CVE-2026-45838

bpf: fix end-of-list detection in cgroup_storage_get_next_key()

State: Published
Severity: Not scored
Published: May 27, 2026
Updated: Oct 15, 2026
Reserved: May 13, 2026

Description

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	de9cbbaadba5adf88a19e46df61f7054000838f6 to before 0f3d9dd5e1fd52b39e25328307c6a694e994ffe3Affected de9cbbaadba5adf88a19e46df61f7054000838f6 to before 26d3339e465e54107bd85884341d1609c5300d6aAffected de9cbbaadba5adf88a19e46df61f7054000838f6 to before 2c88b2d96e1d4d0c7c4589a4593d4cdee6d332d6Affected de9cbbaadba5adf88a19e46df61f7054000838f6 to before b4b5a20bed82130da2f2818f04d52378952fbd0bAffected de9cbbaadba5adf88a19e46df61f7054000838f6 to before 85a2f30e40f7468db732f55659bc6318874f49afAffected de9cbbaadba5adf88a19e46df61f7054000838f6 to before 32ce55d424395904986f5066f8755f6cb9993377Affected de9cbbaadba5adf88a19e46df61f7054000838f6 to before fc39753b7f92e09177777e9c648afe5aa3abb81fAffected de9cbbaadba5adf88a19e46df61f7054000838f6 to before 5828b9e5b272ecff7cf5d345128d3de7324117f7Affected
LinuxLinux	4.19Affected before 4.19Not affected 5.10.258 through 5.10.Not affected 5.15.209 through 5.15.Not affected 6.1.175 through 6.1.Not affected 6.6.141 through 6.6.Not affected 6.12.91 through 6.12.Not affected 6.18.33 through 6.18.Not affected 7.0.10 through 7.0.*Not affected 7.1 and laterNot affected

Product

Versions

LinuxLinux

de9cbbaadba5adf88a19e46df61f7054000838f6 to before 0f3d9dd5e1fd52b39e25328307c6a694e994ffe3Affected
de9cbbaadba5adf88a19e46df61f7054000838f6 to before 26d3339e465e54107bd85884341d1609c5300d6aAffected
de9cbbaadba5adf88a19e46df61f7054000838f6 to before 2c88b2d96e1d4d0c7c4589a4593d4cdee6d332d6Affected
de9cbbaadba5adf88a19e46df61f7054000838f6 to before b4b5a20bed82130da2f2818f04d52378952fbd0bAffected
de9cbbaadba5adf88a19e46df61f7054000838f6 to before 85a2f30e40f7468db732f55659bc6318874f49afAffected
de9cbbaadba5adf88a19e46df61f7054000838f6 to before 32ce55d424395904986f5066f8755f6cb9993377Affected
de9cbbaadba5adf88a19e46df61f7054000838f6 to before fc39753b7f92e09177777e9c648afe5aa3abb81fAffected
de9cbbaadba5adf88a19e46df61f7054000838f6 to before 5828b9e5b272ecff7cf5d345128d3de7324117f7Affected

LinuxLinux

4.19Affected
before 4.19Not affected
5.10.258 through 5.10.*Not affected
5.15.209 through 5.15.*Not affected
6.1.175 through 6.1.*Not affected
6.6.141 through 6.6.*Not affected
6.12.91 through 6.12.*Not affected
6.18.33 through 6.18.*Not affected
7.0.10 through 7.0.*Not affected
7.1 and laterNot affected

References

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