bpf: Tighten cgroup storage cookie checks for prog arrays
In the Linux kernel, the following vulnerability has been resolved: bpf: Tighten cgroup storage cookie checks for prog arrays The fix in commit abad3d0bad72 ("bpf: Fix oob access in cgroup local storage") is still incomplete. The prog-array compatibility check treats a program with no cgroup storage as compatible with any stored storage cookie. This allows a storage-less program to bridge a tail call chain between an entry program and a storage-using callee even though cgroup local storage at runtime still follows the caller's context, that is, A -> B(no storage) -> C(storage) path. Requiring exact cookie equality would break the legitimate case of a storage-less leaf program being tail called from a storage-using one. Instead, only accept a zero storage cookie if the program cannot perform tail calls itself. This keeps A -> B(no storage) working while rejecting the A -> B(no storage) -> C(storage) bridge.
CVE-2026-74305
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-2026-74305
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": "c1c74584b9b4043c52e41fec415226e582d266a3",
"lessThan": "87177497cca90bf4fcfb759eb898560eb5b46a10",
"versionType": "git"
},
{
"status": "affected",
"version": "66da7cee78590259b400e51a70622ccd41da7bb2",
"lessThan": "1c762d28698483ce7c372091f34d86e4d4828652",
"versionType": "git"
},
{
"status": "affected",
"version": "7acfa07c585e3d7a64654d38f0a5c762877d0b9b",
"lessThan": "eb73056ce2a6f101ddd3bdba89af6b24ebffff85",
"versionType": "git"
},
{
"status": "affected",
"version": "41688d1fc5d163a6c2c0e95c0419e2cb31a44648",
"lessThan": "9ca06849c4239aa2d580c54651f8588c51cb398b",
"versionType": "git"
},
{
"status": "affected",
"version": "abad3d0bad72a52137e0c350c59542d75ae4f513",
"lessThan": "46fbafe3d2d569d828e8d24a7dbe1659f63685cf",
"versionType": "git"
},
{
"status": "affected",
"version": "abad3d0bad72a52137e0c350c59542d75ae4f513",
"lessThan": "cb22dc79528eb26a46d346c3118dbd6b14c70609",
"versionType": "git"
},
{
"status": "affected",
"version": "abad3d0bad72a52137e0c350c59542d75ae4f513",
"lessThan": "10627ddc0167aab5c1c390a10ef461e9937aba08",
"versionType": "git"
},
{
"status": "affected",
"version": "19341d5c59e8c7e8528e40f8663e99d67810473c",
"versionType": "git"
},
{
"status": "affected",
"version": "5.15.192",
"lessThan": "5.15.212",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.1.151",
"lessThan": "6.1.178",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.6.105",
"lessThan": "6.6.145",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.12.46",
"lessThan": "6.12.97",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.16.1",
"lessThan": "6.17",
"versionType": "semver"
}
],
"programFiles": [
"kernel/bpf/core.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.17"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.17",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.15.212",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.97",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.40",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"kernel/bpf/core.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-74305
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #33092 · Revision 1
- Added to Heist Feed
- Publisher date