bpf: Fix OOB in pcpu_init_value
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix OOB in pcpu_init_value An out-of-bounds read occurs when copying element from a BPF_MAP_TYPE_CGROUP_STORAGE map to another pcpu map with the same value_size that is not rounded up to 8 bytes. The issue happens when: 1. A CGROUP_STORAGE map is created with value_size not aligned to 8 bytes (e.g., 4 bytes) 2. A pcpu map is created with the same value_size (e.g., 4 bytes) 3. Update element in 2 with data in 1 pcpu_init_value assumes that all sources are rounded up to 8 bytes, and invokes copy_map_value_long to make a data copy, However, the assumption doesn't stand since there are some cases where the source may not be rounded up to 8 bytes, e.g., CGROUP_STORAGE, skb->data. the verifier verifies exactly the size that the source claims, not the size rounded up to 8 bytes by kernel, an OOB happens when the source has only 4 bytes while the copy size(4) is rounded up to 8.
CVE-2026-53076
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-2026-53076
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": "d3bec0138bfbe58606fc1d6f57a4cdc1a20218db",
"lessThan": "e19c5ed9f1922a6854073f8651a63fa7be26e9e9",
"versionType": "git"
},
{
"status": "affected",
"version": "d3bec0138bfbe58606fc1d6f57a4cdc1a20218db",
"lessThan": "e0378419b0e20178b5d100b27c9cc7e51064202e",
"versionType": "git"
},
{
"status": "affected",
"version": "d3bec0138bfbe58606fc1d6f57a4cdc1a20218db",
"lessThan": "6086079e6d1c32ba4c4b422612b8aebb1129a96c",
"versionType": "git"
},
{
"status": "affected",
"version": "d3bec0138bfbe58606fc1d6f57a4cdc1a20218db",
"lessThan": "634a793d0e1c822412095d25a1338f8831ad894c",
"versionType": "git"
},
{
"status": "affected",
"version": "d3bec0138bfbe58606fc1d6f57a4cdc1a20218db",
"lessThan": "576afddfee8d1108ee299bf10f581593540d1a36",
"versionType": "git"
},
{
"status": "affected",
"version": "c602ad2b52dcbca5af08e5137bd5575c039b52e3",
"versionType": "git"
},
{
"status": "affected",
"version": "ab68b940dd6f7b5f8e2557937162dcb8a0583a05",
"versionType": "git"
},
{
"status": "affected",
"version": "5.4.78",
"lessThan": "5.5",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.9.9",
"lessThan": "5.10",
"versionType": "semver"
}
],
"programFiles": [
"kernel/bpf/hashtab.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.10"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.10",
"versionType": "semver"
},
{
"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/hashtab.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-53076
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #40744 · Revision 1
- Added to Heist Feed
- Publisher date