{"id":"CVE-2026-89717","revision":null,"records":[{"revision":"008ec55f1ee749a8a52f9ae68778ce0d","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-89717","aliases":[],"title":"zram: set default primary compressor in zram_destroy_comps()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nzram: set default primary compressor in zram_destroy_comps()\n\nPatch series \"zram: fix zram issues reported by sashiko\".\n\nSashiko drove by and reported [1] a couple of zram issues:\na possible BUG_ON() in zlib code due to missing winbits range\nvalidation and one possible NULL-ptr dereference in zcomp.\nBoth are low risk yet still worth fixing.\n\n\nThis patch (of 2):\n\nzram_destroy_comps() resets all compressors and leaves them set to NULL,\nincluding the primary one, which is invalid device state, as now\ncomp_algorithm_show()->strcmp() can be called on a NULL compressor. Set\ndefault primary compressor in zram_destroy_comps().","state":0,"publishedAt":"2026-09-11T19:46:30.698+00:00","modifiedAt":"2026-10-21T12:48:28.119+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/block/zram/zram_drv.c\"\n ],\n \"versions\": [\n {\n \"version\": \"6e20720b12299595154857fa98222729f0d5823c\",\n \"lessThan\": \"a5fda7def04d98ab7c5cbb2394714fb1f8c56cb5\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"486fd58af7ac1098b68370b1d4d9f94a2a1c7124\",\n \"lessThan\": \"4bf3328eeec9afc2a55632ff47fc18101ea62d73\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"486fd58af7ac1098b68370b1d4d9f94a2a1c7124\",\n \"lessThan\": \"5cec3e60e9f2d1324179df3aa91656f90095cf8f\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"486fd58af7ac1098b68370b1d4d9f94a2a1c7124\",\n \"lessThan\": \"dea8f13c3dfad8b990f8ea96c997aabeebbc1d22\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"486fd58af7ac1098b68370b1d4d9f94a2a1c7124\",\n \"lessThan\": \"dde75313eed0b014c437f48dd75c0308b592cbf9\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"c4e5683c3031a33dc46954e99d37cbd2f706cdb6\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"6.6.57\",\n \"lessThan\": \"6.6.160\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.11.4\",\n \"lessThan\": \"6.12\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/block/zram/zram_drv.c\"\n ],\n \"versions\": [\n {\n \"version\": \"6.12\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"6.12\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.160\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.111\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.51\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.2.4\",\n \"lessThanOrEqual\": \"7.2.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.3\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/a5fda7def04d98ab7c5cbb2394714fb1f8c56cb5","https://git.kernel.org/stable/c/4bf3328eeec9afc2a55632ff47fc18101ea62d73","https://git.kernel.org/stable/c/5cec3e60e9f2d1324179df3aa91656f90095cf8f","https://git.kernel.org/stable/c/dea8f13c3dfad8b990f8ea96c997aabeebbc1d22","https://git.kernel.org/stable/c/dde75313eed0b014c437f48dd75c0308b592cbf9"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89717","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-89717","identifiers":["CVE-2026-89717"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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