Vulnerability · Published Jul 25, 2026 · Assigned by Linux

CVE-2026-64266fuse: re-lock request before returning from fuse_ref_folio()

High 7.8

In plain English

A high-severity race condition in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.1%top 97.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8bpftool4.18.0-553.177.1.el8_10ALSA-2026:87375
AlmaLinux:10kernel6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:8kernel4.18.0-553.177.1.el8_10ALSA-2026:87375
AlmaLinux:9kernel5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-64k6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9kernel-64k5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-64k-core6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9kernel-64k-core5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-64k-debug6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9kernel-64k-debug5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-64k-debug-core6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9kernel-64k-debug-core5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-64k-debug-devel6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9kernel-64k-debug-devel5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-64k-debug-devel-matched6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9kernel-64k-debug-devel-matched5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-64k-debug-modules6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9kernel-64k-debug-modules5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-64k-debug-modules-core6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9kernel-64k-debug-modules-core5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-64k-debug-modules-extra6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9kernel-64k-debug-modules-extra5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-64k-devel6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9kernel-64k-devel5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-64k-devel-matched6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9kernel-64k-devel-matched5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-64k-modules6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9kernel-64k-modules5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-64k-modules-core6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9kernel-64k-modules-core5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-64k-modules-extra6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9kernel-64k-modules-extra5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-abi-stablelists6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:8kernel-abi-stablelists4.18.0-553.177.1.el8_10ALSA-2026:87375
AlmaLinux:9kernel-abi-stablelists5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-core6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:8kernel-core4.18.0-553.177.1.el8_10ALSA-2026:87375
AlmaLinux:9kernel-core5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-cross-headers6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:8kernel-cross-headers4.18.0-553.177.1.el8_10ALSA-2026:87375
AlmaLinux:9kernel-cross-headers5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-debug6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:8kernel-debug4.18.0-553.177.1.el8_10ALSA-2026:87375
AlmaLinux:9kernel-debug5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-debug-core6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:8kernel-debug-core4.18.0-553.177.1.el8_10ALSA-2026:87375
AlmaLinux:9kernel-debug-core5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-debug-devel6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:8kernel-debug-devel4.18.0-553.177.1.el8_10ALSA-2026:87375
AlmaLinux:9kernel-debug-devel5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-debug-devel-matched6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9kernel-debug-devel-matched5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-debug-modules6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:8kernel-debug-modules4.18.0-553.177.1.el8_10ALSA-2026:87375
AlmaLinux:9kernel-debug-modules5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-debug-modules-core6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9kernel-debug-modules-core5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-debug-modules-extra6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:8kernel-debug-modules-extra4.18.0-553.177.1.el8_10ALSA-2026:87375
AlmaLinux:9kernel-debug-modules-extra5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-debug-uki-virt6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9kernel-debug-uki-virt5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-devel6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:8kernel-devel4.18.0-553.177.1.el8_10ALSA-2026:87375
AlmaLinux:9kernel-devel5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-devel-matched6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9kernel-devel-matched5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-doc6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:8kernel-doc4.18.0-553.177.1.el8_10ALSA-2026:87375
AlmaLinux:9kernel-doc5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-headers6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:8kernel-headers4.18.0-553.177.1.el8_10ALSA-2026:87375
AlmaLinux:9kernel-headers5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-modules6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:8kernel-modules4.18.0-553.177.1.el8_10ALSA-2026:87375
AlmaLinux:9kernel-modules5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-modules-core6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9kernel-modules-core5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-modules-extra6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:8kernel-modules-extra4.18.0-553.177.1.el8_10ALSA-2026:87375
AlmaLinux:9kernel-modules-extra5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-modules-extra-matched6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:10kernel-rt6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:8kernel-rt4.18.0-553.177.1.rt7.518.el8_10ALSA-2026:87374
AlmaLinux:9kernel-rt5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-rt-64k6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9kernel-rt-64k5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-rt-64k-core6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9kernel-rt-64k-core5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-rt-64k-debug6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9kernel-rt-64k-debug5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-rt-64k-debug-core6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9kernel-rt-64k-debug-core5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-rt-64k-debug-devel6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9kernel-rt-64k-debug-devel5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-rt-64k-debug-modules6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9kernel-rt-64k-debug-modules5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-rt-64k-debug-modules-core6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9kernel-rt-64k-debug-modules-core5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-rt-64k-debug-modules-extra6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9kernel-rt-64k-debug-modules-extra5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-rt-64k-devel6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9kernel-rt-64k-devel5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-rt-64k-modules6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9kernel-rt-64k-modules5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-rt-64k-modules-core6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9kernel-rt-64k-modules-core5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-rt-64k-modules-extra6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9kernel-rt-64k-modules-extra5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-rt-core6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:8kernel-rt-core4.18.0-553.177.1.rt7.518.el8_10ALSA-2026:87374
AlmaLinux:9kernel-rt-core5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-rt-debug6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:8kernel-rt-debug4.18.0-553.177.1.rt7.518.el8_10ALSA-2026:87374
AlmaLinux:9kernel-rt-debug5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-rt-debug-core6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:8kernel-rt-debug-core4.18.0-553.177.1.rt7.518.el8_10ALSA-2026:87374
AlmaLinux:9kernel-rt-debug-core5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-rt-debug-devel6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:8kernel-rt-debug-devel4.18.0-553.177.1.rt7.518.el8_10ALSA-2026:87374
AlmaLinux:9kernel-rt-debug-devel5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-rt-debug-modules6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:8kernel-rt-debug-modules4.18.0-553.177.1.rt7.518.el8_10ALSA-2026:87374
AlmaLinux:9kernel-rt-debug-modules5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-rt-debug-modules-core6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9kernel-rt-debug-modules-core5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-rt-debug-modules-extra6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:8kernel-rt-debug-modules-extra4.18.0-553.177.1.rt7.518.el8_10ALSA-2026:87374
AlmaLinux:9kernel-rt-debug-modules-extra5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-rt-devel6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:8kernel-rt-devel4.18.0-553.177.1.rt7.518.el8_10ALSA-2026:87374
AlmaLinux:9kernel-rt-devel5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-rt-modules6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:8kernel-rt-modules4.18.0-553.177.1.rt7.518.el8_10ALSA-2026:87374
AlmaLinux:9kernel-rt-modules5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-rt-modules-core6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9kernel-rt-modules-core5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-rt-modules-extra6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:8kernel-rt-modules-extra4.18.0-553.177.1.rt7.518.el8_10ALSA-2026:87374
AlmaLinux:9kernel-rt-modules-extra5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-tools6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:8kernel-tools4.18.0-553.177.1.el8_10ALSA-2026:87375
AlmaLinux:9kernel-tools5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-tools-libs6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:8kernel-tools-libs4.18.0-553.177.1.el8_10ALSA-2026:87375
AlmaLinux:9kernel-tools-libs5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-tools-libs-devel6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:8kernel-tools-libs-devel4.18.0-553.177.1.el8_10ALSA-2026:87375
AlmaLinux:9kernel-tools-libs-devel5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-uki-virt6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9kernel-uki-virt5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-uki-virt-addons6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9kernel-uki-virt-addons5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-zfcpdump6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:8kernel-zfcpdump4.18.0-553.177.1.el8_10ALSA-2026:87375
AlmaLinux:9kernel-zfcpdump5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-zfcpdump-core6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:8kernel-zfcpdump-core4.18.0-553.177.1.el8_10ALSA-2026:87375
AlmaLinux:9kernel-zfcpdump-core5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-zfcpdump-devel6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:8kernel-zfcpdump-devel4.18.0-553.177.1.el8_10ALSA-2026:87375
AlmaLinux:9kernel-zfcpdump-devel5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-zfcpdump-devel-matched6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9kernel-zfcpdump-devel-matched5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-zfcpdump-modules6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:8kernel-zfcpdump-modules4.18.0-553.177.1.el8_10ALSA-2026:87375
AlmaLinux:9kernel-zfcpdump-modules5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-zfcpdump-modules-core6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9kernel-zfcpdump-modules-core5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10kernel-zfcpdump-modules-extra6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:8kernel-zfcpdump-modules-extra4.18.0-553.177.1.el8_10ALSA-2026:87375
AlmaLinux:9kernel-zfcpdump-modules-extra5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10libperf6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9libperf5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10perf6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:8perf4.18.0-553.177.1.el8_10ALSA-2026:87375
AlmaLinux:9perf5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10python3-perf6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:8python3-perf4.18.0-553.177.1.el8_10ALSA-2026:87375
AlmaLinux:9python3-perf5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10rtla6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9rtla5.14.0-687.61.1.el9_8ALSA-2026:90365
AlmaLinux:10rv6.12.0-211.68.1.el10_2ALSA-2026:88477
AlmaLinux:9rv5.14.0-687.61.1.el9_8ALSA-2026:90365
Debian:12linux6.1.180-1DEBIAN-CVE-2026-64266
Debian:13linux6.12.96-1DEBIAN-CVE-2026-64266
Debian:14linux7.1.4-1DEBIAN-CVE-2026-64266
Debian:12linux-6.126.12.100-1~deb12u1DEBIAN-CVE-2026-64266
Rocky Linux:10kernel0:6.12.0-211.68.1.el10_2RLSA-2026:88477
Rocky Linux:8kernel0:4.18.0-553.177.1.el8_10RLSA-2026:87375
Rocky Linux:9kernel0:5.14.0-687.61.1.el9_8RLSA-2026:90365
Rocky Linux:9kernel0:5.14.0-687.61.1.el9_8.cloud.1.0RXSA-2026:90365
Rocky Linux:8kernel-rt0:4.18.0-553.177.1.rt7.518.el8_10RLSA-2026:87374
Ubuntu:22.04:LTSlinux5.15.0-198.208UBUNTU-CVE-2026-64266
Ubuntu:24.04:LTSlinux6.8.0-147.147UBUNTU-CVE-2026-64266
Ubuntu:26.04:LTSlinux7.0.0-31.31UBUNTU-CVE-2026-64266
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-64266
Ubuntu:22.04:LTSlinux-aws5.15.0-1117.124UBUNTU-CVE-2026-64266
Ubuntu:24.04:LTSlinux-aws6.8.0-1067.70UBUNTU-CVE-2026-64266
Ubuntu:26.04:LTSlinux-aws7.0.0-1012.12UBUNTU-CVE-2026-64266

Affected products (as reported)

VendorProductVersions
Linux Linux c3021629a0d820247ee12b6c5192a1d5380e21c6 – before 1f9156714592356b4fda57beac7eab9c2a462dd3c3021629a0d820247ee12b6c5192a1d5380e21c6 – before 5630da218a45ba80f0aba0846cbe8aa655da122bc3021629a0d820247ee12b6c5192a1d5380e21c6 – before 1ca605cfa59377f0143fb35b5b01360f37d1b7c4c3021629a0d820247ee12b6c5192a1d5380e21c6 – before 0e4a5a000123d81234e27a2f8187688cf608f755c3021629a0d820247ee12b6c5192a1d5380e21c6 – before e6aa539720c3d8def69683ed0c07cf9faea4e8bec3021629a0d820247ee12b6c5192a1d5380e21c6 – before be353caffa8640f5e25fb3714ce8b0cef5e410e5c3021629a0d820247ee12b6c5192a1d5380e21c6 – before 65a1c2551f7e16085acbb54aedde1feaa559ba7ac3021629a0d820247ee12b6c5192a1d5380e21c6 – before b5befa80fdbe287a98480effed9564712924add5
Linux Linux 2.6.35

Weakness: CWE-362 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References