Critical severity9.8NVD Advisory· Published Jul 19, 2026· Updated Aug 17, 2026
CVE-2026-63800
CVE-2026-63800
Description
In the Linux kernel, the following vulnerability has been resolved:
pNFS: Fix use-after-free in pnfs_update_layout()
When hitting the NFS_LAYOUT_RETURN branch in pnfs_update_layout(), the code calls pnfs_prepare_to_retry_layoutget(lo). If it succeeds, pnfs_put_layout_hdr(lo) is called before trace_pnfs_update_layout(), which still references 'lo'. This results in a use-after-free when the tracepoint accesses lo's fields.
Fix this by moving the tracepoint call before pnfs_put_layout_hdr(lo).
Affected products
85cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 6 more
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=5.4.91,<5.5
- cpe:2.3:o:linux:linux_kernel:5.11:-:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.11:rc4:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.11:rc5:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.11:rc6:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.11:rc7:*:*:*:*:*:*
- (no CPE)
- osv-coords78 versionspkg:rpm/almalinux/kernel-64k-devel-matchedpkg:rpm/almalinux/kernel-debug-modules-corepkg:rpm/almalinux/kernel-debug-modulespkg:rpm/almalinux/kernel-zfcpdump-develpkg:rpm/almalinux/kernel-zfcpdump-modulespkg:rpm/almalinux/kernel-debug-develpkg:rpm/almalinux/kernel-64kpkg:rpm/almalinux/kernel-docpkg:rpm/almalinux/kernel-rt-64k-modulespkg:rpm/almalinux/rtlapkg:rpm/almalinux/kernel-modulespkg:rpm/almalinux/kernel-rt-modules-corepkg:rpm/almalinux/kernel-tools-libspkg:rpm/opensuse/kernel-source&distro=openSUSE%20Tumbleweedpkg:linux/kernelpkg:rpm/almalinux/kernel-devel-matchedpkg:rpm/almalinux/kernel-headerspkg:rpm/almalinux/kernel-modules-extrapkg:rpm/almalinux/kernel-rt-modules-extrapkg:rpm/almalinux/kernel-tools-libs-develpkg:rpm/almalinux/kernel-zfcpdump-corepkg:rpm/almalinux/kernel-zfcpdump-modules-extrapkg:rpm/almalinux/perfpkg:rpm/almalinux/kernel-rt-debug-modules-corepkg:rpm/almalinux/kernel-64k-debug-modules-corepkg:rpm/almalinux/kernel-rt-debug-develpkg:rpm/almalinux/kernel-rt-debug-modulespkg:rpm/almalinux/kernel-zfcpdumppkg:rpm/almalinux/kernel-rt-corepkg:rpm/almalinux/kernel-64k-debugpkg:rpm/almalinux/kernel-64k-debug-develpkg:rpm/almalinux/kernel-64k-debug-modulespkg:rpm/almalinux/kernel-64k-modulespkg:rpm/almalinux/kernel-64k-modules-corepkg:rpm/almalinux/kernel-abi-stablelistspkg:rpm/almalinux/kernel-corepkg:rpm/almalinux/kernel-debug-corepkg:rpm/almalinux/kernel-debug-modules-extrapkg:rpm/almalinux/kernel-debug-uki-virtpkg:rpm/almalinux/kernel-rt-64k-debug-corepkg:rpm/almalinux/kernel-rt-64k-debug-modules-extrapkg:rpm/almalinux/kernel-rt-64k-develpkg:rpm/almalinux/kernel-rt-64k-modules-extrapkg:rpm/almalinux/kernel-uki-virt-addonspkg:rpm/almalinux/kernel-zfcpdump-devel-matchedpkg:rpm/almalinux/kernel-64k-modules-extrapkg:rpm/almalinux/kernelpkg:rpm/almalinux/kernel-64k-corepkg:rpm/almalinux/kernel-64k-debug-corepkg:rpm/almalinux/kernel-cross-headerspkg:rpm/almalinux/kernel-develpkg:rpm/almalinux/kernel-rt-64k-debug-modulespkg:rpm/almalinux/kernel-rt-debug-corepkg:rpm/almalinux/kernel-rt-modulespkg:rpm/almalinux/bpftoolpkg:rpm/almalinux/kernel-64k-develpkg:rpm/almalinux/kernel-rt-64kpkg:rpm/almalinux/kernel-rt-64k-debug-modules-corepkg:rpm/almalinux/kernel-rt-debugpkg:rpm/almalinux/kernel-toolspkg:rpm/almalinux/kernel-uki-virtpkg:rpm/almalinux/kernel-rt-64k-debug-develpkg:rpm/almalinux/kernel-rt-64k-corepkg:rpm/almalinux/kernel-rt-64k-modules-corepkg:rpm/almalinux/kernel-64k-debug-modules-extrapkg:rpm/almalinux/kernel-rtpkg:rpm/almalinux/kernel-rt-develpkg:rpm/almalinux/python3-perfpkg:rpm/almalinux/kernel-debug-devel-matchedpkg:rpm/almalinux/kernel-debugpkg:rpm/almalinux/kernel-rt-debug-modules-extrapkg:rpm/almalinux/kernel-zfcpdump-modules-corepkg:rpm/almalinux/kernel-rt-64k-debugpkg:rpm/almalinux/rvpkg:rpm/almalinux/kernel-modules-corepkg:rpm/almalinux/kernel-modules-extra-matchedpkg:rpm/almalinux/libperfpkg:rpm/almalinux/kernel-64k-debug-devel-matched
< 6.12.0-211.50.1.el10_2+ 77 more
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 7.1.4-1.1
- (no CPE)range: < 5.10.260
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 4.18.0-553.159.1.el8_10
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
Patches
Vulnerability mechanics
References
8- git.kernel.org/stable/c/13e198a90ca4050f4bee8a3f23680389a6563cccnvdPatch
- git.kernel.org/stable/c/1f24b8302c77dcaf79c64c073877a3b9f4dd25d2nvdPatch
- git.kernel.org/stable/c/200e7637f4d6a1342987045eea72641524f909dcnvdPatch
- git.kernel.org/stable/c/2883ddd7542b4437a2ab4908fe2773f690e20889nvdPatch
- git.kernel.org/stable/c/4ad8b9a85dbf57ca532ee9e65ad7e6498bfbbf98nvdPatch
- git.kernel.org/stable/c/7e37e9b3e82ade881e1798e2f4fcc54aff7793c1nvdPatch
- git.kernel.org/stable/c/9645aaf689aff57427ece3b9fa47d5b5399417f4nvdPatch
- git.kernel.org/stable/c/9c0fb5c09ae5bd68dc0038692af8127029cb0385nvdPatch
News mentions
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