{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74431", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.895Z", "datePublished": "2026-08-15T05:59:31.586Z", "dateUpdated": "2026-08-17T05:47:06.624Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:47:06.624Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: Fix potential infinite loop in rxrpc_recvmsg()\n\nFix the wait in rxrpc_recvmsg() also take check the oob queue."}], "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 - RxRPC processes CHALLENGE packets from remote UDP peers in net/rxrpc/io_thread.c through rxrpc_input_conn_packet() into recvmsg_oobq; a malicious or compromised AFS/YFS fileserver can deliver the trigger over the network without local access.\nAC:L - Once a victim RxGK client with RXRPC_MANAGE_RESPONSE has an established connection, a remote peer can send a valid CHALLENGE at any time and reliably strand a blocking recvmsg() in the defective wait path whenever recvmsg_q is empty but recvmsg_oobq is not.\nPR:N - Exploitation requires only the ability to act as the remote RxRPC server peer on an existing client connection; the attacker needs no local account, capabilities, or authentication on the victim host.\nUI:N - The hang is triggered during normal blocking recvmsg() operation while waiting for call data; no additional victim action beyond routine client connectivity is required at exploitation time.\nS:U - Impact is confined to the kernel thread executing recvmsg() on the affected AF_RXRPC socket within the same security authority; there is no cross-boundary escape to other VMs, containers, or privilege domains.\nC:N - This is a control-flow logic error in the recvmsg() wait loop with no out-of-bounds access, use-after-free, or information disclosure; no memory is read or leaked to the attacker.\nI:N - The bug causes an infinite busy-loop in recvmsg() without modifying kernel or user data, corrupting memory, or enabling arbitrary writes or code execution.\nA:H - When recvmsg_q is empty but recvmsg_oobq holds a CHALLENGE, the pre-fix code re-enters try_again without sleeping or dequeuing OOB data, causing an infinite kernel loop that hangs the calling thread and can saturate a CPU core."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/rxrpc/recvmsg.c"], "versions": [{"version": "5800b1cf3fd8ccab752a101865be1e76dac33142", "lessThan": "0fc5b37faec26241d3cbee732e29ac35ad3184f8", "status": "affected", "versionType": "git"}, {"version": "5800b1cf3fd8ccab752a101865be1e76dac33142", "lessThan": "da371b003a4a44f44741275d5e8dc74181cbb017", "status": "affected", "versionType": "git"}, {"version": "5800b1cf3fd8ccab752a101865be1e76dac33142", "lessThan": "67a0332f442ef07713cd2d9c13d59db0f1c23648", "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/rxrpc/recvmsg.c"], "versions": [{"version": "6.16", "status": "affected"}, {"version": "0", "lessThan": "6.16", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "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": "6.16", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/0fc5b37faec26241d3cbee732e29ac35ad3184f8"}, {"url": "https://git.kernel.org/stable/c/da371b003a4a44f44741275d5e8dc74181cbb017"}, {"url": "https://git.kernel.org/stable/c/67a0332f442ef07713cd2d9c13d59db0f1c23648"}], "title": "rxrpc: Fix potential infinite loop in rxrpc_recvmsg()", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/rxrpc/recvmsg.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "0fc5b37faec26241d3cbee732e29ac35ad3184f8", "status": "affected", "version": "5800b1cf3fd8ccab752a101865be1e76dac33142", "versionType": "git"}, {"lessThan": "da371b003a4a44f44741275d5e8dc74181cbb017", "status": "affected", "version": "5800b1cf3fd8ccab752a101865be1e76dac33142", "versionType": "git"}, {"lessThan": "67a0332f442ef07713cd2d9c13d59db0f1c23648", "status": "affected", "version": "5800b1cf3fd8ccab752a101865be1e76dac33142", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/rxrpc/recvmsg.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.16"}, {"lessThan": "6.16", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.40", "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\nrxrpc: Fix potential infinite loop in rxrpc_recvmsg()\n\nFix the wait in rxrpc_recvmsg() also take check the oob queue."}], "id": "CVE-2026-74431", "lastModified": "2026-08-17T06:19:38.723", "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": "2026-08-15T06:22:45.227", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0fc5b37faec26241d3cbee732e29ac35ad3184f8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/67a0332f442ef07713cd2d9c13d59db0f1c23648"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/da371b003a4a44f44741275d5e8dc74181cbb017"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: rxrpc: Fix potential infinite loop in rxrpc_recvmsg()", "id": "2516904", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516904"}, "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": ["A flaw was found in the Linux kernel's rxrpc network protocol implementation. This vulnerability could allow an attacker to trigger an infinite loop within the `rxrpc_recvmsg()` function by manipulating out-of-band (OOB) queue handling. This could lead to a Denial of Service (DoS) condition, making the system unresponsive."], "name": "CVE-2026-74431", "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-74431\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-74431\nhttps://lore.kernel.org/linux-cve-announce/2026081514-CVE-2026-74431-45d4@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5800b1cf3fd8ccab752a101865be1e76dac33142,0fc5b37faec26241d3cbee732e29ac35ad3184f8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5800b1cf3fd8ccab752a101865be1e76dac33142,da371b003a4a44f44741275d5e8dc74181cbb017)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5800b1cf3fd8ccab752a101865be1e76dac33142,67a0332f442ef07713cd2d9c13d59db0f1c23648)"}}], "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": "6.16"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.16)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.40,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "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": "2026-08-15T13:45:03.196500+00:00", "updated": "2026-08-21T23:45:03.448208+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}