CVE-2026-68449

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-68449", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-30T09:28:09.395Z", "datePublished": "2026-08-12T00:51:47.140Z", "dateUpdated": "2026-10-30T12:28:40.534Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:28:40.534Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nata: sata_dwc_460ex: fix infinite loop in NCQ tag completion bit-scanning\n\nThe hand-rolled bit-scanning loop in the NCQ completion path has an\ninfinite loop bug. When tag_mask has only high bits set (e.g.\n0x80000000), the inner while loop left-shifts tag_mask until it\noverflows to 0. At that point !(0 & 1) is always true and 0 <<= 1\nstays 0, causing an infinite loop in hardirq context with a spinlock\nheld.\n\nReplace the open-coded bit-scanning with __ffs() which correctly\nfinds the least significant set bit and is bounded by the width of\nthe argument."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/ata/sata_dwc_460ex.c"], "versions": [{"version": "62936009f35a6659cc3ebe0d90c754182d60da73", "lessThan": "ea9fa4dabe476f85fe73df30a6ab61a23c22fda4", "status": "affected", "versionType": "git"}, {"version": "62936009f35a6659cc3ebe0d90c754182d60da73", "lessThan": "d72e8089dc332ac48293512ef0de77cbe0e04d25", "status": "affected", "versionType": "git"}, {"version": "62936009f35a6659cc3ebe0d90c754182d60da73", "lessThan": "90e8cf489b593814b9398aa187ddbb790e33ec6f", "status": "affected", "versionType": "git"}, {"version": "62936009f35a6659cc3ebe0d90c754182d60da73", "lessThan": "4c6e64cae2b2dab32ad9099faa339f6a72c0ce16", "status": "affected", "versionType": "git"}, {"version": "62936009f35a6659cc3ebe0d90c754182d60da73", "lessThan": "8c5de0d8ab6824cfdadcbbe1be4c6c9d9f4c1f80", "status": "affected", "versionType": "git"}, {"version": "62936009f35a6659cc3ebe0d90c754182d60da73", "lessThan": "1842d45f461a78988254631893329bdf4596e954", "status": "affected", "versionType": "git"}, {"version": "62936009f35a6659cc3ebe0d90c754182d60da73", "lessThan": "29b916d3556bd12a95be7c56ca391b8cd572f8be", "status": "affected", "versionType": "git"}, {"version": "62936009f35a6659cc3ebe0d90c754182d60da73", "lessThan": "c2130f6553f4a5cbdc259de069600117a995f197", "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/ata/sata_dwc_460ex.c"], "versions": [{"version": "2.6.36", "status": "affected"}, {"version": "0", "lessThan": "2.6.36", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.265", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.216", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.148", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.101", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.42", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.6", "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": "2.6.36", "versionEndExcluding": "5.10.265"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.36", "versionEndExcluding": "5.15.216"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.36", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.36", "versionEndExcluding": "6.6.148"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.36", "versionEndExcluding": "6.12.101"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.36", "versionEndExcluding": "6.18.42"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.36", "versionEndExcluding": "7.1.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.36", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ea9fa4dabe476f85fe73df30a6ab61a23c22fda4"}, {"url": "https://git.kernel.org/stable/c/d72e8089dc332ac48293512ef0de77cbe0e04d25"}, {"url": "https://git.kernel.org/stable/c/90e8cf489b593814b9398aa187ddbb790e33ec6f"}, {"url": "https://git.kernel.org/stable/c/4c6e64cae2b2dab32ad9099faa339f6a72c0ce16"}, {"url": "https://git.kernel.org/stable/c/8c5de0d8ab6824cfdadcbbe1be4c6c9d9f4c1f80"}, {"url": "https://git.kernel.org/stable/c/1842d45f461a78988254631893329bdf4596e954"}, {"url": "https://git.kernel.org/stable/c/29b916d3556bd12a95be7c56ca391b8cd572f8be"}, {"url": "https://git.kernel.org/stable/c/c2130f6553f4a5cbdc259de069600117a995f197"}], "title": "ata: sata_dwc_460ex: fix infinite loop in NCQ tag completion bit-scanning", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/ata/sata_dwc_460ex.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "ea9fa4dabe476f85fe73df30a6ab61a23c22fda4", "status": "affected", "version": "62936009f35a6659cc3ebe0d90c754182d60da73", "versionType": "git"}, {"lessThan": "d72e8089dc332ac48293512ef0de77cbe0e04d25", "status": "affected", "version": "62936009f35a6659cc3ebe0d90c754182d60da73", "versionType": "git"}, {"lessThan": "90e8cf489b593814b9398aa187ddbb790e33ec6f", "status": "affected", "version": "62936009f35a6659cc3ebe0d90c754182d60da73", "versionType": "git"}, {"lessThan": "4c6e64cae2b2dab32ad9099faa339f6a72c0ce16", "status": "affected", "version": "62936009f35a6659cc3ebe0d90c754182d60da73", "versionType": "git"}, {"lessThan": "8c5de0d8ab6824cfdadcbbe1be4c6c9d9f4c1f80", "status": "affected", "version": "62936009f35a6659cc3ebe0d90c754182d60da73", "versionType": "git"}, {"lessThan": "1842d45f461a78988254631893329bdf4596e954", "status": "affected", "version": "62936009f35a6659cc3ebe0d90c754182d60da73", "versionType": "git"}, {"lessThan": "29b916d3556bd12a95be7c56ca391b8cd572f8be", "status": "affected", "version": "62936009f35a6659cc3ebe0d90c754182d60da73", "versionType": "git"}, {"lessThan": "c2130f6553f4a5cbdc259de069600117a995f197", "status": "affected", "version": "62936009f35a6659cc3ebe0d90c754182d60da73", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/ata/sata_dwc_460ex.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.36"}, {"lessThan": "2.6.36", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.265", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.216", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.148", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.101", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.42", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.6", "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\nata: sata_dwc_460ex: fix infinite loop in NCQ tag completion bit-scanning\n\nThe hand-rolled bit-scanning loop in the NCQ completion path has an\ninfinite loop bug. When tag_mask has only high bits set (e.g.\n0x80000000), the inner while loop left-shifts tag_mask until it\noverflows to 0. At that point !(0 & 1) is always true and 0 <<= 1\nstays 0, causing an infinite loop in hardirq context with a spinlock\nheld.\n\nReplace the open-coded bit-scanning with __ffs() which correctly\nfinds the least significant set bit and is bounded by the width of\nthe argument."}], "id": "CVE-2026-68449", "lastModified": "2026-10-30T13:19:46.003", "metrics": {}, "published": "2026-08-12T01:17:07.810", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1842d45f461a78988254631893329bdf4596e954"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/29b916d3556bd12a95be7c56ca391b8cd572f8be"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4c6e64cae2b2dab32ad9099faa339f6a72c0ce16"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8c5de0d8ab6824cfdadcbbe1be4c6c9d9f4c1f80"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/90e8cf489b593814b9398aa187ddbb790e33ec6f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c2130f6553f4a5cbdc259de069600117a995f197"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d72e8089dc332ac48293512ef0de77cbe0e04d25"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ea9fa4dabe476f85fe73df30a6ab61a23c22fda4"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: ata: sata_dwc_460ex: fix infinite loop in NCQ tag completion bit-scanning", "id": "2514463", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2514463"}, "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-835", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nata: sata_dwc_460ex: fix infinite loop in NCQ tag completion bit-scanning\nThe hand-rolled bit-scanning loop in the NCQ completion path has an\ninfinite loop bug. When tag_mask has only high bits set (e.g.\n0x80000000), the inner while loop left-shifts tag_mask until it\noverflows to 0. At that point !(0 & 1) is always true and 0 <<= 1\nstays 0, causing an infinite loop in hardirq context with a spinlock\nheld.\nReplace the open-coded bit-scanning with __ffs() which correctly\nfinds the least significant set bit and is bounded by the width of\nthe argument.", "A flaw was found in the Linux kernel's `sata_dwc_460ex` component. A hand-rolled bit-scanning loop in the NCQ tag completion path contains an infinite loop bug. When a specific `tag_mask` value is processed, the loop can overflow, causing an infinite loop in a hard interrupt request (hardirq) context while a spinlock is held. This can lead to a system hang or crash, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-68449", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "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"}, {"cpe": "cpe:/a:redhat:enterprise_linux_nvidia:", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux for NVIDIA 26"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "rhcos", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-08-12T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-68449\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-68449\nhttps://lore.kernel.org/linux-cve-announce/2026081225-CVE-2026-68449-a314@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[62936009f35a6659cc3ebe0d90c754182d60da73,4c6e64cae2b2dab32ad9099faa339f6a72c0ce16)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[62936009f35a6659cc3ebe0d90c754182d60da73,8c5de0d8ab6824cfdadcbbe1be4c6c9d9f4c1f80)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[62936009f35a6659cc3ebe0d90c754182d60da73,1842d45f461a78988254631893329bdf4596e954)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[62936009f35a6659cc3ebe0d90c754182d60da73,29b916d3556bd12a95be7c56ca391b8cd572f8be)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[62936009f35a6659cc3ebe0d90c754182d60da73,c2130f6553f4a5cbdc259de069600117a995f197)"}}], "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": "2.6.36"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,2.6.36)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.148,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.101,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.42,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.6,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc4,*]"}}], "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": "2026-08-12T14:45:03.072379+00:00", "updated": "2026-08-13T13:45:03.820261+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-665", "CWE-672", "CWE-835"]}