High severity7.5NVD Advisory· Published Jun 24, 2026· Updated Jul 15, 2026
CVE-2026-53026
CVE-2026-53026
Description
In the Linux kernel, the following vulnerability has been resolved:
NFSD: fix nfs4_file access extra count in nfsd4_add_rdaccess_to_wrdeleg
In nfsd4_add_rdaccess_to_wrdeleg, if fp->fi_fds[O_RDONLY] is already set by another thread, __nfs4_file_get_access should not be called to increment the nfs4_file access count since that was already done by the thread that added READ access to the file. The extra fi_access count in nfs4_file can prevent the corresponding nfsd_file from being freed.
When stopping nfs-server service, these extra access counts trigger a BUG in kmem_cache_destroy() that shows nfsd_file object remaining on __kmem_cache_shutdown.
This problem can be reproduced by running the Git project's test suite over NFS.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
84cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 7 more
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=6.18.4,<6.18.33
- cpe:2.3:o:linux:linux_kernel:6.19:-:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.19:rc7:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.19:rc8:*:*:*:*:*:*
- (no CPE)
- osv-coords76 versionspkg:linux/kernelpkg:rpm/almalinux/kernelpkg:rpm/almalinux/kernel-64kpkg:rpm/almalinux/kernel-64k-corepkg:rpm/almalinux/kernel-64k-debugpkg:rpm/almalinux/kernel-64k-debug-corepkg:rpm/almalinux/kernel-64k-debug-develpkg:rpm/almalinux/kernel-64k-debug-devel-matchedpkg:rpm/almalinux/kernel-64k-debug-modulespkg:rpm/almalinux/kernel-64k-debug-modules-corepkg:rpm/almalinux/kernel-64k-debug-modules-extrapkg:rpm/almalinux/kernel-64k-develpkg:rpm/almalinux/kernel-64k-devel-matchedpkg:rpm/almalinux/kernel-64k-modulespkg:rpm/almalinux/kernel-64k-modules-corepkg:rpm/almalinux/kernel-64k-modules-extrapkg:rpm/almalinux/kernel-abi-stablelistspkg:rpm/almalinux/kernel-corepkg:rpm/almalinux/kernel-cross-headerspkg:rpm/almalinux/kernel-debugpkg:rpm/almalinux/kernel-debug-corepkg:rpm/almalinux/kernel-debug-develpkg:rpm/almalinux/kernel-debug-devel-matchedpkg:rpm/almalinux/kernel-debug-modulespkg:rpm/almalinux/kernel-debug-modules-corepkg:rpm/almalinux/kernel-debug-modules-extrapkg:rpm/almalinux/kernel-debug-uki-virtpkg:rpm/almalinux/kernel-develpkg:rpm/almalinux/kernel-devel-matchedpkg:rpm/almalinux/kernel-docpkg:rpm/almalinux/kernel-headerspkg:rpm/almalinux/kernel-modulespkg:rpm/almalinux/kernel-modules-corepkg:rpm/almalinux/kernel-modules-extrapkg:rpm/almalinux/kernel-modules-extra-matchedpkg:rpm/almalinux/kernel-rtpkg:rpm/almalinux/kernel-rt-64kpkg:rpm/almalinux/kernel-rt-64k-corepkg:rpm/almalinux/kernel-rt-64k-debugpkg:rpm/almalinux/kernel-rt-64k-debug-corepkg:rpm/almalinux/kernel-rt-64k-debug-develpkg:rpm/almalinux/kernel-rt-64k-debug-modulespkg:rpm/almalinux/kernel-rt-64k-debug-modules-corepkg:rpm/almalinux/kernel-rt-64k-debug-modules-extrapkg:rpm/almalinux/kernel-rt-64k-develpkg:rpm/almalinux/kernel-rt-64k-modulespkg:rpm/almalinux/kernel-rt-64k-modules-corepkg:rpm/almalinux/kernel-rt-64k-modules-extrapkg:rpm/almalinux/kernel-rt-corepkg:rpm/almalinux/kernel-rt-debugpkg:rpm/almalinux/kernel-rt-debug-corepkg:rpm/almalinux/kernel-rt-debug-develpkg:rpm/almalinux/kernel-rt-debug-modulespkg:rpm/almalinux/kernel-rt-debug-modules-corepkg:rpm/almalinux/kernel-rt-debug-modules-extrapkg:rpm/almalinux/kernel-rt-develpkg:rpm/almalinux/kernel-rt-modulespkg:rpm/almalinux/kernel-rt-modules-corepkg:rpm/almalinux/kernel-rt-modules-extrapkg:rpm/almalinux/kernel-toolspkg:rpm/almalinux/kernel-tools-libspkg:rpm/almalinux/kernel-tools-libs-develpkg:rpm/almalinux/kernel-uki-virtpkg:rpm/almalinux/kernel-uki-virt-addonspkg:rpm/almalinux/kernel-zfcpdumppkg:rpm/almalinux/kernel-zfcpdump-corepkg:rpm/almalinux/kernel-zfcpdump-develpkg:rpm/almalinux/kernel-zfcpdump-devel-matchedpkg:rpm/almalinux/kernel-zfcpdump-modulespkg:rpm/almalinux/kernel-zfcpdump-modules-corepkg:rpm/almalinux/kernel-zfcpdump-modules-extrapkg:rpm/almalinux/libperfpkg:rpm/almalinux/perfpkg:rpm/almalinux/python3-perfpkg:rpm/almalinux/rtlapkg:rpm/almalinux/rv
< 6.18.33+ 75 more
- (no CPE)range: < 6.18.33
- (no CPE)range: < 6.12.0-211.50.1.el10_2
- (no CPE)range: < 6.12.0-211.50.1.el10_2
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- (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
Patches
Vulnerability mechanics
References
3News mentions
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