CVE-2026-45838

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinuxde9cbbaadba5adf88a19e46df61f7054000838f6 < 0f3d9dd5e1fd52b39e25328307c6a694e994ffe3affected
LinuxLinuxde9cbbaadba5adf88a19e46df61f7054000838f6 < 26d3339e465e54107bd85884341d1609c5300d6aaffected
LinuxLinuxde9cbbaadba5adf88a19e46df61f7054000838f6 < 2c88b2d96e1d4d0c7c4589a4593d4cdee6d332d6affected
LinuxLinuxde9cbbaadba5adf88a19e46df61f7054000838f6 < b4b5a20bed82130da2f2818f04d52378952fbd0baffected
LinuxLinuxde9cbbaadba5adf88a19e46df61f7054000838f6 < 85a2f30e40f7468db732f55659bc6318874f49afaffected
LinuxLinuxde9cbbaadba5adf88a19e46df61f7054000838f6 < 32ce55d424395904986f5066f8755f6cb9993377affected
LinuxLinuxde9cbbaadba5adf88a19e46df61f7054000838f6 < fc39753b7f92e09177777e9c648afe5aa3abb81faffected
LinuxLinuxde9cbbaadba5adf88a19e46df61f7054000838f6 < 5828b9e5b272ecff7cf5d345128d3de7324117f7affected
LinuxLinux4.19affected
LinuxLinux0 < 4.19unaffected
LinuxLinux5.10.258 <= 5.10.*unaffected
LinuxLinux5.15.209 <= 5.15.*unaffected
LinuxLinux6.1.175 <= 6.1.*unaffected
LinuxLinux6.6.141 <= 6.6.*unaffected
LinuxLinux6.12.91 <= 6.12.*unaffected
LinuxLinux6.18.33 <= 6.18.*unaffected
LinuxLinux7.0.10 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References