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

CVE-2026-45838
MEDIUM 5.5

At a glance

Source
NVD
EPSS
EPSS 0.13 % · percentile 3 ()
State
PUBLISHED
Published
Updated
Assigner
Linux
NVD status
Modified

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.

Weaknesses (CWE)

  • CWE-476 — NULL Pointer Dereference

References

Scores

VersionScoreVectorScored by
CVSS 3.1MEDIUM 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HNVD · nvd@nist.gov (Primary)

European references

CERT-FR advisories

Affected configurations (NVD CPE)

Affected products

ProductVersions
Linux · Linuxaffected de9cbbaadba5adf88a19e46df61f7054000838f6 < 0f3d9dd5e1fd52b39e25328307c6a694e994ffe3 ; affected de9cbbaadba5adf88a19e46df61f7054000838f6 < 26d3339e465e54107bd85884341d1609c5300d6a ; affected de9cbbaadba5adf88a19e46df61f7054000838f6 < 2c88b2d96e1d4d0c7c4589a4593d4cdee6d332d6 ; affected de9cbbaadba5adf88a19e46df61f7054000838f6 < b4b5a20bed82130da2f2818f04d52378952fbd0b ; affected de9cbbaadba5adf88a19e46df61f7054000838f6 < 85a2f30e40f7468db732f55659bc6318874f49af ; affected de9cbbaadba5adf88a19e46df61f7054000838f6 < 32ce55d424395904986f5066f8755f6cb9993377
Linux · Linuxaffected 4.19 ; unaffected 0 < 4.19 ; unaffected 5.10.258 ≤ 5.10.* ; unaffected 5.15.209 ≤ 5.15.* ; unaffected 6.1.175 ≤ 6.1.* ; unaffected 6.6.141 ≤ 6.6.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD