{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74631", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.922Z", "datePublished": "2026-08-22T15:32:12.334Z", "dateUpdated": "2026-08-22T15:32:12.334Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-22T15:32:12.334Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: smc: fix splice entry lifetime imbalance in smc_rx_splice\n\nsmc_rx_splice() passes pages to splice_to_pipe() before taking the\nreferences that cover the lifetime of each splice entry. In the\nVM-backed RMB path, splice_to_pipe() may drop unqueued entries through\nsmc_rx_spd_release(), while queued entries are released later via the\npipe buffer callback.\n\nThe old post-splice accounting also derives the number of queued VM pages\nfrom an offset mutated while building the descriptor, and a multi-page\nsplice pairs one sock_hold() with multiple sock_put() calls.\n\nTake the page and socket references for every candidate entry before\nsplice_to_pipe(), and drop the matching private state, page reference,\nand socket reference from smc_rx_spd_release() for entries that never\nget queued. This fixes a refcount imbalance that can underflow page\nrefcounts and trigger a use-after-free."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/smc/smc_rx.c"], "versions": [{"version": "9014db202cb764b8e14c53e7bacc81f9a1a2ba7f", "lessThan": "c841789e456ec6751342fa800639ce8e82ff0e6b", "status": "affected", "versionType": "git"}, {"version": "9014db202cb764b8e14c53e7bacc81f9a1a2ba7f", "lessThan": "af02c67ce654356c58db20a0bb2db33ace3b07a8", "status": "affected", "versionType": "git"}, {"version": "9014db202cb764b8e14c53e7bacc81f9a1a2ba7f", "lessThan": "ca8342b5fc24c249fdb998468f6a168b457c67e5", "status": "affected", "versionType": "git"}, {"version": "9014db202cb764b8e14c53e7bacc81f9a1a2ba7f", "lessThan": "0b7d54cedea5cb158e21925ae0c6c2f5c87ed2a0", "status": "affected", "versionType": "git"}, {"version": "9014db202cb764b8e14c53e7bacc81f9a1a2ba7f", "lessThan": "4515c78f4d9fd577270f012efeb062ea58b3682d", "status": "affected", "versionType": "git"}, {"version": "9014db202cb764b8e14c53e7bacc81f9a1a2ba7f", "lessThan": "5d9686af2976741bbd79b150d1c9e60b81e7f12e", "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/smc/smc_rx.c"], "versions": [{"version": "4.18", "status": "affected"}, {"version": "0", "lessThan": "4.18", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.183", "lessThanOrEqual": "6.1.*", "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": "4.18", "versionEndExcluding": "6.1.183"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "6.6.152"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "6.12.104"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "6.18.45"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "7.1.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/c841789e456ec6751342fa800639ce8e82ff0e6b"}, {"url": "https://git.kernel.org/stable/c/af02c67ce654356c58db20a0bb2db33ace3b07a8"}, {"url": "https://git.kernel.org/stable/c/ca8342b5fc24c249fdb998468f6a168b457c67e5"}, {"url": "https://git.kernel.org/stable/c/0b7d54cedea5cb158e21925ae0c6c2f5c87ed2a0"}, {"url": "https://git.kernel.org/stable/c/4515c78f4d9fd577270f012efeb062ea58b3682d"}, {"url": "https://git.kernel.org/stable/c/5d9686af2976741bbd79b150d1c9e60b81e7f12e"}], "title": "net: smc: fix splice entry lifetime imbalance in smc_rx_splice", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/smc/smc_rx.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "c841789e456ec6751342fa800639ce8e82ff0e6b", "status": "affected", "version": "9014db202cb764b8e14c53e7bacc81f9a1a2ba7f", "versionType": "git"}, {"lessThan": "af02c67ce654356c58db20a0bb2db33ace3b07a8", "status": "affected", "version": "9014db202cb764b8e14c53e7bacc81f9a1a2ba7f", "versionType": "git"}, {"lessThan": "ca8342b5fc24c249fdb998468f6a168b457c67e5", "status": "affected", "version": "9014db202cb764b8e14c53e7bacc81f9a1a2ba7f", "versionType": "git"}, {"lessThan": "0b7d54cedea5cb158e21925ae0c6c2f5c87ed2a0", "status": "affected", "version": "9014db202cb764b8e14c53e7bacc81f9a1a2ba7f", "versionType": "git"}, {"lessThan": "4515c78f4d9fd577270f012efeb062ea58b3682d", "status": "affected", "version": "9014db202cb764b8e14c53e7bacc81f9a1a2ba7f", "versionType": "git"}, {"lessThan": "5d9686af2976741bbd79b150d1c9e60b81e7f12e", "status": "affected", "version": "9014db202cb764b8e14c53e7bacc81f9a1a2ba7f", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/smc/smc_rx.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.18"}, {"lessThan": "4.18", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.183", "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\nnet: smc: fix splice entry lifetime imbalance in smc_rx_splice\n\nsmc_rx_splice() passes pages to splice_to_pipe() before taking the\nreferences that cover the lifetime of each splice entry. In the\nVM-backed RMB path, splice_to_pipe() may drop unqueued entries through\nsmc_rx_spd_release(), while queued entries are released later via the\npipe buffer callback.\n\nThe old post-splice accounting also derives the number of queued VM pages\nfrom an offset mutated while building the descriptor, and a multi-page\nsplice pairs one sock_hold() with multiple sock_put() calls.\n\nTake the page and socket references for every candidate entry before\nsplice_to_pipe(), and drop the matching private state, page reference,\nand socket reference from smc_rx_spd_release() for entries that never\nget queued. This fixes a refcount imbalance that can underflow page\nrefcounts and trigger a use-after-free."}], "id": "CVE-2026-74631", "lastModified": "2026-08-22T16:16:36.080", "metrics": {}, "published": "2026-08-22T16:16:36.080", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0b7d54cedea5cb158e21925ae0c6c2f5c87ed2a0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4515c78f4d9fd577270f012efeb062ea58b3682d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5d9686af2976741bbd79b150d1c9e60b81e7f12e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/af02c67ce654356c58db20a0bb2db33ace3b07a8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c841789e456ec6751342fa800639ce8e82ff0e6b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ca8342b5fc24c249fdb998468f6a168b457c67e5"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9014db202cb764b8e14c53e7bacc81f9a1a2ba7f,c841789e456ec6751342fa800639ce8e82ff0e6b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9014db202cb764b8e14c53e7bacc81f9a1a2ba7f,af02c67ce654356c58db20a0bb2db33ace3b07a8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9014db202cb764b8e14c53e7bacc81f9a1a2ba7f,ca8342b5fc24c249fdb998468f6a168b457c67e5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9014db202cb764b8e14c53e7bacc81f9a1a2ba7f,0b7d54cedea5cb158e21925ae0c6c2f5c87ed2a0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9014db202cb764b8e14c53e7bacc81f9a1a2ba7f,4515c78f4d9fd577270f012efeb062ea58b3682d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9014db202cb764b8e14c53e7bacc81f9a1a2ba7f,5d9686af2976741bbd79b150d1c9e60b81e7f12e)"}}], "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": "4.18"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.18)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.1.183,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.6.152,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.104,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.45,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "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": "2026-08-22T18:45:04.674973+00:00", "updated": "2026-08-22T19:30:17.297190+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-416"]}