CVE-2026-45838bpf: fix end-of-list detection in cgroup_storage_get_next_key()
- 5.5MediumCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 97% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 14 days later
· 14 days later
Published
- 5 months later
· 5 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.13% · top 97% of all CVEs (15 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected de9cbbaadba5adf88a19e46df61f7054000838f6 – < 0f3d9dd5e1fd52b39e25328307c6a694e994ffe3
- affected de9cbbaadba5adf88a19e46df61f7054000838f6 – < 26d3339e465e54107bd85884341d1609c5300d6a
- affected de9cbbaadba5adf88a19e46df61f7054000838f6 – < 2c88b2d96e1d4d0c7c4589a4593d4cdee6d332d6
- affected de9cbbaadba5adf88a19e46df61f7054000838f6 – < b4b5a20bed82130da2f2818f04d52378952fbd0b
- affected de9cbbaadba5adf88a19e46df61f7054000838f6 – < 85a2f30e40f7468db732f55659bc6318874f49af
- affected de9cbbaadba5adf88a19e46df61f7054000838f6 – < 32ce55d424395904986f5066f8755f6cb9993377
- affected de9cbbaadba5adf88a19e46df61f7054000838f6 – < fc39753b7f92e09177777e9c648afe5aa3abb81f
- affected de9cbbaadba5adf88a19e46df61f7054000838f6 – < 5828b9e5b272ecff7cf5d345128d3de7324117f7
- affected 4.19
- unaffected < 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.*
- unaffected 6.12.91 – ≤ 6.12.*
- unaffected 6.18.33 – ≤ 6.18.*
- unaffected 7.0.10 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References9
- https://git.kernel.org/stable/c/0f3d9dd5e1fd52b39e25328307c6a694e994ffe3 (opens in a new tab)
- https://git.kernel.org/stable/c/26d3339e465e54107bd85884341d1609c5300d6a (opens in a new tab)
- https://git.kernel.org/stable/c/2c88b2d96e1d4d0c7c4589a4593d4cdee6d332d6 (opens in a new tab)
- https://git.kernel.org/stable/c/b4b5a20bed82130da2f2818f04d52378952fbd0b (opens in a new tab)
- https://git.kernel.org/stable/c/85a2f30e40f7468db732f55659bc6318874f49af (opens in a new tab)
- https://git.kernel.org/stable/c/32ce55d424395904986f5066f8755f6cb9993377 (opens in a new tab)
- https://git.kernel.org/stable/c/fc39753b7f92e09177777e9c648afe5aa3abb81f (opens in a new tab)
- https://git.kernel.org/stable/c/5828b9e5b272ecff7cf5d345128d3de7324117f7 (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-32164 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-45838)Record last updated .