CVE-2026-90358
HIGH
MEDIUM
Priority: 0.01
BB Relevance:
41/100
Published: 2026-09-17
Modified: 2026-10-30
First seen: 2026-10-30
Status: active
Attack Surface
Low Complexity
No Interaction
Conf. Impact
Integ. Impact
CVSS Vector Breakdown
AV:
Local
AC:
Low
PR:
Low
UI:
None
S:
Unchanged
C:
High
I:
High
A:
High
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.
Affected Software (7)
| Vendor | Product | Version |
|---|---|---|
| Linux | Linux | a9c5ad31fbdc4dec6d266fe22e51de1ad6d1bcf2 < 2189232984b45ac8281c80484ab9f67b380a2ca1 |
| Linux | Linux | a9c5ad31fbdc4dec6d266fe22e51de1ad6d1bcf2 < 7f96bf0d24b2acc0732906b60a10f06783f2470d |
| Linux | Linux | a9c5ad31fbdc4dec6d266fe22e51de1ad6d1bcf2 < 4aed2346fa9b88d458eeb8c01123f3c07585a675 |
| Linux | Linux | a9c5ad31fbdc4dec6d266fe22e51de1ad6d1bcf2 < 40f3bfbbb222b92278f3797614b70f68d46824ac |
| Linux | Linux | a9c5ad31fbdc4dec6d266fe22e51de1ad6d1bcf2 < a6d7d7a253c550e74b0651897fe313c2f9b2301f |
| Linux | Linux | a9c5ad31fbdc4dec6d266fe22e51de1ad6d1bcf2 < 814cba835ef648e0c5eb79505c96c0493b29eea6 |
| Linux | Linux | 6.1 |