CVE-2026-74718

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74718", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.928Z", "datePublished": "2026-08-22T15:33:12.106Z", "dateUpdated": "2026-08-22T15:33:12.106Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-22T15:33:12.106Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndevlink: fix net namespace reference leak in reload\n\ndevlink_nl_reload_doit() calls devlink_netns_get(), which returns a net\nwith a held reference. When the requested namespace differs from the\ncurrent one and the reload action is not DRIVER_REINIT, the function\nreturns -EOPNOTSUPP without releasing the reference. Add the missing\nput_net() on this error path."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/devlink/dev.c"], "versions": [{"version": "2edd92570441dd33246210042dc167319a5cf7e3", "lessThan": "7b6552e53426ea0539c667bbc5a524fdf7feae6f", "status": "affected", "versionType": "git"}, {"version": "2edd92570441dd33246210042dc167319a5cf7e3", "lessThan": "bf0797b92be591ac71d7c0f610e695caca3c72c9", "status": "affected", "versionType": "git"}, {"version": "2edd92570441dd33246210042dc167319a5cf7e3", "lessThan": "7b02c6d2a3cd2cd669f5c16685779f84328ae60c", "status": "affected", "versionType": "git"}, {"version": "2edd92570441dd33246210042dc167319a5cf7e3", "lessThan": "eda60c85b4f4c7d66b7141a5fe020b1a7f395341", "status": "affected", "versionType": "git"}, {"version": "2edd92570441dd33246210042dc167319a5cf7e3", "lessThan": "1c4dac9bf1d2ac31da63b794bdec697777cbd0fd", "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/dev.c"], "versions": [{"version": "6.3", "status": "affected"}, {"version": "0", "lessThan": "6.3", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.152", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.104", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.45", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.9", "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": "6.3", "versionEndExcluding": "6.6.152"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.12.104"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.18.45"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "7.1.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/7b6552e53426ea0539c667bbc5a524fdf7feae6f"}, {"url": "https://git.kernel.org/stable/c/bf0797b92be591ac71d7c0f610e695caca3c72c9"}, {"url": "https://git.kernel.org/stable/c/7b02c6d2a3cd2cd669f5c16685779f84328ae60c"}, {"url": "https://git.kernel.org/stable/c/eda60c85b4f4c7d66b7141a5fe020b1a7f395341"}, {"url": "https://git.kernel.org/stable/c/1c4dac9bf1d2ac31da63b794bdec697777cbd0fd"}], "title": "devlink: fix net namespace reference leak in reload", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/devlink/dev.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "7b6552e53426ea0539c667bbc5a524fdf7feae6f", "status": "affected", "version": "2edd92570441dd33246210042dc167319a5cf7e3", "versionType": "git"}, {"lessThan": "bf0797b92be591ac71d7c0f610e695caca3c72c9", "status": "affected", "version": "2edd92570441dd33246210042dc167319a5cf7e3", "versionType": "git"}, {"lessThan": "7b02c6d2a3cd2cd669f5c16685779f84328ae60c", "status": "affected", "version": "2edd92570441dd33246210042dc167319a5cf7e3", "versionType": "git"}, {"lessThan": "eda60c85b4f4c7d66b7141a5fe020b1a7f395341", "status": "affected", "version": "2edd92570441dd33246210042dc167319a5cf7e3", "versionType": "git"}, {"lessThan": "1c4dac9bf1d2ac31da63b794bdec697777cbd0fd", "status": "affected", "version": "2edd92570441dd33246210042dc167319a5cf7e3", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/devlink/dev.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.3"}, {"lessThan": "6.3", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.152", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.104", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.45", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.9", "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\ndevlink: fix net namespace reference leak in reload\n\ndevlink_nl_reload_doit() calls devlink_netns_get(), which returns a net\nwith a held reference. When the requested namespace differs from the\ncurrent one and the reload action is not DRIVER_REINIT, the function\nreturns -EOPNOTSUPP without releasing the reference. Add the missing\nput_net() on this error path."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ndevlink: corrige la fuga de referencia del espacio de nombres de red en la recarga\n\ndevlink_nl_reload_doit() llama a devlink_netns_get(), que devuelve un net con una referencia retenida. Cuando el espacio de nombres solicitado difiere del actual y la acci\u00f3n de recarga no es DRIVER_REINIT, la funci\u00f3n devuelve -EOPNOTSUPP sin liberar la referencia. A\u00f1ade el put_net() que falta en esta ruta de error."}], "id": "CVE-2026-74718", "lastModified": "2026-10-14T13:10:00.187", "metrics": {}, "published": "2026-08-22T16:16:46.710", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1c4dac9bf1d2ac31da63b794bdec697777cbd0fd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7b02c6d2a3cd2cd669f5c16685779f84328ae60c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7b6552e53426ea0539c667bbc5a524fdf7feae6f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bf0797b92be591ac71d7c0f610e695caca3c72c9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/eda60c85b4f4c7d66b7141a5fe020b1a7f395341"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: devlink: fix net namespace reference leak in reload", "id": "2521412", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2521412"}, "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-911", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ndevlink: fix net namespace reference leak in reload\ndevlink_nl_reload_doit() calls devlink_netns_get(), which returns a net\nwith a held reference. When the requested namespace differs from the\ncurrent one and the reload action is not DRIVER_REINIT, the function\nreturns -EOPNOTSUPP without releasing the reference. Add the missing\nput_net() on this error path.", "A flaw was found in the `devlink` component of the Linux kernel. When the `devlink_nl_reload_doit()` function is called, it may fail to release a network namespace reference under specific error conditions. This oversight occurs when the requested network namespace differs from the current one and the reload action is not DRIVER_REINIT. A local attacker could exploit this reference leak to cause resource exhaustion, leading to a Denial of Service (DoS)."], "name": "CVE-2026-74718", "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": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-74718\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-74718\nhttps://lore.kernel.org/linux-cve-announce/2026082239-CVE-2026-74718-49d4@gregkh/T"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2edd92570441dd33246210042dc167319a5cf7e3,7b6552e53426ea0539c667bbc5a524fdf7feae6f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2edd92570441dd33246210042dc167319a5cf7e3,bf0797b92be591ac71d7c0f610e695caca3c72c9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2edd92570441dd33246210042dc167319a5cf7e3,7b02c6d2a3cd2cd669f5c16685779f84328ae60c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2edd92570441dd33246210042dc167319a5cf7e3,eda60c85b4f4c7d66b7141a5fe020b1a7f395341)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2edd92570441dd33246210042dc167319a5cf7e3,1c4dac9bf1d2ac31da63b794bdec697777cbd0fd)"}}], "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": "6.3"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.3)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.152,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.104,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.45,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.9,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2,*]"}}], "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": "2026-08-22T18:30:16.837148+00:00", "updated": "2026-08-25T14:15:05.824671+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-399", "CWE-401", "CWE-911"]}