bpf: fix end-of-list detection in cgroup_storage_get_next_key()
In the Linux kernel, the following vulnerability has been resolved: bpf: fix end-of-list detection in cgroup_storage_get_next_key() list_next_entry() never returns NULL -- when the current element is the last entry it wraps to the list head via container_of(). The subsequent NULL check is therefore dead code and get_next_key() never returns -ENOENT for the last element, instead reading storage->key from a bogus pointer that aliases internal map fields and copying the result to userspace. Replace it with list_entry_is_head() so the function correctly returns -ENOENT when there are no more entries.
CVE-2026-45838
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-2026-45838
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": "de9cbbaadba5adf88a19e46df61f7054000838f6",
"lessThan": "0f3d9dd5e1fd52b39e25328307c6a694e994ffe3",
"versionType": "git"
},
{
"status": "affected",
"version": "de9cbbaadba5adf88a19e46df61f7054000838f6",
"lessThan": "26d3339e465e54107bd85884341d1609c5300d6a",
"versionType": "git"
},
{
"status": "affected",
"version": "de9cbbaadba5adf88a19e46df61f7054000838f6",
"lessThan": "2c88b2d96e1d4d0c7c4589a4593d4cdee6d332d6",
"versionType": "git"
},
{
"status": "affected",
"version": "de9cbbaadba5adf88a19e46df61f7054000838f6",
"lessThan": "b4b5a20bed82130da2f2818f04d52378952fbd0b",
"versionType": "git"
},
{
"status": "affected",
"version": "de9cbbaadba5adf88a19e46df61f7054000838f6",
"lessThan": "85a2f30e40f7468db732f55659bc6318874f49af",
"versionType": "git"
},
{
"status": "affected",
"version": "de9cbbaadba5adf88a19e46df61f7054000838f6",
"lessThan": "32ce55d424395904986f5066f8755f6cb9993377",
"versionType": "git"
},
{
"status": "affected",
"version": "de9cbbaadba5adf88a19e46df61f7054000838f6",
"lessThan": "fc39753b7f92e09177777e9c648afe5aa3abb81f",
"versionType": "git"
},
{
"status": "affected",
"version": "de9cbbaadba5adf88a19e46df61f7054000838f6",
"lessThan": "5828b9e5b272ecff7cf5d345128d3de7324117f7",
"versionType": "git"
}
],
"programFiles": [
"kernel/bpf/local_storage.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.19"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.19",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.258",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.209",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.175",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.141",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.91",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.33",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.10",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"kernel/bpf/local_storage.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-45838
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #28362 · Revision 1
- Added to Heist Feed
- Publisher date