CVE-2026-53274

{"id": "CVE-2026-53274", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "a6a6fe27bab48f0d09a64b051e7bde432fcae081", "lessThan": "35a22117839602bb52283de08894c5a7dde92420", "versionType": "git"}, {"status": "affected", "version": "a6a6fe27bab48f0d09a64b051e7bde432fcae081", "lessThan": "5d27d2ffe487df89ce28fda0410eafa05dbe03a0", "versionType": "git"}, {"status": "affected", "version": "a6a6fe27bab48f0d09a64b051e7bde432fcae081", "lessThan": "89f6fbe0033c942cb790ffd53ca93a45eeaf1c91", "versionType": "git"}, {"status": "affected", "version": "a6a6fe27bab48f0d09a64b051e7bde432fcae081", "lessThan": "dcd90f42a33e4220385f27b515183d0c91b2fc4a", "versionType": "git"}, {"status": "affected", "version": "a6a6fe27bab48f0d09a64b051e7bde432fcae081", "lessThan": "94d286fa5eedc550d42bcb9c85416af8f77736ff", "versionType": "git"}, {"status": "affected", "version": "a6a6fe27bab48f0d09a64b051e7bde432fcae081", "lessThan": "a3fdd924d88c30b9f488636ce0e4696012cf5511", "versionType": "git"}], "programFiles": ["net/smc/af_smc.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.18"}, {"status": "unaffected", "version": "0", "lessThan": "5.18", "versionType": "semver"}, {"status": "unaffected", "version": "6.1.176", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.143", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.94", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.36", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.0.13", "versionType": "semver", "lessThanOrEqual": "7.0.*"}, {"status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/smc/af_smc.c"], "defaultStatus": "affected"}]}], "published": "2026-06-25T09:16:45.577", "references": [{"url": "https://git.kernel.org/stable/c/35a22117839602bb52283de08894c5a7dde92420", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/5d27d2ffe487df89ce28fda0410eafa05dbe03a0", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/89f6fbe0033c942cb790ffd53ca93a45eeaf1c91", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/94d286fa5eedc550d42bcb9c85416af8f77736ff", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a3fdd924d88c30b9f488636ce0e4696012cf5511", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/dcd90f42a33e4220385f27b515183d0c91b2fc4a", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: fix sleep-inside-lock in __smc_setsockopt() causing local DoS\n\nA logic flaw in __smc_setsockopt() allows a local unprivileged user to\ncause a Denial of Service (DoS) by holding the socket lock indefinitely.\n\nThe function __smc_setsockopt() calls copy_from_sockptr() while holding\nlock_sock(sk). By passing a userfaultfd-monitored memory page (or\nFUSE-backed memory on systems where unprivileged userfaultfd is disabled)\nas the optval, an attacker can halt execution during the copy operation,\nkeeping the lock held.\n\nCombined with asynchronous tear-down operations like shutdown(), this\nexhausts the kernel wq (kworkers) and triggers the hung task watchdog.\n\n[ 240.123456] INFO: task kworker/u8:2 blocked for more than 120 seconds.\n[ 240.123489] Call Trace:\n[ 240.123501] smc_shutdown+...\n[ 240.123512] lock_sock_nested+...\n\nThis patch moves the user-space copy outside the lock_sock() critical\nsection to prevent the issue."}], "lastModified": "2026-07-08T04:00:43.930", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E993847F-F6CD-4FFE-A341-8A32051D3681", "versionEndExcluding": "6.1.176", "versionStartIncluding": "5.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9062F1CD-CAD6-4EA2-A73F-C06D4A887B8C", "versionEndExcluding": "6.6.143", "versionStartIncluding": "6.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "85421C0C-ABDE-4357-971C-67F9087DE1B9", "versionEndExcluding": "6.12.94", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "389025D2-958D-41BD-BD96-70ED1033A9F3", "versionEndExcluding": "6.18.36", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6A64BF9F-3BCA-42FD-98CB-8F03474D2B1E", "versionEndExcluding": "7.0.13", "versionStartIncluding": "6.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B1EF7059-E670-45F4-B422-54C40FA86390"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0D38F0BF-A728-4133-A358-D44A2F7EE6D6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "EC732D08-5F7B-46D9-B154-E60C7F4F0A97"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}