High severity7.8NVD Advisory· Published Jul 19, 2026· Updated Oct 8, 2026
CVE-2026-64015
CVE-2026-64015
Description
In the Linux kernel, the following vulnerability has been resolved:
security/keys: fix missed RCU read section on lookup
Nicholas Carlini reports that the keyring code calls assoc_array_find() in find_key_to_update() without holding the RCU read lock, while the assoc_array_gc() code really is designed around removing the node from the tree and then freeing it after an RCU grace-period.
The regular key handling doesn't see this because holding the keyring semaphore hides any lifetime issues, but the persistent key handling uses a different model.
Instead of extending the keyring locking, just do the simple RCU locking that the assoc_array was designed for.
Affected products
97- osv-coords90 versionspkg:linux/kernelpkg:rpm/opensuse/kernel-obs-build&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-default-base&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-docs&distro=openSUSE%20Leap%2016.0pkg:rpm/almalinux/kernel-64k-debugpkg:rpm/almalinux/kernel-rt-debug-corepkg:rpm/almalinux/kernel-zfcpdump-develpkg:rpm/almalinux/kernel-zfcpdump-devel-matchedpkg:rpm/almalinux/libperfpkg:rpm/almalinux/kernel-docpkg:rpm/opensuse/kernel-syms&distro=openSUSE%20Leap%2016.0pkg:rpm/almalinux/kernel-64k-devel-matchedpkg:rpm/almalinux/kernel-debug-modulespkg:rpm/almalinux/kernel-cross-headerspkg:rpm/almalinux/kernel-64k-develpkg:rpm/almalinux/kernel-64k-corepkg:rpm/almalinux/kernel-64k-debug-modules-extrapkg:rpm/almalinux/kernel-develpkg:rpm/almalinux/kernel-rt-64k-corepkg:rpm/almalinux/kernel-uki-virtpkg:rpm/almalinux/kernel-zfcpdumppkg:rpm/opensuse/kernel-64kb&distro=openSUSE%20Leap%2016.0pkg:rpm/almalinux/kernel-debug-modules-corepkg:rpm/almalinux/kernel-modules-extra-matchedpkg:rpm/almalinux/kernel-debug-corepkg:rpm/almalinux/kernel-rt-modulespkg:rpm/almalinux/kernel-toolspkg:rpm/almalinux/kernel-64k-debug-modulespkg:rpm/almalinux/kernel-64k-debug-modules-corepkg:rpm/almalinux/kernel-64k-modules-extrapkg:rpm/almalinux/kernel-debugpkg:rpm/almalinux/kernel-devel-matchedpkg:rpm/almalinux/kernel-rt-64k-develpkg:rpm/almalinux/kernel-rt-64k-modulespkg:rpm/almalinux/kernel-rt-modules-corepkg:rpm/opensuse/dtb-aarch64&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-default&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-zfcpdump&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-kvmsmall&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Leap%2016.0pkg:rpm/almalinux/kernel-abi-stablelistspkg:rpm/almalinux/kernel-corepkg:rpm/almalinux/kernel-rt-64k-debug-corepkg:rpm/almalinux/kernel-headerspkg:rpm/almalinux/kernel-rt-64k-debug-develpkg:rpm/almalinux/kernel-64k-debug-devel-matchedpkg:rpm/opensuse/kernel-obs-qa&distro=openSUSE%20Leap%2016.0pkg:rpm/almalinux/kernel-64kpkg:rpm/almalinux/kernel-64k-debug-corepkg:rpm/almalinux/kernel-64k-debug-develpkg:rpm/almalinux/kernel-64k-modulespkg:rpm/almalinux/kernel-debug-develpkg:rpm/almalinux/kernel-modulespkg:rpm/almalinux/kernel-rt-64k-debugpkg:rpm/almalinux/kernel-rt-64k-debug-modulespkg:rpm/almalinux/kernel-rt-64k-debug-modules-corepkg:rpm/almalinux/kernel-rt-debugpkg:rpm/almalinux/kernel-rt-debug-modulespkg:rpm/almalinux/kernel-zfcpdump-corepkg:rpm/almalinux/python3-perfpkg:rpm/almalinux/rvpkg:rpm/almalinux/kernel-rt-corepkg:rpm/almalinux/kernel-debug-modules-extrapkg:rpm/almalinux/kernel-rt-64k-modules-extrapkg:rpm/almalinux/kernel-uki-virt-addonspkg:rpm/almalinux/rtlapkg:rpm/almalinux/kernel-rt-modules-extrapkg:rpm/almalinux/kernel-modules-corepkg:rpm/almalinux/kernel-modules-extrapkg:rpm/almalinux/bpftoolpkg:rpm/almalinux/kernel-rt-debug-modules-corepkg:rpm/almalinux/perfpkg:rpm/almalinux/kernel-tools-libspkg:rpm/almalinux/kernelpkg:rpm/almalinux/kernel-rt-debug-modules-extrapkg:rpm/almalinux/kernel-tools-libs-develpkg:rpm/almalinux/kernel-zfcpdump-modules-extrapkg:rpm/almalinux/kernel-rt-64kpkg:rpm/opensuse/kernel-azure&distro=openSUSE%20Leap%2016.0pkg:rpm/almalinux/kernel-64k-modules-corepkg:rpm/almalinux/kernel-debug-devel-matchedpkg:rpm/almalinux/kernel-debug-uki-virtpkg:rpm/almalinux/kernel-rt-64k-debug-modules-extrapkg:rpm/almalinux/kernel-rt-64k-modules-corepkg:rpm/almalinux/kernel-zfcpdump-modules-corepkg:rpm/almalinux/kernel-rtpkg:rpm/almalinux/kernel-rt-debug-develpkg:rpm/almalinux/kernel-rt-develpkg:rpm/almalinux/kernel-zfcpdump-modulespkg:rpm/opensuse/kernel-rt&distro=openSUSE%20Leap%2016.0
>= 3.13.0, < 6.1.175+ 89 more
- (no CPE)range: >= 3.13.0, < 6.1.175
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-160000.38.1.160000.2.22
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 4.18.0-553.162.1.el8_10
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-160000.38.1
(expand)+ 6 more
- (no CPE)
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=3.13,<6.1.175
- cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:*
Patches
Vulnerability mechanics
References
6- git.kernel.org/stable/c/43a1e3744548e6fd85873e6fb43e293eb4010694nvdPatch
- git.kernel.org/stable/c/4c5d407ba3ff7f30561ff73ba1b07ed70c864edcnvdPatch
- git.kernel.org/stable/c/50bb3435a5e627bfbdc52eb4536f49f88b3486b8nvdPatch
- git.kernel.org/stable/c/5659e6923cb72f8e18e8b539109ab512455fe195nvdPatch
- git.kernel.org/stable/c/66288dcadf80974436250e9f70ed848836b835b5nvdPatch
- git.kernel.org/stable/c/cefa4265b11176c897a7d9e8e54d89e3701c5584nvdPatch
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