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.
Affected products
linux: linux kernel
References9
- git.kernel.org/stable/c/0f3d9dd5e1fd52b39e25328307c6a694e994ffe3 Patch
- git.kernel.org/stable/c/26d3339e465e54107bd85884341d1609c5300d6a Patch
- git.kernel.org/stable/c/2c88b2d96e1d4d0c7c4589a4593d4cdee6d332d6 Patch
- git.kernel.org/stable/c/32ce55d424395904986f5066f8755f6cb9993377 Patch
- git.kernel.org/stable/c/5828b9e5b272ecff7cf5d345128d3de7324117f7 Patch
- git.kernel.org/stable/c/85a2f30e40f7468db732f55659bc6318874f49af Patch
- git.kernel.org/stable/c/b4b5a20bed82130da2f2818f04d52378952fbd0b Patch
- git.kernel.org/stable/c/fc39753b7f92e09177777e9c648afe5aa3abb81f Patch
- cert-portal.siemens.com/productcert/html/ssa-784472.html
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 3 · as of 14 November 2026
- CWE
- CWE-476
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