CVE-2026-89597

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89597", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.731Z", "datePublished": "2026-09-11T19:44:59.538Z", "dateUpdated": "2026-10-19T08:49:29.665Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:49:29.665Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfbdev: uvesafb: unregister connector callback on init failure\n\nuvesafb_init() registers the v86d connector callback before registering\nthe platform driver. If platform_driver_register() fails, the function\nreturns the error directly and leaves the connector callback registered.\n\nThe later platform-device failure path already unregisters the callback.\nAdd the same cleanup before the final return when platform-driver\nregistration fails.\n\nThis issue was identified during our ongoing static-analysis research while\nreviewing kernel code."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The leftover v86d connector callback is reached only via a local NETLINK_CONNECTOR socket: cn_rx_skb() -> cn_call_callback() invokes the registered handler. There is no remote packet, Bluetooth/WiFi, or USB path into this code.\nAC:L - Once platform_driver_register() fails, cn_add_callback() has already left uvesafb_cn_callback on the global connector list while free_module() unmaps the driver. A single NETLINK_CONNECTOR message with CN_IDX_V86D/CN_VAL_V86D_UVESAFB then calls that stale pointer with no race or other condition beyond the attacker's control.\nPR:L - Unprivileged users may create NETLINK_CONNECTOR sockets and send to kernel portid 0 without CAP_NET_ADMIN. The callback's capable(CAP_SYS_ADMIN) check never runs because the UAF occurs at the call through the freed module text, so init-namespace root is not required.\nUI:N - The attacker sends the netlink message from their own process. No separate victim action such as mounting a filesystem, opening a device node, or loading a module is required to hit the dangling callback.\nS:U - The stale function pointer and freed uvesafb module memory are kernel-side resources in the same security authority. This is local privilege escalation, not VM escape, IOMMU bypass, or another cross-boundary impact.\nC:H - The leftover cn_callback_entry still points at uvesafb_cn_callback in freed module text. That use-after-free lets an attacker reclaim the pages and obtain an arbitrary kernel read primitive.\nI:H - Calling through a function pointer that resides in freed module memory is a control-flow hijack once those pages are reallocated, giving an arbitrary write and code-execution primitive.\nA:H - Invoking the stale connector callback jumps into unmapped or reused module text and reliably oopses or panics the kernel even if the attacker does not fully exploit the UAF."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/video/fbdev/uvesafb.c"], "versions": [{"version": "8bdb3a2d7df48b861972c4bfb58490853a228f51", "lessThan": "b149f77d04082a9da75944cdc488becb0e35258f", "status": "affected", "versionType": "git"}, {"version": "8bdb3a2d7df48b861972c4bfb58490853a228f51", "lessThan": "0352fdac3cbf11e3b323322ff8cd95e20cbf5cd7", "status": "affected", "versionType": "git"}, {"version": "8bdb3a2d7df48b861972c4bfb58490853a228f51", "lessThan": "17518e7123f7ef01b1155064dc01f2087583908e", "status": "affected", "versionType": "git"}, {"version": "8bdb3a2d7df48b861972c4bfb58490853a228f51", "lessThan": "9eb7b3cbe99c9c0edbff69eb155c723e30983c22", "status": "affected", "versionType": "git"}, {"version": "8bdb3a2d7df48b861972c4bfb58490853a228f51", "lessThan": "9f8a822b44c42502f105cf6574f4867067eecdd0", "status": "affected", "versionType": "git"}, {"version": "8bdb3a2d7df48b861972c4bfb58490853a228f51", "lessThan": "466a8af0dee2cf745307155e26884e19a37b7e15", "status": "affected", "versionType": "git"}, {"version": "8bdb3a2d7df48b861972c4bfb58490853a228f51", "lessThan": "9e768ae51426af2034d479133cfd73010d641b1a", "status": "affected", "versionType": "git"}, {"version": "8bdb3a2d7df48b861972c4bfb58490853a228f51", "lessThan": "de8db23aa7c337e606fca9faf48b3ba72968597a", "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/video/fbdev/uvesafb.c"], "versions": [{"version": "2.6.24", "status": "affected"}, {"version": "0", "lessThan": "2.6.24", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.270", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.221", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.109", "lessThanOrEqual": "6.12.*", "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", "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": "2.6.24", "versionEndExcluding": "5.10.270"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.24", "versionEndExcluding": "5.15.221"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.24", "versionEndExcluding": "6.1.188"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.24", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.24", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.24", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.24", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.24", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/b149f77d04082a9da75944cdc488becb0e35258f"}, {"url": "https://git.kernel.org/stable/c/0352fdac3cbf11e3b323322ff8cd95e20cbf5cd7"}, {"url": "https://git.kernel.org/stable/c/17518e7123f7ef01b1155064dc01f2087583908e"}, {"url": "https://git.kernel.org/stable/c/9eb7b3cbe99c9c0edbff69eb155c723e30983c22"}, {"url": "https://git.kernel.org/stable/c/9f8a822b44c42502f105cf6574f4867067eecdd0"}, {"url": "https://git.kernel.org/stable/c/466a8af0dee2cf745307155e26884e19a37b7e15"}, {"url": "https://git.kernel.org/stable/c/9e768ae51426af2034d479133cfd73010d641b1a"}, {"url": "https://git.kernel.org/stable/c/de8db23aa7c337e606fca9faf48b3ba72968597a"}], "title": "fbdev: uvesafb: unregister connector callback on init failure", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/video/fbdev/uvesafb.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "b149f77d04082a9da75944cdc488becb0e35258f", "status": "affected", "version": "8bdb3a2d7df48b861972c4bfb58490853a228f51", "versionType": "git"}, {"lessThan": "0352fdac3cbf11e3b323322ff8cd95e20cbf5cd7", "status": "affected", "version": "8bdb3a2d7df48b861972c4bfb58490853a228f51", "versionType": "git"}, {"lessThan": "17518e7123f7ef01b1155064dc01f2087583908e", "status": "affected", "version": "8bdb3a2d7df48b861972c4bfb58490853a228f51", "versionType": "git"}, {"lessThan": "9eb7b3cbe99c9c0edbff69eb155c723e30983c22", "status": "affected", "version": "8bdb3a2d7df48b861972c4bfb58490853a228f51", "versionType": "git"}, {"lessThan": "9f8a822b44c42502f105cf6574f4867067eecdd0", "status": "affected", "version": "8bdb3a2d7df48b861972c4bfb58490853a228f51", "versionType": "git"}, {"lessThan": "466a8af0dee2cf745307155e26884e19a37b7e15", "status": "affected", "version": "8bdb3a2d7df48b861972c4bfb58490853a228f51", "versionType": "git"}, {"lessThan": "9e768ae51426af2034d479133cfd73010d641b1a", "status": "affected", "version": "8bdb3a2d7df48b861972c4bfb58490853a228f51", "versionType": "git"}, {"lessThan": "de8db23aa7c337e606fca9faf48b3ba72968597a", "status": "affected", "version": "8bdb3a2d7df48b861972c4bfb58490853a228f51", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/video/fbdev/uvesafb.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.24"}, {"lessThan": "2.6.24", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.270", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.221", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.188", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.157", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.109", "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", "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\nfbdev: uvesafb: unregister connector callback on init failure\n\nuvesafb_init() registers the v86d connector callback before registering\nthe platform driver. If platform_driver_register() fails, the function\nreturns the error directly and leaves the connector callback registered.\n\nThe later platform-device failure path already unregisters the callback.\nAdd the same cleanup before the final return when platform-driver\nregistration fails.\n\nThis issue was identified during our ongoing static-analysis research while\nreviewing kernel code."}], "id": "CVE-2026-89597", "lastModified": "2026-10-19T09:17:56.127", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-11T20:19:44.463", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0352fdac3cbf11e3b323322ff8cd95e20cbf5cd7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/17518e7123f7ef01b1155064dc01f2087583908e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/466a8af0dee2cf745307155e26884e19a37b7e15"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9e768ae51426af2034d479133cfd73010d641b1a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9eb7b3cbe99c9c0edbff69eb155c723e30983c22"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9f8a822b44c42502f105cf6574f4867067eecdd0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b149f77d04082a9da75944cdc488becb0e35258f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/de8db23aa7c337e606fca9faf48b3ba72968597a"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel uvesafb: Resource leak due to improper callback unregistration", "id": "2532247", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532247"}, "csaw": false, "cvss3": {"cvss3_base_score": "2.3", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L", "status": "draft"}, "cwe": "CWE-772", "details": ["A flaw was found in the `uvesafb` component of the Linux kernel. During the initialization process, if the platform driver fails to register, a connector callback is not properly unregistered. This oversight can lead to a resource leak, which may result in system instability or a denial of service (DoS) condition."], "name": "CVE-2026-89597", "public_date": "2026-09-11T19:44:59Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89597\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89597\nhttps://git.kernel.org/stable/c/466a8af0dee2cf745307155e26884e19a37b7e15\nhttps://git.kernel.org/stable/c/9e768ae51426af2034d479133cfd73010d641b1a\nhttps://git.kernel.org/stable/c/9f8a822b44c42502f105cf6574f4867067eecdd0\nhttps://git.kernel.org/stable/c/de8db23aa7c337e606fca9faf48b3ba72968597a"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8bdb3a2d7df48b861972c4bfb58490853a228f51,9f8a822b44c42502f105cf6574f4867067eecdd0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8bdb3a2d7df48b861972c4bfb58490853a228f51,466a8af0dee2cf745307155e26884e19a37b7e15)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8bdb3a2d7df48b861972c4bfb58490853a228f51,9e768ae51426af2034d479133cfd73010d641b1a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8bdb3a2d7df48b861972c4bfb58490853a228f51,de8db23aa7c337e606fca9faf48b3ba72968597a)"}}], "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": "semver", "value": "2.6.24"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,2.6.24)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.109,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.50,6.19.0)"}}, {"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": "2026-09-12T06:45:10.802157+00:00", "updated": "2026-09-15T21:30:16.440927+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}