CVE-2026-31736

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{}

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This happens because\neth->netdev[0] will be NULL but the code will directly try to access\nnetdev_ops.\n\nInstead of just checking for the first net_device, it must be checked if\nany of the mtk_eth net_devices is matching the netdev_ops of the ingress\ndevice."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad:\n\nnet: ethernet: mtk_ppe: evitar la desreferencia nula cuando gmac0 est\u00e1 deshabilitado\n\nSi gmac0 est\u00e1 deshabilitado, la verificaci\u00f3n previa de un dispositivo de entrada v\u00e1lido causar\u00e1 una desreferencia de puntero NULL y bloquear\u00e1 el sistema. Esto ocurre porque eth -> netdev[0] ser\u00e1 NULL, pero el c\u00f3digo intentar\u00e1 acceder directamente a netdev_ops.\n\nEn lugar de solo verificar el primer net_device, se debe comprobar si alguno de los net_devices de mtk_eth coincide con las netdev_ops del dispositivo de entrada."}], "id": "CVE-2026-31736", "lastModified": "2026-11-11T21:10:00.200", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2026-05-01T15:16:36.240", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0b832aad33e6f160fda310f0306a6483d85e9d6e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5dff799c677152dde963c3917bacd9127b03e145"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7b2380f0a0e374010c1a4a13203511b9dee5b166"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/976ff48c2ac6e6b25b01428c9d7997bcd0fb2949"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: net: ethernet: mtk_ppe: avoid NULL deref when gmac0 is disabled", "id": "2464423", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2464423"}, "csaw": false, "cwe": "CWE-476", "details": ["A flaw was found in the Linux kernel's `mtk_ppe` Ethernet driver. When the `gmac0` interface is disabled, a precheck for a valid ingress device can lead to a NULL pointer dereference. This vulnerability can cause a system crash, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-31736", "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": "2026-05-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-31736\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-31736\nhttps://lore.kernel.org/linux-cve-announce/2026050138-CVE-2026-31736-c2a4@gregkh/T"]}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[73cfd947dbdb25ef9863ac49c4596a7d53ad4025,0b832aad33e6f160fda310f0306a6483d85e9d6e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[73cfd947dbdb25ef9863ac49c4596a7d53ad4025,5dff799c677152dde963c3917bacd9127b03e145)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[73cfd947dbdb25ef9863ac49c4596a7d53ad4025,7b2380f0a0e374010c1a4a13203511b9dee5b166)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[73cfd947dbdb25ef9863ac49c4596a7d53ad4025,976ff48c2ac6e6b25b01428c9d7997bcd0fb2949)"}}], "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": "6.11"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.11)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.81,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.22,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.12,6.20.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0,*]"}}], "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": "2026-05-01T15:45:15.879091+00:00", "updated": "2026-05-07T19:00:11.694842+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}