CVE-2026-89719

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89719", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.752Z", "datePublished": "2026-09-11T19:46:32.185Z", "dateUpdated": "2026-10-30T12:32:51.769Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:32:51.769Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nzram: fix out-of-bounds access in read_block_state()\n\nread_block_state() calculates nr_pages before taking dev_lock. If the\ndevice is reset and reinitialized with a smaller disksize before lock\nacquisition, nr_pages still describes the old table. The subsequent loop\ncan then call slot_lock() past the end of the newly allocated table.\n\nRead disksize after acquiring dev_lock and checking that the device is\ninitialized. The read lock then keeps the table and its bound stable for\nthe duration of the scan."}], "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": "c0265342bff4fcaa2cdf13f4596244c18d4a7ae5", "lessThan": "fee53224c8261541cf310b57ac7c77a80e144483", "status": "affected", "versionType": "git"}, {"version": "c0265342bff4fcaa2cdf13f4596244c18d4a7ae5", "lessThan": "26a55336be91004dbd438f3b89b0c31617459976", "status": "affected", "versionType": "git"}, {"version": "c0265342bff4fcaa2cdf13f4596244c18d4a7ae5", "lessThan": "a189cae92e97d90a9553740f5558d6f74446d3d1", "status": "affected", "versionType": "git"}, {"version": "c0265342bff4fcaa2cdf13f4596244c18d4a7ae5", "lessThan": "f5e9f3a75efc774f17ab3f33826630d7fe30c7ea", "status": "affected", "versionType": "git"}, {"version": "c0265342bff4fcaa2cdf13f4596244c18d4a7ae5", "lessThan": "6d52c1f43ff39ea1ebf8f016e847677f0b60cf2b", "status": "affected", "versionType": "git"}, {"version": "c0265342bff4fcaa2cdf13f4596244c18d4a7ae5", "lessThan": "e7dbcb7a561a21e9a8f5b5fa90bb95aefbd0739d", "status": "affected", "versionType": "git"}, {"version": "c0265342bff4fcaa2cdf13f4596244c18d4a7ae5", "lessThan": "5e458fa714a55b6b64a9fe0c6d4fa609609f9ec3", "status": "affected", "versionType": "git"}, {"version": "c0265342bff4fcaa2cdf13f4596244c18d4a7ae5", "lessThan": "391f057f44a51cc9418da5cba78b014324174264", "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/zram_drv.c"], "versions": [{"version": "4.18", "status": "affected"}, {"version": "0", "lessThan": "4.18", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.273", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.224", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.111", "lessThanOrEqual": "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", "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": "4.18", "versionEndExcluding": "5.10.273"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "5.15.224"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "6.12.111"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "6.18.51"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/fee53224c8261541cf310b57ac7c77a80e144483"}, {"url": "https://git.kernel.org/stable/c/26a55336be91004dbd438f3b89b0c31617459976"}, {"url": "https://git.kernel.org/stable/c/a189cae92e97d90a9553740f5558d6f74446d3d1"}, {"url": "https://git.kernel.org/stable/c/f5e9f3a75efc774f17ab3f33826630d7fe30c7ea"}, {"url": "https://git.kernel.org/stable/c/6d52c1f43ff39ea1ebf8f016e847677f0b60cf2b"}, {"url": "https://git.kernel.org/stable/c/e7dbcb7a561a21e9a8f5b5fa90bb95aefbd0739d"}, {"url": "https://git.kernel.org/stable/c/5e458fa714a55b6b64a9fe0c6d4fa609609f9ec3"}, {"url": "https://git.kernel.org/stable/c/391f057f44a51cc9418da5cba78b014324174264"}], "title": "zram: fix out-of-bounds access in read_block_state()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"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": "fee53224c8261541cf310b57ac7c77a80e144483", "status": "affected", "version": "c0265342bff4fcaa2cdf13f4596244c18d4a7ae5", "versionType": "git"}, {"lessThan": "26a55336be91004dbd438f3b89b0c31617459976", "status": "affected", "version": "c0265342bff4fcaa2cdf13f4596244c18d4a7ae5", "versionType": "git"}, {"lessThan": "a189cae92e97d90a9553740f5558d6f74446d3d1", "status": "affected", "version": "c0265342bff4fcaa2cdf13f4596244c18d4a7ae5", "versionType": "git"}, {"lessThan": "f5e9f3a75efc774f17ab3f33826630d7fe30c7ea", "status": "affected", "version": "c0265342bff4fcaa2cdf13f4596244c18d4a7ae5", "versionType": "git"}, {"lessThan": "6d52c1f43ff39ea1ebf8f016e847677f0b60cf2b", "status": "affected", "version": "c0265342bff4fcaa2cdf13f4596244c18d4a7ae5", "versionType": "git"}, {"lessThan": "e7dbcb7a561a21e9a8f5b5fa90bb95aefbd0739d", "status": "affected", "version": "c0265342bff4fcaa2cdf13f4596244c18d4a7ae5", "versionType": "git"}, {"lessThan": "5e458fa714a55b6b64a9fe0c6d4fa609609f9ec3", "status": "affected", "version": "c0265342bff4fcaa2cdf13f4596244c18d4a7ae5", "versionType": "git"}, {"lessThan": "391f057f44a51cc9418da5cba78b014324174264", "status": "affected", "version": "c0265342bff4fcaa2cdf13f4596244c18d4a7ae5", "versionType": "git"}]}, {"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": "4.18"}, {"lessThan": "4.18", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.273", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.224", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.111", "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", "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: fix out-of-bounds access in read_block_state()\n\nread_block_state() calculates nr_pages before taking dev_lock. If the\ndevice is reset and reinitialized with a smaller disksize before lock\nacquisition, nr_pages still describes the old table. The subsequent loop\ncan then call slot_lock() past the end of the newly allocated table.\n\nRead disksize after acquiring dev_lock and checking that the device is\ninitialized. The read lock then keeps the table and its bound stable for\nthe duration of the scan."}], "id": "CVE-2026-89719", "lastModified": "2026-10-30T13:20:27.580", "metrics": {}, "published": "2026-09-11T20:20:00.820", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/26a55336be91004dbd438f3b89b0c31617459976"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/391f057f44a51cc9418da5cba78b014324174264"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5e458fa714a55b6b64a9fe0c6d4fa609609f9ec3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6d52c1f43ff39ea1ebf8f016e847677f0b60cf2b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a189cae92e97d90a9553740f5558d6f74446d3d1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e7dbcb7a561a21e9a8f5b5fa90bb95aefbd0739d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f5e9f3a75efc774f17ab3f33826630d7fe30c7ea"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fee53224c8261541cf310b57ac7c77a80e144483"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: zram out-of-bounds access leading to system instability", "id": "2532158", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532158"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.1", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-805", "details": ["A flaw was found in the Linux kernel's zram module. This vulnerability occurs when the `read_block_state()` function calculates the number of pages before acquiring a device lock. If the zram device is reset and reinitialized with a smaller disk size, the function can attempt to access memory beyond the bounds of the newly allocated table. This out-of-bounds access can lead to system instability or a denial of service (DoS)."], "name": "CVE-2026-89719", "public_date": "2026-09-11T19:46:32Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89719\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89719\nhttps://git.kernel.org/stable/c/391f057f44a51cc9418da5cba78b014324174264\nhttps://git.kernel.org/stable/c/5e458fa714a55b6b64a9fe0c6d4fa609609f9ec3\nhttps://git.kernel.org/stable/c/e7dbcb7a561a21e9a8f5b5fa90bb95aefbd0739d"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c0265342bff4fcaa2cdf13f4596244c18d4a7ae5,e7dbcb7a561a21e9a8f5b5fa90bb95aefbd0739d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c0265342bff4fcaa2cdf13f4596244c18d4a7ae5,5e458fa714a55b6b64a9fe0c6d4fa609609f9ec3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c0265342bff4fcaa2cdf13f4596244c18d4a7ae5,391f057f44a51cc9418da5cba78b014324174264)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "4.18"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.18)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.51,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.4,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-12T06:30:09.004083+00:00", "updated": "2026-09-15T19:30:12.145850+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}