CVE-2026-98492

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98492", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.353Z", "datePublished": "2026-10-18T15:16:21.208Z", "dateUpdated": "2026-10-19T09:20:29.361Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:20:29.361Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: macb: fix dma_alloc_coherent() leak on macb_alloc() error paths\n\nFix 3 leaks in macb_alloc() error paths:\n- Tx buffer allocated but crossing a 4G boundary: Tx leaked.\n- Rx buffer allocation fails: Tx leaked.\n- Rx buffer allocated but crossing a 4G boundary: Tx & Rx leaked.\n\nThis is because our error handling calls macb_free(bp) which in turn\nfrees the buffers stored in bp->queues[0], but nothing has been stored\nin there. Fix by storing allocated buffers into bp->queues[0] ASAP."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/cadence/macb_main.c"], "versions": [{"version": "78d901897b3cae06b38f54e48a2378cf9da21175", "lessThan": "bda487567d0b7b15dfa876511085c0666b9efad5", "status": "affected", "versionType": "git"}, {"version": "78d901897b3cae06b38f54e48a2378cf9da21175", "lessThan": "259e6cbb6a097da8ced544ee92a6fbde35aa1338", "status": "affected", "versionType": "git"}, {"version": "78d901897b3cae06b38f54e48a2378cf9da21175", "lessThan": "23d42b9a3bcd55b17d3b371544fedc708c2397e9", "status": "affected", "versionType": "git"}, {"version": "982a4d9a2e12b693f684eff943043a607628d871", "status": "affected", "versionType": "git"}, {"version": "6.17.3", "lessThan": "6.18", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/cadence/macb_main.c"], "versions": [{"version": "6.18", "status": "affected"}, {"version": "0", "lessThan": "6.18", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.55", "lessThanOrEqual": "6.18.*", "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": "6.18", "versionEndExcluding": "6.18.55"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "7.2.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "7.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.17.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/bda487567d0b7b15dfa876511085c0666b9efad5"}, {"url": "https://git.kernel.org/stable/c/259e6cbb6a097da8ced544ee92a6fbde35aa1338"}, {"url": "https://git.kernel.org/stable/c/23d42b9a3bcd55b17d3b371544fedc708c2397e9"}], "title": "net: macb: fix dma_alloc_coherent() leak on macb_alloc() error paths", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/net/ethernet/cadence/macb_main.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "bda487567d0b7b15dfa876511085c0666b9efad5", "status": "affected", "version": "78d901897b3cae06b38f54e48a2378cf9da21175", "versionType": "git"}, {"lessThan": "259e6cbb6a097da8ced544ee92a6fbde35aa1338", "status": "affected", "version": "78d901897b3cae06b38f54e48a2378cf9da21175", "versionType": "git"}, {"lessThan": "23d42b9a3bcd55b17d3b371544fedc708c2397e9", "status": "affected", "version": "78d901897b3cae06b38f54e48a2378cf9da21175", "versionType": "git"}, {"status": "affected", "version": "982a4d9a2e12b693f684eff943043a607628d871", "versionType": "git"}, {"lessThan": "6.18", "status": "affected", "version": "6.17.3", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/net/ethernet/cadence/macb_main.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.18"}, {"lessThan": "6.18", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.55", "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\nnet: macb: fix dma_alloc_coherent() leak on macb_alloc() error paths\n\nFix 3 leaks in macb_alloc() error paths:\n- Tx buffer allocated but crossing a 4G boundary: Tx leaked.\n- Rx buffer allocation fails: Tx leaked.\n- Rx buffer allocated but crossing a 4G boundary: Tx & Rx leaked.\n\nThis is because our error handling calls macb_free(bp) which in turn\nfrees the buffers stored in bp->queues[0], but nothing has been stored\nin there. Fix by storing allocated buffers into bp->queues[0] ASAP."}], "id": "CVE-2026-98492", "lastModified": "2026-10-19T10:19:01.310", "metrics": {}, "published": "2026-10-18T16:17:00.150", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/23d42b9a3bcd55b17d3b371544fedc708c2397e9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/259e6cbb6a097da8ced544ee92a6fbde35aa1338"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bda487567d0b7b15dfa876511085c0666b9efad5"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: net: macb: fix dma_alloc_coherent() leak on macb_alloc() error paths", "id": "2554890", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2554890"}, "csaw": false, "cvss3": {"cvss3_base_score": "1.9", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L", "status": "draft"}, "cwe": "CWE-772", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet: macb: fix dma_alloc_coherent() leak on macb_alloc() error paths\nFix 3 leaks in macb_alloc() error paths:\n- Tx buffer allocated but crossing a 4G boundary: Tx leaked.\n- Rx buffer allocation fails: Tx leaked.\n- Rx buffer allocated but crossing a 4G boundary: Tx & Rx leaked.\nThis is because our error handling calls macb_free(bp) which in turn\nfrees the buffers stored in bp->queues[0], but nothing has been stored\nin there. Fix by storing allocated buffers into bp->queues[0] ASAP.", "A flaw was found in the Linux kernel's Cadence MACB network driver. During network buffer allocation, the driver's error-handling routines fail to properly release allocated Direct Memory Access (DMA) memory buffers when a failure occurs. A local user could trigger these error conditions during device initialization or interface setup, causing kernel memory to leak. Over time, this unreleased memory can result in system resource exhaustion and a Denial of Service (DoS)."], "name": "CVE-2026-98492", "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"}, {"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-2026-98492\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98492\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98492.mbox"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[78d901897b3cae06b38f54e48a2378cf9da21175,bda487567d0b7b15dfa876511085c0666b9efad5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[78d901897b3cae06b38f54e48a2378cf9da21175,259e6cbb6a097da8ced544ee92a6fbde35aa1338)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[78d901897b3cae06b38f54e48a2378cf9da21175,23d42b9a3bcd55b17d3b371544fedc708c2397e9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "982a4d9a2e12b693f684eff943043a607628d871"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.17.3,6.18)"}}], "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": "6.18"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.18)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.55,7.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.9,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.3-rc5,*]"}}], "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": "2026-10-18T17:45:06.375508+00:00", "updated": "2026-10-23T07:30:09.345780+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}