bpf, cgroup: Fix invalid storage access after __cgroup_bpf_attach failed
In the Linux kernel, the following vulnerability has been resolved: bpf, cgroup: Fix invalid storage access after __cgroup_bpf_attach failed A potential invalid storage access issue can occur after replacing a cgroup bpf prog. This occurs in the following scenario: 1. prog1 with storage is attached to a cgroup in multi-attach mode. 2. prog1 is replaced with prog2 using BPF_F_REPLACE in multi-attach mode, but fails midway (e.g. in bpf_trampoline_link_cgroup_shim or update_effective_progs). 3. A new prog3 is attached to the cgroup in multi-attach mode. The reason is that __cgroup_bpf_attach overwrites pl->storage with the new storage prior to attachment completion. When attachment fails midway, the cleanup path calls bpf_cgroup_storages_free(new_storage) to free the newly allocated storage, but fails to restore pl->storage back to old_storage. Consequently, the still-active prog1 holds invalid or dangling storage pointers, leading to an invalid memory access when prog1 executes and calls bpf_get_local_storage. Additionally, original pl->flags and cgrp->bpf.flags[atype] are left unrestored. Fix this by saving old_pl_flags, old_storage, and old_flags prior to the update, and properly restoring all of them in the cleanup path on error.
CVE-2026-90313
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-2026-90313
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": "7d9c3427894fe70d1347b4820476bf37736d2ff0",
"lessThan": "e26db0d636e4c24a6b16683ea95cf5077c64d74b",
"versionType": "git"
},
{
"status": "affected",
"version": "7d9c3427894fe70d1347b4820476bf37736d2ff0",
"lessThan": "aaca16e042527f7efe48b50799bc662f1a191ce1",
"versionType": "git"
},
{
"status": "affected",
"version": "7d9c3427894fe70d1347b4820476bf37736d2ff0",
"lessThan": "86ead176301109b78e1d14c0e9d0d9ff9723c769",
"versionType": "git"
},
{
"status": "affected",
"version": "7d9c3427894fe70d1347b4820476bf37736d2ff0",
"lessThan": "2c2218560b6e28a63ff7834ba26d09ff8efdee39",
"versionType": "git"
},
{
"status": "affected",
"version": "7d9c3427894fe70d1347b4820476bf37736d2ff0",
"lessThan": "6655c409707ec8ce9ce0850ffe4fe02331fd4d9c",
"versionType": "git"
}
],
"programFiles": [
"kernel/bpf/cgroup.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.9"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.9",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.157",
"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": [
"kernel/bpf/cgroup.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-90313
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #36664 · Revision 1
- Added to Heist Feed
- Publisher date