High severity7.8NVD Advisory· Published Jul 25, 2026· Updated Oct 19, 2026
CVE-2026-64266
CVE-2026-64266
Description
In the Linux kernel, the following vulnerability has been resolved:
fuse: re-lock request before returning from fuse_ref_folio()
fuse_ref_folio() unlocks the request but does not re-lock it before returning. fuse_chan_abort() can end the request and the async end callback (eg fuse_writepage_free()) can free the args while the subsequent copy chain logic after fuse_ref_folio() accesses them, leading to use-after-free issues.
Fix this by locking the request in fuse_ref_folio() before returning.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
95- osv-coords93 versionspkg:apk/chainguard/linux-gcp-6.18pkg:apk/chainguard/linux-gcp-6.18-bootcpkg:linux/kernelpkg:rpm/almalinux/bpftoolpkg: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/rvpkg:rpm/opensuse/dtb-aarch64&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-64kb&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-azure&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-default&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/opensuse/kernel-kvmsmall&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-obs-build&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-obs-qa&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-rt&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/kernel-syms&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-zfcpdump&distro=openSUSE%20Leap%2016.0
< 6.18.44-r0+ 92 more
- (no CPE)range: < 6.18.44-r0
- (no CPE)range: < 6.18.44-r0
- (no CPE)range: >= 2.6.35, < 5.10.261
- (no CPE)range: < 4.18.0-553.177.1.el8_10
- (no CPE)range: < 4.18.0-553.177.1.el8_10
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 4.18.0-553.177.1.el8_10
- (no CPE)range: < 4.18.0-553.177.1.el8_10
- (no CPE)range: < 4.18.0-553.177.1.el8_10
- (no CPE)range: < 4.18.0-553.177.1.el8_10
- (no CPE)range: < 4.18.0-553.177.1.el8_10
- (no CPE)range: < 4.18.0-553.177.1.el8_10
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 4.18.0-553.177.1.el8_10
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 4.18.0-553.177.1.el8_10
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 4.18.0-553.177.1.el8_10
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 4.18.0-553.177.1.el8_10
- (no CPE)range: < 4.18.0-553.177.1.el8_10
- (no CPE)range: < 4.18.0-553.177.1.el8_10
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 4.18.0-553.177.1.el8_10
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 4.18.0-553.177.1.rt7.518.el8_10
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 4.18.0-553.177.1.rt7.518.el8_10
- (no CPE)range: < 4.18.0-553.177.1.rt7.518.el8_10
- (no CPE)range: < 4.18.0-553.177.1.rt7.518.el8_10
- (no CPE)range: < 4.18.0-553.177.1.rt7.518.el8_10
- (no CPE)range: < 4.18.0-553.177.1.rt7.518.el8_10
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 4.18.0-553.177.1.rt7.518.el8_10
- (no CPE)range: < 4.18.0-553.177.1.rt7.518.el8_10
- (no CPE)range: < 4.18.0-553.177.1.rt7.518.el8_10
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 4.18.0-553.177.1.rt7.518.el8_10
- (no CPE)range: < 4.18.0-553.177.1.el8_10
- (no CPE)range: < 4.18.0-553.177.1.el8_10
- (no CPE)range: < 4.18.0-553.177.1.el8_10
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 4.18.0-553.177.1.el8_10
- (no CPE)range: < 4.18.0-553.177.1.el8_10
- (no CPE)range: < 4.18.0-553.177.1.el8_10
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 4.18.0-553.177.1.el8_10
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 4.18.0-553.177.1.el8_10
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 4.18.0-553.177.1.el8_10
- (no CPE)range: < 4.18.0-553.177.1.el8_10
- (no CPE)range: < 6.12.0-211.68.1.el10_2
- (no CPE)range: < 6.12.0-211.68.1.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: < 6.12.0-160000.38.1.160000.2.22
- (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: < 6.12.0-160000.38.1
- (no CPE)range: < 7.1.7-1.1
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-160000.38.1
Patches
Vulnerability mechanics
References
8- git.kernel.org/stable/c/0e4a5a000123d81234e27a2f8187688cf608f755nvdPatch
- git.kernel.org/stable/c/1ca605cfa59377f0143fb35b5b01360f37d1b7c4nvdPatch
- git.kernel.org/stable/c/1f9156714592356b4fda57beac7eab9c2a462dd3nvdPatch
- git.kernel.org/stable/c/5630da218a45ba80f0aba0846cbe8aa655da122bnvdPatch
- git.kernel.org/stable/c/65a1c2551f7e16085acbb54aedde1feaa559ba7anvdPatch
- git.kernel.org/stable/c/b5befa80fdbe287a98480effed9564712924add5nvdPatch
- git.kernel.org/stable/c/be353caffa8640f5e25fb3714ce8b0cef5e410e5nvdPatch
- git.kernel.org/stable/c/e6aa539720c3d8def69683ed0c07cf9faea4e8benvdPatch
News mentions
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