CVE-2026-45838
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.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| Linux Linux |
≥ de9cbbaadba5adf88a19e46df61f7054000838f6; < 0f3d9dd5e1fd52b39e25328307c6a694e994ffe3 (affected, git) ≥ de9cbbaadba5adf88a19e46df61f7054000838f6; < 26d3339e465e54107bd85884341d1609c5300d6a (affected, git) ≥ de9cbbaadba5adf88a19e46df61f7054000838f6; < 2c88b2d96e1d4d0c7c4589a4593d4cdee6d332d6 (affected, git) ≥ de9cbbaadba5adf88a19e46df61f7054000838f6; < b4b5a20bed82130da2f2818f04d52378952fbd0b (affected, git) ≥ de9cbbaadba5adf88a19e46df61f7054000838f6; < 85a2f30e40f7468db732f55659bc6318874f49af (affected, git) ≥ de9cbbaadba5adf88a19e46df61f7054000838f6; < 32ce55d424395904986f5066f8755f6cb9993377 (affected, git) ≥ de9cbbaadba5adf88a19e46df61f7054000838f6; < fc39753b7f92e09177777e9c648afe5aa3abb81f (affected, git) ≥ de9cbbaadba5adf88a19e46df61f7054000838f6; < 5828b9e5b272ecff7cf5d345128d3de7324117f7 (affected, git) Other versions: unaffected |
CNA: Linux |
| Linux Linux |
4.19 (affected) ≥ 0; < 4.19 (unaffected, semver) ≥ 5.10.258; ≤ 5.10.* (unaffected, semver) ≥ 5.15.209; ≤ 5.15.* (unaffected, semver) ≥ 6.1.175; ≤ 6.1.* (unaffected, semver) ≥ 6.6.141; ≤ 6.6.* (unaffected, semver) ≥ 6.12.91; ≤ 6.12.* (unaffected, semver) ≥ 6.18.33; ≤ 6.18.* (unaffected, semver) ≥ 7.0.10; ≤ 7.0.* (unaffected, semver) ≥ 7.1; ≤ * (unaffected, original_commit_for_fix) Other versions: affected |
CNA: Linux |
| SIMATIC S7-1500 TM MFP - GNU/Linux subsystem Siemens |
≥ 0; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
No CVSS assessment reported. An unscored record is not a low-severity determination.
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://git.kernel.org/stable/c/0f3d9dd5e1fd52b39e25328307c6a694e994ffe3CNA: Linux
- https://git.kernel.org/stable/c/26d3339e465e54107bd85884341d1609c5300d6aCNA: Linux
- https://git.kernel.org/stable/c/2c88b2d96e1d4d0c7c4589a4593d4cdee6d332d6CNA: Linux
- https://git.kernel.org/stable/c/b4b5a20bed82130da2f2818f04d52378952fbd0bCNA: Linux
- https://git.kernel.org/stable/c/85a2f30e40f7468db732f55659bc6318874f49afCNA: Linux
- https://git.kernel.org/stable/c/32ce55d424395904986f5066f8755f6cb9993377CNA: Linux
- https://git.kernel.org/stable/c/fc39753b7f92e09177777e9c648afe5aa3abb81fCNA: Linux
- https://git.kernel.org/stable/c/5828b9e5b272ecff7cf5d345128d3de7324117f7CNA: Linux
- https://cert-portal.siemens.com/productcert/html/ssa-784472.htmlADP: siemens-SADP
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