{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89717", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.752Z", "datePublished": "2026-09-11T19:46:30.698Z", "dateUpdated": "2026-09-11T19:46:30.698Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-11T19:46:30.698Z"}, "descriptions": [{"lang": "en", "value": "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()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/block/zram/zram_drv.c"], "versions": [{"version": "486fd58af7ac1098b68370b1d4d9f94a2a1c7124", "lessThan": "5cec3e60e9f2d1324179df3aa91656f90095cf8f", "status": "affected", "versionType": "git"}, {"version": "486fd58af7ac1098b68370b1d4d9f94a2a1c7124", "lessThan": "dea8f13c3dfad8b990f8ea96c997aabeebbc1d22", "status": "affected", "versionType": "git"}, {"version": "486fd58af7ac1098b68370b1d4d9f94a2a1c7124", "lessThan": "dde75313eed0b014c437f48dd75c0308b592cbf9", "status": "affected", "versionType": "git"}, {"version": "6e20720b12299595154857fa98222729f0d5823c", "status": "affected", "versionType": "git"}, {"version": "c4e5683c3031a33dc46954e99d37cbd2f706cdb6", "status": "affected", "versionType": "git"}, {"version": "6.6.57", "lessThan": "6.7", "status": "affected", "versionType": "semver"}, {"version": "6.11.4", "lessThan": "6.12", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/block/zram/zram_drv.c"], "versions": [{"version": "6.12", "status": "affected"}, {"version": "0", "lessThan": "6.12", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.51", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3-rc1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.18.51"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "7.3-rc1"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.57"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11.4"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/5cec3e60e9f2d1324179df3aa91656f90095cf8f"}, {"url": "https://git.kernel.org/stable/c/dea8f13c3dfad8b990f8ea96c997aabeebbc1d22"}, {"url": "https://git.kernel.org/stable/c/dde75313eed0b014c437f48dd75c0308b592cbf9"}], "title": "zram: set default primary compressor in zram_destroy_comps()", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/block/zram/zram_drv.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "5cec3e60e9f2d1324179df3aa91656f90095cf8f", "status": "affected", "version": "486fd58af7ac1098b68370b1d4d9f94a2a1c7124", "versionType": "git"}, {"lessThan": "dea8f13c3dfad8b990f8ea96c997aabeebbc1d22", "status": "affected", "version": "486fd58af7ac1098b68370b1d4d9f94a2a1c7124", "versionType": "git"}, {"lessThan": "dde75313eed0b014c437f48dd75c0308b592cbf9", "status": "affected", "version": "486fd58af7ac1098b68370b1d4d9f94a2a1c7124", "versionType": "git"}, {"status": "affected", "version": "6e20720b12299595154857fa98222729f0d5823c", "versionType": "git"}, {"status": "affected", "version": "c4e5683c3031a33dc46954e99d37cbd2f706cdb6", "versionType": "git"}, {"lessThan": "6.7", "status": "affected", "version": "6.6.57", "versionType": "semver"}, {"lessThan": "6.12", "status": "affected", "version": "6.11.4", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/block/zram/zram_drv.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.12"}, {"lessThan": "6.12", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.51", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3-rc1", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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()."}], "id": "CVE-2026-89717", "lastModified": "2026-09-11T20:19:59.233", "metrics": {}, "published": "2026-09-11T20:19:59.233", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5cec3e60e9f2d1324179df3aa91656f90095cf8f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dde75313eed0b014c437f48dd75c0308b592cbf9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dea8f13c3dfad8b990f8ea96c997aabeebbc1d22"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: zram: NULL pointer dereference due to invalid compressor state", "id": "2532278", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532278"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["A flaw was found in the zram component of the Linux kernel. When zram_destroy_comps() is called, it incorrectly resets the primary compressor to a NULL state. This invalid state can lead to a NULL pointer dereference when comp_algorithm_show() attempts to access the compressor, potentially causing system instability or a denial of service. This issue is considered low risk."], "name": "CVE-2026-89717", "public_date": "2026-09-11T19:46:30Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89717\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89717\nhttps://git.kernel.org/stable/c/5cec3e60e9f2d1324179df3aa91656f90095cf8f\nhttps://git.kernel.org/stable/c/dde75313eed0b014c437f48dd75c0308b592cbf9\nhttps://git.kernel.org/stable/c/dea8f13c3dfad8b990f8ea96c997aabeebbc1d22"], "threat_severity": "Moderate"}

{}