Vulnerability · Published Jun 25, 2026 · Assigned by Linux

CVE-2026-53185zram: fix use-after-free in zram_bvec_write_partial()

High 7.8

In plain English

A high-severity security flaw 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 1% 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 98.9% 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: zram: fix use-after-free in zram_bvec_write_partial() zram_read_page() picks the sync or async backing device read path based on whether the parent bio is NULL. zram_bvec_write_partial() passes its parent bio down, so for ZRAM_WB slots the read is dispatched asynchronously and zram_read_page() returns 0 while the bio is still in flight. The caller then runs memcpy_from_bvec(), zram_write_page() and __free_page() on the buffer, leaving the async read to write into a freed page. zram_bvec_read_partial() was switched to NULL in commit 4e3c87b9421d ("zram: fix synchronous reads") for the same reason; the write_partial counterpart was missed.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8bpftool4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:10kernel6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-64k6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-64k5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-64k-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-64k-core5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-64k-debug6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-64k-debug5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-64k-debug-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-64k-debug-core5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-64k-debug-devel6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-64k-debug-devel5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-64k-debug-devel-matched6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-64k-debug-devel-matched5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-64k-debug-modules6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-64k-debug-modules5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-64k-debug-modules-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-64k-debug-modules-core5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-64k-debug-modules-extra6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-64k-debug-modules-extra5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-64k-devel6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-64k-devel5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-64k-devel-matched6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-64k-devel-matched5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-64k-modules6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-64k-modules5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-64k-modules-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-64k-modules-core5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-64k-modules-extra6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-64k-modules-extra5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-abi-stablelists6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-abi-stablelists4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-abi-stablelists5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-core4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-core5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-cross-headers6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-cross-headers4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-cross-headers5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-debug6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-debug4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-debug5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-debug-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-debug-core4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-debug-core5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-debug-devel6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-debug-devel4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-debug-devel5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-debug-devel-matched6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-debug-devel-matched5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-debug-modules6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-debug-modules4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-debug-modules5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-debug-modules-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-debug-modules-core5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-debug-modules-extra6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-debug-modules-extra4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-debug-modules-extra5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-debug-uki-virt6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-debug-uki-virt5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-devel6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-devel4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-devel5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-devel-matched6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-devel-matched5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-doc6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-doc4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-doc5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-headers6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-headers4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-headers5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-modules6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-modules4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-modules5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-modules-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-modules-core5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-modules-extra6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-modules-extra4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-modules-extra5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-modules-extra-matched6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-rt6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-rt4.18.0-553.159.1.rt7.500.el8_10ALSA-2026:63013
AlmaLinux:9kernel-rt5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-64k6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-rt-64k5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-64k-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-rt-64k-core5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-64k-debug6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-rt-64k-debug5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-64k-debug-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-rt-64k-debug-core5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-64k-debug-devel6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-rt-64k-debug-devel5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-64k-debug-modules6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-rt-64k-debug-modules5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-64k-debug-modules-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-rt-64k-debug-modules-core5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-64k-debug-modules-extra6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-rt-64k-debug-modules-extra5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-64k-devel6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-rt-64k-devel5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-64k-modules6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-rt-64k-modules5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-64k-modules-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-rt-64k-modules-core5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-64k-modules-extra6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-rt-64k-modules-extra5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-rt-core4.18.0-553.159.1.rt7.500.el8_10ALSA-2026:63013
AlmaLinux:9kernel-rt-core5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-debug6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-rt-debug4.18.0-553.159.1.rt7.500.el8_10ALSA-2026:63013
AlmaLinux:9kernel-rt-debug5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-debug-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-rt-debug-core4.18.0-553.159.1.rt7.500.el8_10ALSA-2026:63013
AlmaLinux:9kernel-rt-debug-core5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-debug-devel6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-rt-debug-devel4.18.0-553.159.1.rt7.500.el8_10ALSA-2026:63013
AlmaLinux:9kernel-rt-debug-devel5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-debug-modules6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-rt-debug-modules4.18.0-553.159.1.rt7.500.el8_10ALSA-2026:63013
AlmaLinux:9kernel-rt-debug-modules5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-debug-modules-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-rt-debug-modules-core5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-debug-modules-extra6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-rt-debug-modules-extra4.18.0-553.159.1.rt7.500.el8_10ALSA-2026:63013
AlmaLinux:9kernel-rt-debug-modules-extra5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-devel6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-rt-devel4.18.0-553.159.1.rt7.500.el8_10ALSA-2026:63013
AlmaLinux:9kernel-rt-devel5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-modules6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-rt-modules4.18.0-553.159.1.rt7.500.el8_10ALSA-2026:63013
AlmaLinux:9kernel-rt-modules5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-modules-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-rt-modules-core5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-modules-extra6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-rt-modules-extra4.18.0-553.159.1.rt7.500.el8_10ALSA-2026:63013
AlmaLinux:9kernel-rt-modules-extra5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-tools6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-tools4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-tools5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-tools-libs6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-tools-libs4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-tools-libs5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-tools-libs-devel6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-tools-libs-devel4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-tools-libs-devel5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-uki-virt6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-uki-virt5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-uki-virt-addons6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-uki-virt-addons5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-zfcpdump6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-zfcpdump4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-zfcpdump5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-zfcpdump-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-zfcpdump-core4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-zfcpdump-core5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-zfcpdump-devel6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-zfcpdump-devel4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-zfcpdump-devel5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-zfcpdump-devel-matched6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-zfcpdump-devel-matched5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-zfcpdump-modules6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-zfcpdump-modules4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-zfcpdump-modules5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-zfcpdump-modules-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-zfcpdump-modules-core5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-zfcpdump-modules-extra6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-zfcpdump-modules-extra4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-zfcpdump-modules-extra5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10libperf6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9libperf5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10perf6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8perf4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9perf5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10python3-perf6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8python3-perf4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9python3-perf5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10rtla6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9rtla5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10rv6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9rv5.14.0-687.42.1.el9_8ALSA-2026:59723
Debian:12linuxno fix listedDEBIAN-CVE-2026-53185
Debian:13linux6.12.94-1DEBIAN-CVE-2026-53185
Debian:14linux7.0.13-1DEBIAN-CVE-2026-53185
Rocky Linux:10kernel0:6.12.0-211.50.1.el10_2RLSA-2026:61887
Rocky Linux:8kernel0:4.18.0-553.159.1.el8_10RLSA-2026:63014
Rocky Linux:9kernel0:5.14.0-687.42.1.el9_8RLSA-2026:59723
Rocky Linux:8kernel-rt0:4.18.0-553.159.1.rt7.500.el8_10RLSA-2026:63013
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2026-53185
Ubuntu:24.04:LTSlinux6.8.0-146.146UBUNTU-CVE-2026-53185
Ubuntu:25.10linuxno fix listedUBUNTU-CVE-2026-53185
Ubuntu:26.04:LTSlinux7.0.0-31.31UBUNTU-CVE-2026-53185
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-53185
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-53185
Ubuntu:24.04:LTSlinux-aws6.8.0-1066.69UBUNTU-CVE-2026-53185
Ubuntu:25.10linux-awsno fix listedUBUNTU-CVE-2026-53185
Ubuntu:26.04:LTSlinux-aws7.0.0-1012.12UBUNTU-CVE-2026-53185

Affected products (as reported)

VendorProductVersions
Linux Linux 8e654f8fbff52ac483fb69957222853d7e2fc588 – before 0c2821665ff71be3f4b07ecece384669f2877f6a8e654f8fbff52ac483fb69957222853d7e2fc588 – before 77a602b505ce4802915853cfc435a4722fab3e648e654f8fbff52ac483fb69957222853d7e2fc588 – before c96786d6ff1acc1d54d9241e97767554c1dfdd5b8e654f8fbff52ac483fb69957222853d7e2fc588 – before 198b5a14cca27263b9c14b20114c8092de15dfcb8e654f8fbff52ac483fb69957222853d7e2fc588 – before 732fd9f0b9c1cdc6dfd77162ded60df005182cc0
Linux Linux 4.14

Weakness: CWE-364 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References