{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89716", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.751Z", "datePublished": "2026-09-11T19:46:29.953Z", "dateUpdated": "2026-09-11T19:46:29.953Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-11T19:46:29.953Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nzram: validate deflate params\n\nWe must validate user-supplied deflate winbits before we pass it to\nzlib_deflate_workspacesize(), which triggers BUG_ON() if winbits value is\noutside of valid ranges."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/block/zram/backend_deflate.c"], "versions": [{"version": "dc75a0d93bd5a1c64104efb4ec680463afbdd755", "lessThan": "923578d0f0d0703c3db61ab35dc37075ae53b0bd", "status": "affected", "versionType": "git"}, {"version": "dc75a0d93bd5a1c64104efb4ec680463afbdd755", "lessThan": "e23fac4ab2a5728386477b98a402a1042b21bffb", "status": "affected", "versionType": "git"}, {"version": "dc75a0d93bd5a1c64104efb4ec680463afbdd755", "lessThan": "ec7607ac4717ff521c9c1e9d8271c26293345513", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/block/zram/backend_deflate.c"], "versions": [{"version": "6.16", "status": "affected"}, {"version": "0", "lessThan": "6.16", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "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": "6.16", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "7.3-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/923578d0f0d0703c3db61ab35dc37075ae53b0bd"}, {"url": "https://git.kernel.org/stable/c/e23fac4ab2a5728386477b98a402a1042b21bffb"}, {"url": "https://git.kernel.org/stable/c/ec7607ac4717ff521c9c1e9d8271c26293345513"}], "title": "zram: validate deflate params", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/block/zram/backend_deflate.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "923578d0f0d0703c3db61ab35dc37075ae53b0bd", "status": "affected", "version": "dc75a0d93bd5a1c64104efb4ec680463afbdd755", "versionType": "git"}, {"lessThan": "e23fac4ab2a5728386477b98a402a1042b21bffb", "status": "affected", "version": "dc75a0d93bd5a1c64104efb4ec680463afbdd755", "versionType": "git"}, {"lessThan": "ec7607ac4717ff521c9c1e9d8271c26293345513", "status": "affected", "version": "dc75a0d93bd5a1c64104efb4ec680463afbdd755", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/block/zram/backend_deflate.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.16"}, {"lessThan": "6.16", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.50", "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: validate deflate params\n\nWe must validate user-supplied deflate winbits before we pass it to\nzlib_deflate_workspacesize(), which triggers BUG_ON() if winbits value is\noutside of valid ranges."}], "id": "CVE-2026-89716", "lastModified": "2026-09-11T20:19:59.123", "metrics": {}, "published": "2026-09-11T20:19:59.123", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/923578d0f0d0703c3db61ab35dc37075ae53b0bd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e23fac4ab2a5728386477b98a402a1042b21bffb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ec7607ac4717ff521c9c1e9d8271c26293345513"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel zram: Denial of Service due to improper deflate parameter validation", "id": "2532456", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532456"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-617", "details": ["A flaw was found in the zram component of the Linux kernel. This vulnerability occurs because the system does not properly validate user-supplied deflate parameters, specifically `winbits` values. An attacker could exploit this by providing malformed input, which would trigger an internal error (`BUG_ON()`) and lead to a system crash, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-89716", "public_date": "2026-09-11T19:46:29Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89716\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89716\nhttps://git.kernel.org/stable/c/923578d0f0d0703c3db61ab35dc37075ae53b0bd\nhttps://git.kernel.org/stable/c/e23fac4ab2a5728386477b98a402a1042b21bffb\nhttps://git.kernel.org/stable/c/ec7607ac4717ff521c9c1e9d8271c26293345513"], "threat_severity": "Moderate"}

{"created": "2026-09-12T10:00:08.635338+00:00", "updated": "2026-09-12T10:00:08.635345+00:00", "vendors": [], "weaknesses": ["CWE-20"]}