CVE-2026-98635

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98635", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.361Z", "datePublished": "2026-10-18T15:20:05.961Z", "dateUpdated": "2026-10-19T09:23:04.703Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:23:04.703Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: block: Fix zones_cond out-of-bounds write on zone report\n\nblk_revalidate_disk_zones() sizes the zones_cond array from the disk\ncapacity and zone size, but the index used by blk_revalidate_zone_cond()\ncomes from the device-driven report_zones() walk and is never checked\nagainst the array size. A device reporting more zones than fit the array\nmakes blk_zone_set_cond() write out of bounds.\n\nOne way to reach this is a zone count exceeding 32 bits: both\nblk_revalidate_zone_args.nr_zones and struct zoned_disk_info.nr_zones are\nunsigned int, so a disk advertising more than UINT_MAX zones (e.g. 2^32 +\n1024 zones of one 512-byte logical block) gets its zone count truncated to\na small value, undersizing the array while the report walk keeps counting\nupward.\n\nCheck the index against the array size before storing the zone condition,\nand refuse to revalidate when the zone count does not fit 32 bits."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["block/blk-zoned.c"], "versions": [{"version": "6e945ffb6555705cf20b1fcdc21a139911562995", "lessThan": "ca688bb207957cffa5a8cad207329b0dcac1f2c0", "status": "affected", "versionType": "git"}, {"version": "6e945ffb6555705cf20b1fcdc21a139911562995", "lessThan": "7c431d61b69a3fd0784c20aa4cd0b8fb501b5653", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["block/blk-zoned.c"], "versions": [{"version": "6.19", "status": "affected"}, {"version": "0", "lessThan": "6.19", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.9", "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": "6.19", "versionEndExcluding": "7.2.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ca688bb207957cffa5a8cad207329b0dcac1f2c0"}, {"url": "https://git.kernel.org/stable/c/7c431d61b69a3fd0784c20aa4cd0b8fb501b5653"}], "title": "scsi: block: Fix zones_cond out-of-bounds write on zone report", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["block/blk-zoned.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "ca688bb207957cffa5a8cad207329b0dcac1f2c0", "status": "affected", "version": "6e945ffb6555705cf20b1fcdc21a139911562995", "versionType": "git"}, {"lessThan": "7c431d61b69a3fd0784c20aa4cd0b8fb501b5653", "status": "affected", "version": "6e945ffb6555705cf20b1fcdc21a139911562995", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["block/blk-zoned.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.19"}, {"lessThan": "6.19", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.9", "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\nscsi: block: Fix zones_cond out-of-bounds write on zone report\n\nblk_revalidate_disk_zones() sizes the zones_cond array from the disk\ncapacity and zone size, but the index used by blk_revalidate_zone_cond()\ncomes from the device-driven report_zones() walk and is never checked\nagainst the array size. A device reporting more zones than fit the array\nmakes blk_zone_set_cond() write out of bounds.\n\nOne way to reach this is a zone count exceeding 32 bits: both\nblk_revalidate_zone_args.nr_zones and struct zoned_disk_info.nr_zones are\nunsigned int, so a disk advertising more than UINT_MAX zones (e.g. 2^32 +\n1024 zones of one 512-byte logical block) gets its zone count truncated to\na small value, undersizing the array while the report walk keeps counting\nupward.\n\nCheck the index against the array size before storing the zone condition,\nand refuse to revalidate when the zone count does not fit 32 bits."}], "id": "CVE-2026-98635", "lastModified": "2026-10-19T10:19:27.747", "metrics": {}, "published": "2026-10-18T16:17:16.607", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7c431d61b69a3fd0784c20aa4cd0b8fb501b5653"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ca688bb207957cffa5a8cad207329b0dcac1f2c0"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: scsi: block: Fix zones_cond out-of-bounds write on zone report", "id": "2554929", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2554929"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.2", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nscsi: block: Fix zones_cond out-of-bounds write on zone report\nblk_revalidate_disk_zones() sizes the zones_cond array from the disk\ncapacity and zone size, but the index used by blk_revalidate_zone_cond()\ncomes from the device-driven report_zones() walk and is never checked\nagainst the array size. A device reporting more zones than fit the array\nmakes blk_zone_set_cond() write out of bounds.\nOne way to reach this is a zone count exceeding 32 bits: both\nblk_revalidate_zone_args.nr_zones and struct zoned_disk_info.nr_zones are\nunsigned int, so a disk advertising more than UINT_MAX zones (e.g. 2^32 +\n1024 zones of one 512-byte logical block) gets its zone count truncated to\na small value, undersizing the array while the report walk keeps counting\nupward.\nCheck the index against the array size before storing the zone condition,\nand refuse to revalidate when the zone count does not fit 32 bits.", "A flaw was found in the Linux kernel. An attacker who attaches a specially crafted storage device can cause a Denial of Service (DoS) or kernel memory corruption. When the kernel revalidates zoned block devices\u2014storage media divided into independent physical regions\u2014it fails to verify that the reported zone index fits within the allocated memory buffer. This issue triggers an out-of-bounds write operation, leading to system instability or a kernel crash."], "name": "CVE-2026-98635", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98635\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98635\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98635.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6e945ffb6555705cf20b1fcdc21a139911562995,ca688bb207957cffa5a8cad207329b0dcac1f2c0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6e945ffb6555705cf20b1fcdc21a139911562995,7c431d61b69a3fd0784c20aa4cd0b8fb501b5653)"}}], "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": "6.19"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.19)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.9,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,*]"}}], "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": "2026-10-18T18:15:15.189483+00:00", "updated": "2026-10-23T07:00:17.011503+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}