bpf: Preserve unique-field state across nested structs
In the Linux kernel, the following vulnerability has been resolved: bpf: Preserve unique-field state across nested structs btf_find_struct_field() initializes a fresh seen mask for every recursive descent. Unique special fields in different levels of the same aggregate therefore do not see one another. The duplicate fields can reach btf_parse_fields(), where they trigger an invariant WARN_ON_ONCE(). A crafted user BTF can consequently trigger the warning before map creation checks capabilities. Initialize the seen mask once in btf_find_field() and pass the same pointer through struct, datasec, and nested-struct walks. This gives the entire field traversal one shared uniqueness state.
CVE-2026-92515
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-2026-92515
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": "64e8ee814819f21beeeda00d4119221443d77992",
"lessThan": "cec97102d4147e18568c93946014c4c8ebf86fcf",
"versionType": "git"
},
{
"status": "affected",
"version": "64e8ee814819f21beeeda00d4119221443d77992",
"lessThan": "28d5f20ed022ade0fb0bfbf50b78fec782083175",
"versionType": "git"
},
{
"status": "affected",
"version": "64e8ee814819f21beeeda00d4119221443d77992",
"lessThan": "373a1e9366e711b89bc5e45bd6edf33ef62402cd",
"versionType": "git"
},
{
"status": "affected",
"version": "64e8ee814819f21beeeda00d4119221443d77992",
"lessThan": "f08619f060468076e4acbdc10e0713af20d60e65",
"versionType": "git"
}
],
"programFiles": [
"kernel/bpf/btf.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.11"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.11",
"versionType": "semver"
},
{
"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": [
"kernel/bpf/btf.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-92515
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #37764 · Revision 1
- Added to Heist Feed
- Publisher date