- Linux
Exploit prediction (EPSS)
0.16%
Probability of exploitation in 30 days
6.3%
Percentile (among all CVEs)
Weaknesses (CWE)
- —