{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-38618", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T04:51:24.029Z", "datePublished": "2025-08-22T13:01:24.678Z", "dateUpdated": "2026-08-05T12:03:33.962Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:03:33.962Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvsock: Do not allow binding to VMADDR_PORT_ANY\n\nIt is possible for a vsock to autobind to VMADDR_PORT_ANY. This can\ncause a use-after-free when a connection is made to the bound socket.\nThe socket returned by accept() also has port VMADDR_PORT_ANY but is not\non the list of unbound sockets. Binding it will result in an extra\nrefcount decrement similar to the one fixed in fcdd2242c023 (vsock: Keep\nthe binding until socket destruction).\n\nModify the check in __vsock_bind_connectible() to also prevent binding\nto VMADDR_PORT_ANY." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The vulnerability is triggered through the bind() syscall on an AF_VSOCK socket; vsock is a local socket interface with no remote network reachability, so the attacker needs local system access.\nAC:L - The accept()-based trigger is fully deterministic — create a loopback vsock listener, connect, accept, then bind the accepted socket to VMADDR_PORT_ANY to force the extra sock_put; no race or uncontrolled condition is required.\nPR:L - Any unprivileged local user can create AF_VSOCK sockets and use the loopback (VMADDR_CID_LOCAL) transport; the autobind path performs no capability check, so only basic user privileges are needed.\nUI:N - The entire sequence is performed by the attacker's own process via syscalls; no action by any other user is required.\nS:U - The use-after-free corrupts kernel memory within the same kernel security authority and does not cross a VM/hypervisor or IOMMU boundary.\nC:H - A use-after-free of the struct sock lets the attacker reclaim the freed object with controlled data, enabling arbitrary kernel memory disclosure.\nI:H - The UAF/refcount underflow enables heap grooming and write primitives over the reclaimed object, permitting kernel memory modification and potential control-flow hijack.\nA:H - The refcount underflow frees a still-referenced socket, causing use-after-free access that reliably crashes/panics the kernel." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/vmw_vsock/af_vsock.c" ], "versions": [ { "version": "d021c344051af91f42c5ba9fdedc176740cbd238", "lessThan": "c04a2c1ca25b9b23104124d3b2d349d934e302de", "status": "affected", "versionType": "git" }, { "version": "d021c344051af91f42c5ba9fdedc176740cbd238", "lessThan": "d1a5b1964cef42727668ac0d8532dae4f8c19386", "status": "affected", "versionType": "git" }, { "version": "d021c344051af91f42c5ba9fdedc176740cbd238", "lessThan": "cf86704798c1b9c46fa59dfc2d662f57d1394d79", "status": "affected", "versionType": "git" }, { "version": "d021c344051af91f42c5ba9fdedc176740cbd238", "lessThan": "f138be5d7f301fddad4e65ec66dfc3ceebf79be3", "status": "affected", "versionType": "git" }, { "version": "d021c344051af91f42c5ba9fdedc176740cbd238", "lessThan": "44bd006d5c93f6a8f28b106cbae2428c5d0275b7", "status": "affected", "versionType": "git" }, { "version": "d021c344051af91f42c5ba9fdedc176740cbd238", "lessThan": "32950b1907919be86a7a2697d6f93d57068b3865", "status": "affected", "versionType": "git" }, { "version": "d021c344051af91f42c5ba9fdedc176740cbd238", "lessThan": "8f01093646b49f6330bb2d36761983fd829472b1", "status": "affected", "versionType": "git" }, { "version": "d021c344051af91f42c5ba9fdedc176740cbd238", "lessThan": "d73960f0cf03ef1dc9e96ec7a20e538accc26d87", "status": "affected", "versionType": "git" }, { "version": "d021c344051af91f42c5ba9fdedc176740cbd238", "lessThan": "aba0c94f61ec05315fa7815d21aefa4c87f6a9f4", "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/vmw_vsock/af_vsock.c" ], "versions": [ { "version": "3.9", "status": "affected" }, { "version": "0", "lessThan": "3.9", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.297", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.241", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.190", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.148", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.102", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.42", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.15.10", "lessThanOrEqual": "6.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.16.1", "lessThanOrEqual": "6.16.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.17", "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": "3.9", "versionEndExcluding": "5.4.297" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.9", "versionEndExcluding": "5.10.241" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.9", "versionEndExcluding": "5.15.190" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.9", "versionEndExcluding": "6.1.148" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.9", "versionEndExcluding": "6.6.102" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.9", "versionEndExcluding": "6.12.42" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.9", "versionEndExcluding": "6.15.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.9", "versionEndExcluding": "6.16.1" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.9", "versionEndExcluding": "6.17" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/c04a2c1ca25b9b23104124d3b2d349d934e302de" }, { "url": "https://git.kernel.org/stable/c/d1a5b1964cef42727668ac0d8532dae4f8c19386" }, { "url": "https://git.kernel.org/stable/c/cf86704798c1b9c46fa59dfc2d662f57d1394d79" }, { "url": "https://git.kernel.org/stable/c/f138be5d7f301fddad4e65ec66dfc3ceebf79be3" }, { "url": "https://git.kernel.org/stable/c/44bd006d5c93f6a8f28b106cbae2428c5d0275b7" }, { "url": "https://git.kernel.org/stable/c/32950b1907919be86a7a2697d6f93d57068b3865" }, { "url": "https://git.kernel.org/stable/c/8f01093646b49f6330bb2d36761983fd829472b1" }, { "url": "https://git.kernel.org/stable/c/d73960f0cf03ef1dc9e96ec7a20e538accc26d87" }, { "url": "https://git.kernel.org/stable/c/aba0c94f61ec05315fa7815d21aefa4c87f6a9f4" } ], "title": "vsock: Do not allow binding to VMADDR_PORT_ANY", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html" }, { "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T17:40:30.483Z" } }, { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2025-38618", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2026-06-10T20:42:30.337631Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-11T18:44:23.948Z" } } ] } }