bpf, x86: Fix trampoline stack size for 128-bit arguments
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.
CVE-2026-90358
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-90358
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "a9c5ad31fbdc4dec6d266fe22e51de1ad6d1bcf2",
"lessThan": "7f96bf0d24b2acc0732906b60a10f06783f2470d",
"versionType": "git"
},
{
"status": "affected",
"version": "a9c5ad31fbdc4dec6d266fe22e51de1ad6d1bcf2",
"lessThan": "4aed2346fa9b88d458eeb8c01123f3c07585a675",
"versionType": "git"
},
{
"status": "affected",
"version": "a9c5ad31fbdc4dec6d266fe22e51de1ad6d1bcf2",
"lessThan": "40f3bfbbb222b92278f3797614b70f68d46824ac",
"versionType": "git"
},
{
"status": "affected",
"version": "a9c5ad31fbdc4dec6d266fe22e51de1ad6d1bcf2",
"lessThan": "a6d7d7a253c550e74b0651897fe313c2f9b2301f",
"versionType": "git"
},
{
"status": "affected",
"version": "a9c5ad31fbdc4dec6d266fe22e51de1ad6d1bcf2",
"lessThan": "814cba835ef648e0c5eb79505c96c0493b29eea6",
"versionType": "git"
}
],
"programFiles": [
"arch/x86/net/bpf_jit_comp.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.1"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.1",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"arch/x86/net/bpf_jit_comp.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-90358
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #48676 · Revision 1
- Added to Heist Feed
- Publisher date