bpf: Check params size before reading reserved fields
In the Linux kernel, the following vulnerability has been resolved: bpf: Check params size before reading reserved fields bpf_crypto_ctx_create() is a kfunc whose second argument is declared with the __sz annotation, so the verifier only guarantees that params__sz bytes of params are valid. The function nevertheless reads params->reserved[0] and params->reserved[1] (offsets 14 and 15) before comparing params__sz against the size of struct bpf_crypto_params, so a BPF program can pass a shorter buffer and have the kernel read past the region that was validated for it. Move the size check in front of the reserved field reads.
CVE-2026-98611
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-2026-98611
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": "3e1c6f35409f9e447bf37f64840f5b65576bfb78",
"lessThan": "e03253f5d65ebcd2a6d479f140c3bd9c7e4fb84a",
"versionType": "git"
},
{
"status": "affected",
"version": "3e1c6f35409f9e447bf37f64840f5b65576bfb78",
"lessThan": "cd12d3e08620257fbcaa262785d7f4b9473afc7a",
"versionType": "git"
},
{
"status": "affected",
"version": "3e1c6f35409f9e447bf37f64840f5b65576bfb78",
"lessThan": "86a0e945fb645ea90233fde239cd2de79f01974c",
"versionType": "git"
},
{
"status": "affected",
"version": "3e1c6f35409f9e447bf37f64840f5b65576bfb78",
"lessThan": "a11212910cf09b2fe8db9afa41ef60c4f81879c5",
"versionType": "git"
}
],
"programFiles": [
"kernel/bpf/crypto.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.10"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.10",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.55",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.9",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"kernel/bpf/crypto.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98611
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38631 · Revision 1
- Added to Heist Feed
- Publisher date