Medium 5.5Published May 27, 2026

CVE-2026-45838bpf: fix end-of-list detection in cgroup_storage_get_next_key()

Updated under an hour ago (Oct 26, 2026, 4:23 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from de9cbbaadba5adf88a19e46df61f7054000838f6 before 0f3d9dd5e1fd52b39e25328307c6a694e994ffe3; from de9cbbaadba5adf88a19e46df61f7054000838f6 before 26d3339e465e54107bd85884341d1609c5300d6a; from de9cbbaadba5adf88a19e46df61f7054000838f6 before 2c88b2d96e1d4d0c7c4589a4593d4cdee6d332d6; from de9cbbaadba5adf88a19e46df61f7054000838f6 before b4b5a20bed82130da2f2818f04d52378952fbd0b; from de9cbbaadba5adf88a19e46df61f7054000838f6 before 85a2f30e40f7468db732f55659bc6318874f49af; from de9cbbaadba5adf88a19e46df61f7054000838f6 before 32ce55d424395904986f5066f8755f6cb9993377; from de9cbbaadba5adf88a19e46df61f7054000838f6 before fc39753b7f92e09177777e9c648afe5aa3abb81f; from de9cbbaadba5adf88a19e46df61f7054000838f6 before 5828b9e5b272ecff7cf5d345128d3de7324117f7	CNA record
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name)	all versions	CISA ADP
linux linux_kernel linux:linux_kernel	from 4.19 before 5.10.258; from 5.11 before 5.15.209; from 5.16 before 6.1.175; from 6.2 before 6.6.141; from 6.7 before 6.12.91; from 6.13 before 6.18.33; from 6.19 before 7.0.10	NVD

References

References

https://git.kernel.org/stable/c/0f3d9dd5e1fd52b39e25328307c6a694e994ffe3	patch
https://git.kernel.org/stable/c/26d3339e465e54107bd85884341d1609c5300d6a	patch
https://git.kernel.org/stable/c/2c88b2d96e1d4d0c7c4589a4593d4cdee6d332d6	patch
https://git.kernel.org/stable/c/b4b5a20bed82130da2f2818f04d52378952fbd0b	patch
https://git.kernel.org/stable/c/85a2f30e40f7468db732f55659bc6318874f49af	patch
https://git.kernel.org/stable/c/32ce55d424395904986f5066f8755f6cb9993377	patch
https://git.kernel.org/stable/c/fc39753b7f92e09177777e9c648afe5aa3abb81f	patch
https://git.kernel.org/stable/c/5828b9e5b272ecff7cf5d345128d3de7324117f7	patch
https://cert-portal.siemens.com/productcert/html/ssa-784472.html

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.