CVE-2026-72109

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-72109", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.906Z", "datePublished": "2026-08-15T05:52:51.067Z", "dateUpdated": "2026-08-17T05:40:22.667Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:40:22.667Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: sparx5: unregister blocking notifier on init failure\n\nsparx5_register_notifier_blocks() registers the switchdev blocking\nnotifier before allocating the ordered workqueue. If the workqueue\nallocation fails, the error path unregisters the switchdev and netdevice\nnotifiers, but leaves the blocking notifier registered.\n\nAdd a separate error label for the workqueue allocation failure path and\nunregister the switchdev blocking notifier there."}], "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 - Exploitation reaches sparx5_switchdev_blocking_event through global switchdev blocking notifier callbacks fired by local bridge/VLAN/MDB configuration via rtnetlink, not by processing remote packets on Sparx5 switch ports.\nAC:L - After a sparx5 probe workqueue ENOMEM leaves the blocking notifier registered and devm frees sparx5, an attacker can reliably trigger call_switchdev_blocking_notifiers with ordinary bridge or VLAN netlink operations without uncontrollable races.\nPR:L - Triggering switchdev blocking events requires CAP_NET_ADMIN for bridge/VLAN changes; unprivileged users can obtain that capability in user/network namespaces and invoke the global notifier chain from their own bridge configuration.\nUI:N - No victim interaction is required beyond the attacker performing network administration operations; no user must open files, mount filesystems, or click anything to reach the stale notifier callback.\nS:U - The use-after-free corrupts kernel memory within the same kernel security authority on Sparx5/LAN969x switch platforms, enabling local privilege escalation but not VM escape or other cross-authority boundary bypass by itself.\nC:H - The leaked switchdev_blocking_nb remains on a global chain after devm frees the containing sparx5 structure; sparx5_switchdev_blocking_event dereferences it via container_of, creating a use-after-free that can disclose kernel memory.\nI:H - UAF callbacks such as sparx5_handle_port_vlan_add and MDB handlers dereference freed sparx5 state and can write through sparx5_mact_learn and related hardware programming, enabling memory corruption and potential arbitrary code execution.\nA:H - Dereferencing freed notifier_block and sparx5 structures during global switchdev blocking events can cause kernel oops, panic, or hang, disrupting availability on enterprise, industrial, and automotive Sparx5-managed switch systems."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/microchip/sparx5/sparx5_switchdev.c"], "versions": [{"version": "d6fce5141929697a27f029c633433d487f6f62cb", "lessThan": "fbc65b17508ed5464b7106e7fa5f15251ca1b603", "status": "affected", "versionType": "git"}, {"version": "d6fce5141929697a27f029c633433d487f6f62cb", "lessThan": "e5afc6d3fabdf1f605d63c4b34a3df6c359e81f3", "status": "affected", "versionType": "git"}, {"version": "d6fce5141929697a27f029c633433d487f6f62cb", "lessThan": "cf419c869e0d03aad4b6f4ecf0a813851930dfe7", "status": "affected", "versionType": "git"}, {"version": "d6fce5141929697a27f029c633433d487f6f62cb", "lessThan": "d6084c47389fd6978a5d66b0d58206a548c792a9", "status": "affected", "versionType": "git"}, {"version": "d6fce5141929697a27f029c633433d487f6f62cb", "lessThan": "8a3c44a003176282ee4306b7c96e5a536c6f0707", "status": "affected", "versionType": "git"}, {"version": "d6fce5141929697a27f029c633433d487f6f62cb", "lessThan": "17f113e7b622dc850992ade540181717de6a8561", "status": "affected", "versionType": "git"}, {"version": "d6fce5141929697a27f029c633433d487f6f62cb", "lessThan": "483be61b4a9a6df3b7cb277e8f189e082dee4cb8", "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/net/ethernet/microchip/sparx5/sparx5_switchdev.c"], "versions": [{"version": "5.14", "status": "affected"}, {"version": "0", "lessThan": "5.14", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "5.14", "versionEndExcluding": "5.15.212"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "6.1.178"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "6.12.97"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/fbc65b17508ed5464b7106e7fa5f15251ca1b603"}, {"url": "https://git.kernel.org/stable/c/e5afc6d3fabdf1f605d63c4b34a3df6c359e81f3"}, {"url": "https://git.kernel.org/stable/c/cf419c869e0d03aad4b6f4ecf0a813851930dfe7"}, {"url": "https://git.kernel.org/stable/c/d6084c47389fd6978a5d66b0d58206a548c792a9"}, {"url": "https://git.kernel.org/stable/c/8a3c44a003176282ee4306b7c96e5a536c6f0707"}, {"url": "https://git.kernel.org/stable/c/17f113e7b622dc850992ade540181717de6a8561"}, {"url": "https://git.kernel.org/stable/c/483be61b4a9a6df3b7cb277e8f189e082dee4cb8"}], "title": "net: sparx5: unregister blocking notifier on init failure", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/net/ethernet/microchip/sparx5/sparx5_switchdev.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "fbc65b17508ed5464b7106e7fa5f15251ca1b603", "status": "affected", "version": "d6fce5141929697a27f029c633433d487f6f62cb", "versionType": "git"}, {"lessThan": "e5afc6d3fabdf1f605d63c4b34a3df6c359e81f3", "status": "affected", "version": "d6fce5141929697a27f029c633433d487f6f62cb", "versionType": "git"}, {"lessThan": "cf419c869e0d03aad4b6f4ecf0a813851930dfe7", "status": "affected", "version": "d6fce5141929697a27f029c633433d487f6f62cb", "versionType": "git"}, {"lessThan": "d6084c47389fd6978a5d66b0d58206a548c792a9", "status": "affected", "version": "d6fce5141929697a27f029c633433d487f6f62cb", "versionType": "git"}, {"lessThan": "8a3c44a003176282ee4306b7c96e5a536c6f0707", "status": "affected", "version": "d6fce5141929697a27f029c633433d487f6f62cb", "versionType": "git"}, {"lessThan": "17f113e7b622dc850992ade540181717de6a8561", "status": "affected", "version": "d6fce5141929697a27f029c633433d487f6f62cb", "versionType": "git"}, {"lessThan": "483be61b4a9a6df3b7cb277e8f189e082dee4cb8", "status": "affected", "version": "d6fce5141929697a27f029c633433d487f6f62cb", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/net/ethernet/microchip/sparx5/sparx5_switchdev.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.14"}, {"lessThan": "5.14", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.212", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.178", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.145", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.97", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.40", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "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\nnet: sparx5: unregister blocking notifier on init failure\n\nsparx5_register_notifier_blocks() registers the switchdev blocking\nnotifier before allocating the ordered workqueue. If the workqueue\nallocation fails, the error path unregisters the switchdev and netdevice\nnotifiers, but leaves the blocking notifier registered.\n\nAdd a separate error label for the workqueue allocation failure path and\nunregister the switchdev blocking notifier there."}], "id": "CVE-2026-72109", "lastModified": "2026-08-17T06:18:10.020", "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": "2026-08-15T06:21:25.203", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/17f113e7b622dc850992ade540181717de6a8561"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/483be61b4a9a6df3b7cb277e8f189e082dee4cb8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8a3c44a003176282ee4306b7c96e5a536c6f0707"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cf419c869e0d03aad4b6f4ecf0a813851930dfe7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d6084c47389fd6978a5d66b0d58206a548c792a9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e5afc6d3fabdf1f605d63c4b34a3df6c359e81f3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fbc65b17508ed5464b7106e7fa5f15251ca1b603"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: net: sparx5: unregister blocking notifier on init failure", "id": "2516632", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516632"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-772", "details": ["A flaw was found in the Linux kernel's `sparx5` network driver. An improper cleanup during initialization failure can leave a `switchdev` blocking notifier registered. This issue could lead to resource exhaustion or system instability, potentially resulting in a Denial of Service (DoS) condition."], "name": "CVE-2026-72109", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "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"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-72109\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-72109\nhttps://lore.kernel.org/linux-cve-announce/2026081526-CVE-2026-72109-2112@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d6fce5141929697a27f029c633433d487f6f62cb,fbc65b17508ed5464b7106e7fa5f15251ca1b603)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d6fce5141929697a27f029c633433d487f6f62cb,e5afc6d3fabdf1f605d63c4b34a3df6c359e81f3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d6fce5141929697a27f029c633433d487f6f62cb,cf419c869e0d03aad4b6f4ecf0a813851930dfe7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d6fce5141929697a27f029c633433d487f6f62cb,d6084c47389fd6978a5d66b0d58206a548c792a9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d6fce5141929697a27f029c633433d487f6f62cb,8a3c44a003176282ee4306b7c96e5a536c6f0707)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d6fce5141929697a27f029c633433d487f6f62cb,17f113e7b622dc850992ade540181717de6a8561)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d6fce5141929697a27f029c633433d487f6f62cb,483be61b4a9a6df3b7cb277e8f189e082dee4cb8)"}}], "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": "5.14"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,5.14)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.212,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.178,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.145,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.97,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.40,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-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": "2026-08-15T14:45:03.769269+00:00", "updated": "2026-08-18T05:45:03.310852+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}