CVE-2025-38089

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-38089", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T04:51:23.982Z", "datePublished": "2025-06-30T07:29:44.836Z", "dateUpdated": "2026-10-15T21:52:07.767Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:59:25.591Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsunrpc: handle SVC_GARBAGE during svc auth processing as auth error\n\ntianshuo han reported a remotely-triggerable crash if the client sends a\nkernel RPC server a specially crafted packet. If decoding the RPC reply\nfails in such a way that SVC_GARBAGE is returned without setting the\nrq_accept_statp pointer, then that pointer can be dereferenced and a\nvalue stored there.\n\nIf it's the first time the thread has processed an RPC, then that\npointer will be set to NULL and the kernel will crash. In other cases,\nit could create a memory scribble.\n\nThe server sunrpc code treats a SVC_GARBAGE return from svc_authenticate\nor pg_authenticate as if it should send a GARBAGE_ARGS reply. RFC 5531\nsays that if authentication fails that the RPC should be rejected\ninstead with a status of AUTH_ERR.\n\nHandle a SVC_GARBAGE return as an AUTH_ERROR, with a reason of\nAUTH_BADCRED instead of returning GARBAGE_ARGS in that case. This\nsidesteps the whole problem of touching the rpc_accept_statp pointer in\nthis situation and avoids the crash."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL"}, "scenarios": [{"lang": "en", "value": "AV:N - The bug is in the shared kernel RPC server core (net/sunrpc/svc.c) used by nfsd, lockd, and the NFS callback service, and is triggered purely by the bytes of an inbound RPC call arriving on TCP/UDP 2049. Any host that can reach the listening socket, including across the internet, can send the malformed record.\nAC:L - The attacker sends a single truncated RPC message that ends before the credential flavor field; decode failure and the bad store are deterministic, with no race and no memory-layout precondition. Fresh nfsd threads (server start or pool growth) give the NULL-pointer variant reliably, and every other thread yields the write-after-free variant.\nPR:N - The crash occurs inside svc_authenticate() itself, before any credential is decoded and long before svc_set_client()/export checks, so no RPC credential, mount, or account is needed. A bare TCP connect to the RPC port is sufficient.\nUI:N - The server processes the malformed RPC automatically on receipt. No action by any local user or administrator is involved.\nS:U - The faulting store and its consequences are confined to the kernel's own memory and the RPC service; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - In the stale-pointer case this is a write into a freed and reallocated page, i.e. memory corruption of arbitrary kernel objects that can be groomed into that slot; corrupting a length or index field in a neighboring structure yields subsequent over-reads and disclosure of kernel memory.\nI:H - The vulnerable store writes a 32-bit value into a page that has already been released to the allocator and may hold any kernel object, at an offset the attacker can influence via the previous reply's verifier length. That is a remote pre-auth write-after-free primitive usable to corrupt pointers, credentials, or control data.\nA:H - The NULL-pointer variant oopses the nfsd kernel thread on the very first malformed RPC a thread sees, and can be repeated to kill the whole thread pool, taking down NFS service entirely (full panic where panic_on_oops is set). The write-after-free variant additionally causes unpredictable crashes in unrelated subsystems."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/sunrpc/svc.c"], "versions": [{"version": "29cd2927fb914cc53b5ba4f67d2b74695c994ba4", "lessThan": "599c489eea793821232a2f69a00fa57d82b0ac98", "status": "affected", "versionType": "git"}, {"version": "29cd2927fb914cc53b5ba4f67d2b74695c994ba4", "lessThan": "353e75b55e583635bf71cde6abcec274dba05edd", "status": "affected", "versionType": "git"}, {"version": "29cd2927fb914cc53b5ba4f67d2b74695c994ba4", "lessThan": "c90459cd58bb421d275337093d8e901e0ba748dd", "status": "affected", "versionType": "git"}, {"version": "29cd2927fb914cc53b5ba4f67d2b74695c994ba4", "lessThan": "94d10a4dba0bc482f2b01e39f06d5513d0f75742", "status": "affected", "versionType": "git"}, {"version": "9b59f5c4911e87264507e0934cd2bb277390c560", "status": "affected", "versionType": "git"}, {"version": "6.3.4", "lessThan": "6.4", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/sunrpc/svc.c"], "versions": [{"version": "6.4", "status": "affected"}, {"version": "0", "lessThan": "6.4", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.95", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.35", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.15.4", "lessThanOrEqual": "6.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.16", "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": "6.4", "versionEndExcluding": "6.6.95"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.12.35"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.15.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.16"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3.4"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/599c489eea793821232a2f69a00fa57d82b0ac98"}, {"url": "https://git.kernel.org/stable/c/353e75b55e583635bf71cde6abcec274dba05edd"}, {"url": "https://git.kernel.org/stable/c/c90459cd58bb421d275337093d8e901e0ba748dd"}, {"url": "https://git.kernel.org/stable/c/94d10a4dba0bc482f2b01e39f06d5513d0f75742"}, {"url": "https://www.openwall.com/lists/oss-security/2025/07/02/2"}, {"url": "https://github.com/keymaker-arch/NFSundown"}], "title": "sunrpc: handle SVC_GARBAGE during svc auth processing as auth error", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2025/07/02/2"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-04T21:10:10.064Z"}}, {"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2025-38089", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-15T21:47:14.648700Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-15T21:52:07.767Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2025/07/02/2"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-04T21:10:10.064Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2025-38089", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-15T21:47:14.648700Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-15T21:47:15.862Z"}}], "cna": {"title": "sunrpc: handle SVC_GARBAGE during svc auth processing as auth error", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 9.8, "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}, "scenarios": [{"lang": "en", "value": "AV:N - The bug is in the shared kernel RPC server core (net/sunrpc/svc.c) used by nfsd, lockd, and the NFS callback service, and is triggered purely by the bytes of an inbound RPC call arriving on TCP/UDP 2049. Any host that can reach the listening socket, including across the internet, can send the malformed record.\nAC:L - The attacker sends a single truncated RPC message that ends before the credential flavor field; decode failure and the bad store are deterministic, with no race and no memory-layout precondition. Fresh nfsd threads (server start or pool growth) give the NULL-pointer variant reliably, and every other thread yields the write-after-free variant.\nPR:N - The crash occurs inside svc_authenticate() itself, before any credential is decoded and long before svc_set_client()/export checks, so no RPC credential, mount, or account is needed. A bare TCP connect to the RPC port is sufficient.\nUI:N - The server processes the malformed RPC automatically on receipt. No action by any local user or administrator is involved.\nS:U - The faulting store and its consequences are confined to the kernel's own memory and the RPC service; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - In the stale-pointer case this is a write into a freed and reallocated page, i.e. memory corruption of arbitrary kernel objects that can be groomed into that slot; corrupting a length or index field in a neighboring structure yields subsequent over-reads and disclosure of kernel memory.\nI:H - The vulnerable store writes a 32-bit value into a page that has already been released to the allocator and may hold any kernel object, at an offset the attacker can influence via the previous reply's verifier length. That is a remote pre-auth write-after-free primitive usable to corrupt pointers, credentials, or control data.\nA:H - The NULL-pointer variant oopses the nfsd kernel thread on the very first malformed RPC a thread sees, and can be repeated to kill the whole thread pool, taking down NFS service entirely (full panic where panic_on_oops is set). The write-after-free variant additionally causes unpredictable crashes in unrelated subsystems."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "29cd2927fb914cc53b5ba4f67d2b74695c994ba4", "lessThan": "599c489eea793821232a2f69a00fa57d82b0ac98", "versionType": "git"}, {"status": "affected", "version": "29cd2927fb914cc53b5ba4f67d2b74695c994ba4", "lessThan": "353e75b55e583635bf71cde6abcec274dba05edd", "versionType": "git"}, {"status": "affected", "version": "29cd2927fb914cc53b5ba4f67d2b74695c994ba4", "lessThan": "c90459cd58bb421d275337093d8e901e0ba748dd", "versionType": "git"}, {"status": "affected", "version": "29cd2927fb914cc53b5ba4f67d2b74695c994ba4", "lessThan": "94d10a4dba0bc482f2b01e39f06d5513d0f75742", "versionType": "git"}, {"status": "affected", "version": "9b59f5c4911e87264507e0934cd2bb277390c560", "versionType": "git"}, {"status": "affected", "version": "6.3.4", "lessThan": "6.4", "versionType": "semver"}], "programFiles": ["net/sunrpc/svc.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.4"}, {"status": "unaffected", "version": "0", "lessThan": "6.4", "versionType": "semver"}, {"status": "unaffected", "version": "6.6.95", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.35", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.15.4", "versionType": "semver", "lessThanOrEqual": "6.15.*"}, {"status": "unaffected", "version": "6.16", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/sunrpc/svc.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/599c489eea793821232a2f69a00fa57d82b0ac98"}, {"url": "https://git.kernel.org/stable/c/353e75b55e583635bf71cde6abcec274dba05edd"}, {"url": "https://git.kernel.org/stable/c/c90459cd58bb421d275337093d8e901e0ba748dd"}, {"url": "https://git.kernel.org/stable/c/94d10a4dba0bc482f2b01e39f06d5513d0f75742"}, {"url": "https://www.openwall.com/lists/oss-security/2025/07/02/2"}, {"url": "https://github.com/keymaker-arch/NFSundown"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsunrpc: handle SVC_GARBAGE during svc auth processing as auth error\n\ntianshuo han reported a remotely-triggerable crash if the client sends a\nkernel RPC server a specially crafted packet. If decoding the RPC reply\nfails in such a way that SVC_GARBAGE is returned without setting the\nrq_accept_statp pointer, then that pointer can be dereferenced and a\nvalue stored there.\n\nIf it's the first time the thread has processed an RPC, then that\npointer will be set to NULL and the kernel will crash. In other cases,\nit could create a memory scribble.\n\nThe server sunrpc code treats a SVC_GARBAGE return from svc_authenticate\nor pg_authenticate as if it should send a GARBAGE_ARGS reply. RFC 5531\nsays that if authentication fails that the RPC should be rejected\ninstead with a status of AUTH_ERR.\n\nHandle a SVC_GARBAGE return as an AUTH_ERROR, with a reason of\nAUTH_BADCRED instead of returning GARBAGE_ARGS in that case. This\nsidesteps the whole problem of touching the rpc_accept_statp pointer in\nthis situation and avoids the crash."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.95", "versionStartIncluding": "6.4"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.35", "versionStartIncluding": "6.4"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.15.4", "versionStartIncluding": "6.4"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.16", "versionStartIncluding": "6.4"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "6.3.4"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:59:25.591Z"}}}, "cveMetadata": {"cveId": "CVE-2025-38089", "state": "PUBLISHED", "dateUpdated": "2026-10-15T21:52:07.767Z", "dateReserved": "2025-04-16T04:51:23.982Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2025-06-30T07:29:44.836Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/sunrpc/svc.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "599c489eea793821232a2f69a00fa57d82b0ac98", "status": "affected", "version": "29cd2927fb914cc53b5ba4f67d2b74695c994ba4", "versionType": "git"}, {"lessThan": "353e75b55e583635bf71cde6abcec274dba05edd", "status": "affected", "version": "29cd2927fb914cc53b5ba4f67d2b74695c994ba4", "versionType": "git"}, {"lessThan": "c90459cd58bb421d275337093d8e901e0ba748dd", "status": "affected", "version": "29cd2927fb914cc53b5ba4f67d2b74695c994ba4", "versionType": "git"}, {"lessThan": "94d10a4dba0bc482f2b01e39f06d5513d0f75742", "status": "affected", "version": "29cd2927fb914cc53b5ba4f67d2b74695c994ba4", "versionType": "git"}, {"status": "affected", "version": "9b59f5c4911e87264507e0934cd2bb277390c560", "versionType": "git"}, {"lessThan": "6.4", "status": "affected", "version": "6.3.4", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/sunrpc/svc.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.4"}, {"lessThan": "6.4", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.95", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.35", "versionType": "semver"}, {"lessThanOrEqual": "6.15.*", "status": "unaffected", "version": "6.15.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.16", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "A1C4BF07-55E0-4ECE-B2BC-1C398FA64210", "versionEndExcluding": "6.4", "versionStartIncluding": "6.3.4", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "11910915-534C-47AA-B830-C8FED7561895", "versionEndExcluding": "6.6.95", "versionStartIncluding": "6.4.1", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "E569FD34-0076-4428-BE17-EECCF867611C", "versionEndExcluding": "6.12.35", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "DFD174C5-1AA2-4671-BDDC-1A9FCC753655", "versionEndExcluding": "6.15.4", "versionStartIncluding": "6.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.4:-:*:*:*:*:*:*", "matchCriteriaId": "DE0B0BF6-0EEF-4FAD-927D-7A0DD77BEE75", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.4:rc3:*:*:*:*:*:*", "matchCriteriaId": "A717BA5B-D535-46A0-A329-A25FE5CEC588", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.4:rc4:*:*:*:*:*:*", "matchCriteriaId": "89CC80C6-F1EE-4AC7-BD21-DB3217BADE87", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.4:rc5:*:*:*:*:*:*", "matchCriteriaId": "41EACEA1-FB69-4AF2-BC52-D39489858D42", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.4:rc6:*:*:*:*:*:*", "matchCriteriaId": "9E1C36BE-F9D8-40B6-8281-5B8F9B42322D", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.4:rc7:*:*:*:*:*:*", "matchCriteriaId": "1D6CAA59-F0EF-4E0B-8C23-EC9535008572", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.16:rc1:*:*:*:*:*:*", "matchCriteriaId": "6D4894DB-CCFE-4602-B1BF-3960B2E19A01", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.16:rc2:*:*:*:*:*:*", "matchCriteriaId": "09709862-E348-4378-8632-5A7813EDDC86", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsunrpc: handle SVC_GARBAGE during svc auth processing as auth error\n\ntianshuo han reported a remotely-triggerable crash if the client sends a\nkernel RPC server a specially crafted packet. If decoding the RPC reply\nfails in such a way that SVC_GARBAGE is returned without setting the\nrq_accept_statp pointer, then that pointer can be dereferenced and a\nvalue stored there.\n\nIf it's the first time the thread has processed an RPC, then that\npointer will be set to NULL and the kernel will crash. In other cases,\nit could create a memory scribble.\n\nThe server sunrpc code treats a SVC_GARBAGE return from svc_authenticate\nor pg_authenticate as if it should send a GARBAGE_ARGS reply. RFC 5531\nsays that if authentication fails that the RPC should be rejected\ninstead with a status of AUTH_ERR.\n\nHandle a SVC_GARBAGE return as an AUTH_ERROR, with a reason of\nAUTH_BADCRED instead of returning GARBAGE_ARGS in that case. This\nsidesteps the whole problem of touching the rpc_accept_statp pointer in\nthis situation and avoids the crash."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: sunrpc: manejo de SVC_GARBAGE durante el procesamiento de autenticaci\u00f3n de servicio como error de autenticaci\u00f3n. Tianshuo Han inform\u00f3 de un fallo que se puede activar de forma remota si el cliente env\u00eda a un servidor RPC del kernel un paquete especialmente manipulado. Si la decodificaci\u00f3n de la respuesta RPC falla de tal manera que se devuelve SVC_GARBAGE sin establecer el puntero rq_accept_statp, se puede desreferenciar ese puntero y almacenar un valor all\u00ed. Si es la primera vez que el hilo procesa una RPC, ese puntero se establecer\u00e1 en NULL y el kernel se bloquear\u00e1. En otros casos, podr\u00eda crear un garabato de memoria. El c\u00f3digo del servidor sunrpc trata una devoluci\u00f3n de SVC_GARBAGE de svc_authenticate o pg_authenticate como si debiera enviar una respuesta GARBAGE_ARGS. El RFC 5531 indica que si la autenticaci\u00f3n falla, la RPC debe rechazarse con un estado de AUTH_ERR. Tratar una devoluci\u00f3n de SVC_GARBAGE como AUTH_ERROR, con el motivo AUTH_BADCRED, en lugar de devolver GARBAGE_ARGS en ese caso. Esto evita el problema de tocar el puntero rpc_accept_statp en esta situaci\u00f3n y evita el bloqueo."}], "id": "CVE-2025-38089", "lastModified": "2026-10-15T22:18:26.343", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-38089", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-15T21:47:14.648700Z", "version": "2.0.3"}}]}, "published": "2025-06-30T08:15:23.590", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/353e75b55e583635bf71cde6abcec274dba05edd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/599c489eea793821232a2f69a00fa57d82b0ac98"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/94d10a4dba0bc482f2b01e39f06d5513d0f75742"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c90459cd58bb421d275337093d8e901e0ba748dd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Exploit", "Patch"], "url": "https://github.com/keymaker-arch/NFSundown"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Mailing List"], "url": "https://www.openwall.com/lists/oss-security/2025/07/02/2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List"], "url": "http://www.openwall.com/lists/oss-security/2025/07/02/2"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: sunrpc: handle SVC_GARBAGE during svc auth processing as auth error", "id": "2375529", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2375529"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.1", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H", "status": "draft"}, "cwe": "CWE-99", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nsunrpc: handle SVC_GARBAGE during svc auth processing as auth error\ntianshuo han reported a remotely-triggerable crash if the client sends a\nkernel RPC server a specially crafted packet. If decoding the RPC reply\nfails in such a way that SVC_GARBAGE is returned without setting the\nrq_accept_statp pointer, then that pointer can be dereferenced and a\nvalue stored there.\nIf it's the first time the thread has processed an RPC, then that\npointer will be set to NULL and the kernel will crash. In other cases,\nit could create a memory scribble.\nThe server sunrpc code treats a SVC_GARBAGE return from svc_authenticate\nor pg_authenticate as if it should send a GARBAGE_ARGS reply. RFC 5531\nsays that if authentication fails that the RPC should be rejected\ninstead with a status of AUTH_ERR.\nHandle a SVC_GARBAGE return as an AUTH_ERROR, with a reason of\nAUTH_BADCRED instead of returning GARBAGE_ARGS in that case. This\nsidesteps the whole problem of touching the rpc_accept_statp pointer in\nthis situation and avoids the crash."], "mitigation": {"lang": "en:us", "value": "Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible. Additionally, to protect against this and other similar vulnerabilities, ensure appropriate access controls are in place to prevent unauthorized use of RPC-based services."}, "name": "CVE-2025-38089", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-06-30T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-38089\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-38089\nhttps://lore.kernel.org/linux-cve-announce/2025063055-CVE-2025-38089-0a36@gregkh/T"], "statement": "This vulnerability is caused by incorrect error handling in the Linux kernel's RPC code. When a malformed packet is sent during RPC authentication, the kernel does not correctly set an authorization status field pointer to a sensible value. When that pointer is later dereferenced, an affected system might either crash due to a null pointer dereference, or garbage data might be written to another memory address, impacting system integrity.", "threat_severity": "Important"}

{"created": "2025-07-06T22:16:26.876610+00:00", "updated": "2025-07-06T22:16:26.876664+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}