CVE-2026-98953

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98953", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.382Z", "datePublished": "2026-10-23T12:19:13.015Z", "dateUpdated": "2026-10-23T12:19:13.015Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-23T12:19:13.015Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndevlink: fix devlink_rel reference leak when notify work is pending\n\ndevlink_rel_nested_in_notify_work_schedule() takes a reference on the\ndevlink_rel for the notify work and then queues the work, ignoring the\nreturn value of schedule_delayed_work(). If the work is already pending,\nnothing new is queued, the work runs only once and drops only one\nreference, so the extra one is leaked together with the devlink_rel and\nits index in devlink_rels.\n\nThis is easy to hit. devl_register() of a nested instance queues the\nwork, and if the instance is unregistered before the work has run,\ndevlink_rel_put() queues it again while it is still pending. The work\nalso keeps rescheduling itself for as long as the parent devlink lock\ncannot be taken, which widens the window. Registering and unregistering\na nested devlink instance 100 times while holding the parent lock leaks\nall 100 devlink_rel objects.\n\nThe reschedule path in devlink_rel_nested_in_notify_work() has the same\nproblem: if the work was queued again while it was running, the\nreference it holds is never dropped.\n\nDrop the reference in both places when the work was already pending.\nThe pending work holds its own reference, so this can not be the last\none."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/devlink/core.c"], "versions": [{"version": "c137743bce02b18c1537d4681aa515f7b80bf0a8", "lessThan": "8c7830e0120e6e1f5084212fd5b79b3092496f87", "status": "affected", "versionType": "git"}, {"version": "c137743bce02b18c1537d4681aa515f7b80bf0a8", "lessThan": "8de57bfec3825effb57fe4d25da98ec3b8fda4c6", "status": "affected", "versionType": "git"}, {"version": "c137743bce02b18c1537d4681aa515f7b80bf0a8", "lessThan": "dc2e787b5fb474241c8a6d18fdacb44adc6d571f", "status": "affected", "versionType": "git"}, {"version": "c137743bce02b18c1537d4681aa515f7b80bf0a8", "lessThan": "c5381ae1cd1481cc431c2bd79460472c6f1d3ce3", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/devlink/core.c"], "versions": [{"version": "6.7", "status": "affected"}, {"version": "0", "lessThan": "6.7", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.113", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.57", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.11", "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": "6.7", "versionEndExcluding": "6.12.113"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.18.57"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "7.2.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/8c7830e0120e6e1f5084212fd5b79b3092496f87"}, {"url": "https://git.kernel.org/stable/c/8de57bfec3825effb57fe4d25da98ec3b8fda4c6"}, {"url": "https://git.kernel.org/stable/c/dc2e787b5fb474241c8a6d18fdacb44adc6d571f"}, {"url": "https://git.kernel.org/stable/c/c5381ae1cd1481cc431c2bd79460472c6f1d3ce3"}], "title": "devlink: fix devlink_rel reference leak when notify work is pending", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/devlink/core.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "8c7830e0120e6e1f5084212fd5b79b3092496f87", "status": "affected", "version": "c137743bce02b18c1537d4681aa515f7b80bf0a8", "versionType": "git"}, {"lessThan": "8de57bfec3825effb57fe4d25da98ec3b8fda4c6", "status": "affected", "version": "c137743bce02b18c1537d4681aa515f7b80bf0a8", "versionType": "git"}, {"lessThan": "dc2e787b5fb474241c8a6d18fdacb44adc6d571f", "status": "affected", "version": "c137743bce02b18c1537d4681aa515f7b80bf0a8", "versionType": "git"}, {"lessThan": "c5381ae1cd1481cc431c2bd79460472c6f1d3ce3", "status": "affected", "version": "c137743bce02b18c1537d4681aa515f7b80bf0a8", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/devlink/core.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.7"}, {"lessThan": "6.7", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.113", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.57", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.11", "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\ndevlink: fix devlink_rel reference leak when notify work is pending\n\ndevlink_rel_nested_in_notify_work_schedule() takes a reference on the\ndevlink_rel for the notify work and then queues the work, ignoring the\nreturn value of schedule_delayed_work(). If the work is already pending,\nnothing new is queued, the work runs only once and drops only one\nreference, so the extra one is leaked together with the devlink_rel and\nits index in devlink_rels.\n\nThis is easy to hit. devl_register() of a nested instance queues the\nwork, and if the instance is unregistered before the work has run,\ndevlink_rel_put() queues it again while it is still pending. The work\nalso keeps rescheduling itself for as long as the parent devlink lock\ncannot be taken, which widens the window. Registering and unregistering\na nested devlink instance 100 times while holding the parent lock leaks\nall 100 devlink_rel objects.\n\nThe reschedule path in devlink_rel_nested_in_notify_work() has the same\nproblem: if the work was queued again while it was running, the\nreference it holds is never dropped.\n\nDrop the reference in both places when the work was already pending.\nThe pending work holds its own reference, so this can not be the last\none."}], "id": "CVE-2026-98953", "lastModified": "2026-10-23T13:17:16.480", "metrics": {}, "published": "2026-10-23T13:17:16.480", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8c7830e0120e6e1f5084212fd5b79b3092496f87"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8de57bfec3825effb57fe4d25da98ec3b8fda4c6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c5381ae1cd1481cc431c2bd79460472c6f1d3ce3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dc2e787b5fb474241c8a6d18fdacb44adc6d571f"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: devlink: fix devlink_rel reference leak when notify work is pending", "id": "2559632", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2559632"}, "csaw": false, "cvss3": {"cvss3_base_score": "3.3", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L", "status": "draft"}, "cwe": "CWE-911", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ndevlink: fix devlink_rel reference leak when notify work is pending\ndevlink_rel_nested_in_notify_work_schedule() takes a reference on the\ndevlink_rel for the notify work and then queues the work, ignoring the\nreturn value of schedule_delayed_work(). If the work is already pending,\nnothing new is queued, the work runs only once and drops only one\nreference, so the extra one is leaked together with the devlink_rel and\nits index in devlink_rels.\nThis is easy to hit. devl_register() of a nested instance queues the\nwork, and if the instance is unregistered before the work has run,\ndevlink_rel_put() queues it again while it is still pending. The work\nalso keeps rescheduling itself for as long as the parent devlink lock\ncannot be taken, which widens the window. Registering and unregistering\na nested devlink instance 100 times while holding the parent lock leaks\nall 100 devlink_rel objects.\nThe reschedule path in devlink_rel_nested_in_notify_work() has the same\nproblem: if the work was queued again while it was running, the\nreference it holds is never dropped.\nDrop the reference in both places when the work was already pending.\nThe pending work holds its own reference, so this can not be the last\none.", "A flaw was found in the Linux kernel's devlink subsystem. An improper reference count management issue occurs when scheduling notification work for nested devlink instances that are already pending. A local user could exploit this flaw by repeatedly registering and unregistering nested devlink instances, causing a memory leak that can lead to resource exhaustion and a Denial of Service (DoS)."], "name": "CVE-2026-98953", "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": "Fix deferred", "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": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-23T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98953\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98953\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98953.mbox"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c137743bce02b18c1537d4681aa515f7b80bf0a8,8c7830e0120e6e1f5084212fd5b79b3092496f87)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c137743bce02b18c1537d4681aa515f7b80bf0a8,8de57bfec3825effb57fe4d25da98ec3b8fda4c6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c137743bce02b18c1537d4681aa515f7b80bf0a8,dc2e787b5fb474241c8a6d18fdacb44adc6d571f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c137743bce02b18c1537d4681aa515f7b80bf0a8,c5381ae1cd1481cc431c2bd79460472c6f1d3ce3)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "6.7"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.7)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.113,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.57,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.11,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.3,*]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c137743bce02b18c1537d4681aa515f7b80bf0a8,8c7830e0120e6e1f5084212fd5b79b3092496f87)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c137743bce02b18c1537d4681aa515f7b80bf0a8,8de57bfec3825effb57fe4d25da98ec3b8fda4c6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c137743bce02b18c1537d4681aa515f7b80bf0a8,dc2e787b5fb474241c8a6d18fdacb44adc6d571f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c137743bce02b18c1537d4681aa515f7b80bf0a8,c5381ae1cd1481cc431c2bd79460472c6f1d3ce3)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"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": "6.7"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.7)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.113,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.57,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.11,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.3,*]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-10-23T18:00:13.525067+00:00", "updated": "2026-10-29T23:00:06.201507+00:00", "vendors": ["linux", "linux$PRODUCT$linux", "linux$PRODUCT$linux_kernel"]}