CVE-2026-45838bpf: fix end-of-list detection in cgroup_storage_get_next_key()
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
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
- https://git.kernel.org/stable/c/0f3d9dd5e1fd52b39e25328307c6a694e994ffe3patch
- https://git.kernel.org/stable/c/26d3339e465e54107bd85884341d1609c5300d6apatch
- https://git.kernel.org/stable/c/2c88b2d96e1d4d0c7c4589a4593d4cdee6d332d6patch
- https://git.kernel.org/stable/c/b4b5a20bed82130da2f2818f04d52378952fbd0bpatch
- https://git.kernel.org/stable/c/85a2f30e40f7468db732f55659bc6318874f49afpatch
- https://git.kernel.org/stable/c/32ce55d424395904986f5066f8755f6cb9993377patch
- https://git.kernel.org/stable/c/fc39753b7f92e09177777e9c648afe5aa3abb81fpatch
- https://git.kernel.org/stable/c/5828b9e5b272ecff7cf5d345128d3de7324117f7patch
- 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.