{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74374", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.889Z", "datePublished": "2026-08-15T05:58:53.659Z", "dateUpdated": "2026-08-17T05:46:27.554Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:46:27.554Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd/raid1,raid10: fix error-path detection with md_cloned_bio()\n\nDetect the error path using md_cloned_bio() instead of relying\non r1_bio in raid1 or r10_bio->read_slot in raid10, which may be\nNULL or -1 after splitting and resubmitting a failed bio.\n\nAs a result, the error path may not be recognized and memory\nallocations can incorrectly use GFP_NOIO instead of\n(GFP_NOIO | __GFP_HIGH), which can lead to a deadlock under\nmemory pressure."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:N - Linux file/NAS servers commonly export md RAID1/RAID10 volumes via nfsd, ksmbd, or iSCSI; remote client reads reach md_submit_bio()\u2192raid1/raid10_read_request(), and mirror read failures drive handle_read_error() on the blocked raid1d/raid10d thread without local shell access.\nAC:L - An attacker can reliably hit the bug by reading sectors on a degraded mirror that return errors (common on production arrays), issuing large reads that bio_submit_split_bioset() splits on the error-retry path, and concurrently applying memory pressure so GFP_NOIO bio_alloc_clone() blocks reclaim while raid1d/raid10d holds the array frozen.\nPR:N - Triggering the fault path requires only permission to read exported storage or files on an md-backed filesystem; no CAP_SYS_ADMIN, md ioctl, or init-namespace root is needed because read I/O and mirror error recovery run with no extra capability checks beyond normal block-device access.\nUI:N - No victim interaction is required; exploitation uses the attacker's own read I/O (or scripted NFS/SMB/iSCSI reads) together with memory pressure, without anyone mounting disks, acknowledging bad blocks, or performing other cooperative actions.\nS:U - The circular GFP_NOIO allocation wait while raid1d/raid10d is blocked in handle_read_error() freezes I/O within the same host kernel and md security domain; it does not cross VM, container, or IOMMU boundaries.\nC:N - This is a GFP-flag misclassification causing reclaim/I/O circular wait (deadlock), not memory corruption, out-of-bounds access, use-after-free, or other primitives that could disclose kernel or user data.\nI:N - The flaw does not enable arbitrary writes, code execution, or silent data modification; impact is limited to blocking forward progress in the RAID error-recovery path under memory pressure.\nA:H - Without __GFP_HIGH on the error path, bio_alloc_clone() can stall reclaim while raid1d/raid10d blocks with the array frozen, deadlocking all I/O to the md device and potentially hanging root/data volumes on enterprise RAID1/RAID10 servers."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/md/raid1.c", "drivers/md/raid10.c"], "versions": [{"version": "689389a06ce79fdced85b5115717f71c71e623e0", "lessThan": "20fb582c92fd64e5c8bd83c6176264b2794603b7", "status": "affected", "versionType": "git"}, {"version": "689389a06ce79fdced85b5115717f71c71e623e0", "lessThan": "811545e0926d02a6a0b1a1258bb5544777c164d4", "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/md/raid1.c", "drivers/md/raid10.c"], "versions": [{"version": "4.12", "status": "affected"}, {"version": "0", "lessThan": "4.12", "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": "4.12", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/20fb582c92fd64e5c8bd83c6176264b2794603b7"}, {"url": "https://git.kernel.org/stable/c/811545e0926d02a6a0b1a1258bb5544777c164d4"}], "title": "md/raid1,raid10: fix error-path detection with md_cloned_bio()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/md/raid1.c", "drivers/md/raid10.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "20fb582c92fd64e5c8bd83c6176264b2794603b7", "status": "affected", "version": "689389a06ce79fdced85b5115717f71c71e623e0", "versionType": "git"}, {"lessThan": "811545e0926d02a6a0b1a1258bb5544777c164d4", "status": "affected", "version": "689389a06ce79fdced85b5115717f71c71e623e0", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/md/raid1.c", "drivers/md/raid10.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.12"}, {"lessThan": "4.12", "status": "unaffected", "version": "0", "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\nmd/raid1,raid10: fix error-path detection with md_cloned_bio()\n\nDetect the error path using md_cloned_bio() instead of relying\non r1_bio in raid1 or r10_bio->read_slot in raid10, which may be\nNULL or -1 after splitting and resubmitting a failed bio.\n\nAs a result, the error path may not be recognized and memory\nallocations can incorrectly use GFP_NOIO instead of\n(GFP_NOIO | __GFP_HIGH), which can lead to a deadlock under\nmemory pressure."}], "id": "CVE-2026-74374", "lastModified": "2026-08-17T06:19:32.187", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-08-15T06:22:39.173", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/20fb582c92fd64e5c8bd83c6176264b2794603b7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/811545e0926d02a6a0b1a1258bb5544777c164d4"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: md/raid1,raid10: fix error-path detection with md_cloned_bio()", "id": "2516874", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516874"}, "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-833", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nmd/raid1,raid10: fix error-path detection with md_cloned_bio()\nDetect the error path using md_cloned_bio() instead of relying\non r1_bio in raid1 or r10_bio->read_slot in raid10, which may be\nNULL or -1 after splitting and resubmitting a failed bio.\nAs a result, the error path may not be recognized and memory\nallocations can incorrectly use GFP_NOIO instead of\n(GFP_NOIO | __GFP_HIGH), which can lead to a deadlock under\nmemory pressure.", "A flaw was found in the Linux kernel's `md/raid1` and `md/raid10` modules. An issue in detecting the error path when using `md_cloned_bio()` can lead to incorrect memory allocation flags. This misallocation can result in a system deadlock under memory pressure, causing a denial of service."], "name": "CVE-2026-74374", "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": "Out of support scope", "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": "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"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-74374\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-74374\nhttps://lore.kernel.org/linux-cve-announce/2026081504-CVE-2026-74374-913a@gregkh/T"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[689389a06ce79fdced85b5115717f71c71e623e0,20fb582c92fd64e5c8bd83c6176264b2794603b7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[689389a06ce79fdced85b5115717f71c71e623e0,811545e0926d02a6a0b1a1258bb5544777c164d4)"}}], "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": "4.12"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.12)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "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": "2026-08-15T16:30:03.972416+00:00", "updated": "2026-08-22T00:00:16.115107+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-362", "CWE-833"]}