CVE-2025-71120 (GCVE-0-2025-71120)
Vulnerability from cvelistv5 – Published: 2026-01-14 15:06 – Updated: 2026-09-08 08:43
VLAI
EPSS
VEX
Title
SUNRPC: svcauth_gss: avoid NULL deref on zero length gss_token in gss_read_proxy_verf
Summary
In the Linux kernel, the following vulnerability has been resolved:
SUNRPC: svcauth_gss: avoid NULL deref on zero length gss_token in gss_read_proxy_verf
A zero length gss_token results in pages == 0 and in_token->pages[0]
is NULL. The code unconditionally evaluates
page_address(in_token->pages[0]) for the initial memcpy, which can
dereference NULL even when the copy length is 0. Guard the first
memcpy so it only runs when length > 0.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-10 20:42 UTC
Assigner
References
8 references
Impacted products
5 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
5866efa8cbfbadf3905072798e96652faf02dbe8 , < a8f1e445ce3545c90d69c9e8ff8f7821825fe810
(git)
Affected: 5866efa8cbfbadf3905072798e96652faf02dbe8 , < 4dedb6a11243a5c9eb9dbb97bca3c98bd725e83d (git) Affected: 5866efa8cbfbadf3905072798e96652faf02dbe8 , < f9e53f69ac3bc4ef568b08d3542edac02e83fefd (git) Affected: 5866efa8cbfbadf3905072798e96652faf02dbe8 , < 7452d53f293379e2c38cfa8ad0694aa46fc4788b (git) Affected: 5866efa8cbfbadf3905072798e96652faf02dbe8 , < a2c6f25ab98b423f99ccd94874d655b8bcb01a19 (git) Affected: 5866efa8cbfbadf3905072798e96652faf02dbe8 , < 1c8bb965e9b0559ff0f5690615a527c30f651dd8 (git) Affected: 5866efa8cbfbadf3905072798e96652faf02dbe8 , < d4b69a6186b215d2dc1ebcab965ed88e8d41768d (git) Affected: 66ed7b413d31c6ff23901ac4443b1cc1af2f6113 (git) Affected: 7be8c165dc81564705e8e0b72d398ef708f67eaa (git) Affected: 4.19.99 , < 4.20 (semver) Affected: 5.4.15 , < 5.5 (semver) |
guessed | |
| Linux | Linux |
Affected:
5.5
Unaffected: 0 , < 5.5 (semver) Unaffected: 5.10.248 , ≤ 5.10.* (semver) Unaffected: 5.15.198 , ≤ 5.15.* (semver) Unaffected: 6.1.160 , ≤ 6.1.* (semver) Unaffected: 6.6.120 , ≤ 6.6.* (semver) Unaffected: 6.12.64 , ≤ 6.12.* (semver) Unaffected: 6.18.3 , ≤ 6.18.* (semver) Unaffected: 6.19 , ≤ * (original_commit_for_fix) |
guessed | |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.6 , < *
(custom)
|
guessed | |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP |
Affected:
V3.1.6 , < *
(custom)
|
guessed | |
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.6 , < *
(custom)
|
guessed |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2025-71120",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-06-10T20:42:25.150500Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-06-11T18:44:22.946Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
},
{
"affected": [
{
"defaultStatus": "unknown",
"product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP",
"vendor": "Siemens",
"versions": [
{
"lessThan": "*",
"status": "affected",
"version": "V3.1.6",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP",
"vendor": "Siemens",
"versions": [
{
"lessThan": "*",
"status": "affected",
"version": "V3.1.6",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP",
"vendor": "Siemens",
"versions": [
{
"lessThan": "*",
"status": "affected",
"version": "V3.1.6",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP",
"vendor": "Siemens",
"versions": [
{
"lessThan": "*",
"status": "affected",
"version": "V3.1.6",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP",
"vendor": "Siemens",
"versions": [
{
"lessThan": "*",
"status": "affected",
"version": "V3.1.6",
"versionType": "custom"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-08T08:43:58.946Z",
"orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
"shortName": "siemens-SADP"
},
"references": [
{
"url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"
}
],
"x_adpType": "supplier"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"net/sunrpc/auth_gss/svcauth_gss.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "a8f1e445ce3545c90d69c9e8ff8f7821825fe810",
"status": "affected",
"version": "5866efa8cbfbadf3905072798e96652faf02dbe8",
"versionType": "git"
},
{
"lessThan": "4dedb6a11243a5c9eb9dbb97bca3c98bd725e83d",
"status": "affected",
"version": "5866efa8cbfbadf3905072798e96652faf02dbe8",
"versionType": "git"
},
{
"lessThan": "f9e53f69ac3bc4ef568b08d3542edac02e83fefd",
"status": "affected",
"version": "5866efa8cbfbadf3905072798e96652faf02dbe8",
"versionType": "git"
},
{
"lessThan": "7452d53f293379e2c38cfa8ad0694aa46fc4788b",
"status": "affected",
"version": "5866efa8cbfbadf3905072798e96652faf02dbe8",
"versionType": "git"
},
{
"lessThan": "a2c6f25ab98b423f99ccd94874d655b8bcb01a19",
"status": "affected",
"version": "5866efa8cbfbadf3905072798e96652faf02dbe8",
"versionType": "git"
},
{
"lessThan": "1c8bb965e9b0559ff0f5690615a527c30f651dd8",
"status": "affected",
"version": "5866efa8cbfbadf3905072798e96652faf02dbe8",
"versionType": "git"
},
{
"lessThan": "d4b69a6186b215d2dc1ebcab965ed88e8d41768d",
"status": "affected",
"version": "5866efa8cbfbadf3905072798e96652faf02dbe8",
"versionType": "git"
},
{
"status": "affected",
"version": "66ed7b413d31c6ff23901ac4443b1cc1af2f6113",
"versionType": "git"
},
{
"status": "affected",
"version": "7be8c165dc81564705e8e0b72d398ef708f67eaa",
"versionType": "git"
},
{
"lessThan": "4.20",
"status": "affected",
"version": "4.19.99",
"versionType": "semver"
},
{
"lessThan": "5.5",
"status": "affected",
"version": "5.4.15",
"versionType": "semver"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"net/sunrpc/auth_gss/svcauth_gss.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.5"
},
{
"lessThan": "5.5",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.248",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.198",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.160",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.120",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.64",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.3",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.19",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.248",
"versionStartIncluding": "5.5",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.198",
"versionStartIncluding": "5.5",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.160",
"versionStartIncluding": "5.5",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.120",
"versionStartIncluding": "5.5",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.64",
"versionStartIncluding": "5.5",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.3",
"versionStartIncluding": "5.5",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.19",
"versionStartIncluding": "5.5",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.19.99",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.4.15",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nSUNRPC: svcauth_gss: avoid NULL deref on zero length gss_token in gss_read_proxy_verf\n\nA zero length gss_token results in pages == 0 and in_token-\u003epages[0]\nis NULL. The code unconditionally evaluates\npage_address(in_token-\u003epages[0]) for the initial memcpy, which can\ndereference NULL even when the copy length is 0. Guard the first\nmemcpy so it only runs when length \u003e 0."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.5,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:N - An unauthenticated remote client can send an RPCSEC_GSS INIT request with a zero-length token to a network-facing kernel SUNRPC service using gss-proxy.\nAC:L - A single crafted request deterministically produces zero pages and a NULL first-page pointer; no race, timing, or memory shaping is required.\nPR:N - The fault occurs during pre-authentication GSS context establishment, before Kerberos validation, export authorization, reserved-port checks, or the gss-proxy upcall.\nUI:N - Once the affected SUNRPC service and gss-proxy backend are running, exploitation requires no action by a victim.\nS:U - The fault affects the same host kernel and RPC service processing the malicious request and does not cross a virtualization or IOMMU boundary.\nC:N - The zero-length operation copies no bytes and exposes no kernel memory.\nI:N - No bytes are written and no memory corruption or attacker-controlled modification occurs.\nA:H - Evaluating page_address on the NULL page can cause a kernel oops or panic, and unauthenticated requests can be repeated to kill workers or deny service."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-05T12:12:11.294Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/a8f1e445ce3545c90d69c9e8ff8f7821825fe810"
},
{
"url": "https://git.kernel.org/stable/c/4dedb6a11243a5c9eb9dbb97bca3c98bd725e83d"
},
{
"url": "https://git.kernel.org/stable/c/f9e53f69ac3bc4ef568b08d3542edac02e83fefd"
},
{
"url": "https://git.kernel.org/stable/c/7452d53f293379e2c38cfa8ad0694aa46fc4788b"
},
{
"url": "https://git.kernel.org/stable/c/a2c6f25ab98b423f99ccd94874d655b8bcb01a19"
},
{
"url": "https://git.kernel.org/stable/c/1c8bb965e9b0559ff0f5690615a527c30f651dd8"
},
{
"url": "https://git.kernel.org/stable/c/d4b69a6186b215d2dc1ebcab965ed88e8d41768d"
}
],
"title": "SUNRPC: svcauth_gss: avoid NULL deref on zero length gss_token in gss_read_proxy_verf",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2025-71120",
"datePublished": "2026-01-14T15:06:07.194Z",
"dateReserved": "2026-01-13T15:30:19.654Z",
"dateUpdated": "2026-09-08T08:43:58.946Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2025-71120",
"date": "2026-09-14",
"epss": "0.00484",
"percentile": "0.40268"
},
"microsoft_vex": {
"current_release_date": "2026-02-18T14:48:45.000Z",
"cve": "CVE-2025-71120",
"id": "msrc_CVE-2025-71120",
"initial_release_date": "2026-01-02T00:00:00.000Z",
"product_status:fixed": "1",
"product_status:known_affected": "2",
"source": "Microsoft CSAF VEX",
"status": "final",
"title": "SUNRPC: svcauth_gss: avoid NULL deref on zero length gss_token in gss_read_proxy_verf",
"url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2025-71120.json",
"version": "3"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2025-71120\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-01-14T15:16:01.690\",\"lastModified\":\"2026-07-30T06:24:52.050\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nSUNRPC: svcauth_gss: avoid NULL deref on zero length gss_token in gss_read_proxy_verf\\n\\nA zero length gss_token results in pages == 0 and in_token-\u003epages[0]\\nis NULL. The code unconditionally evaluates\\npage_address(in_token-\u003epages[0]) for the initial memcpy, which can\\ndereference NULL even when the copy length is 0. Guard the first\\nmemcpy so it only runs when length \u003e 0.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\\n\\nSUNRPC: svcauth_gss: evitar desreferenciaci\u00f3n de NULL en gss_token de longitud cero en gss_read_proxy_verf\\n\\nUn gss_token de longitud cero resulta en pages == 0 y in_token-\u0026gt;pages[0] es NULL. El c\u00f3digo eval\u00faa incondicionalmente page_address(in_token-\u0026gt;pages[0]) para el memcpy inicial, lo que puede desreferenciar NULL incluso cuando la longitud de la copia es 0. Proteger el primer memcpy para que solo se ejecute cuando length \u0026gt; 0.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/sunrpc/auth_gss/svcauth_gss.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5866efa8cbfbadf3905072798e96652faf02dbe8\",\"lessThan\":\"a8f1e445ce3545c90d69c9e8ff8f7821825fe810\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5866efa8cbfbadf3905072798e96652faf02dbe8\",\"lessThan\":\"4dedb6a11243a5c9eb9dbb97bca3c98bd725e83d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5866efa8cbfbadf3905072798e96652faf02dbe8\",\"lessThan\":\"f9e53f69ac3bc4ef568b08d3542edac02e83fefd\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5866efa8cbfbadf3905072798e96652faf02dbe8\",\"lessThan\":\"7452d53f293379e2c38cfa8ad0694aa46fc4788b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5866efa8cbfbadf3905072798e96652faf02dbe8\",\"lessThan\":\"a2c6f25ab98b423f99ccd94874d655b8bcb01a19\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5866efa8cbfbadf3905072798e96652faf02dbe8\",\"lessThan\":\"1c8bb965e9b0559ff0f5690615a527c30f651dd8\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5866efa8cbfbadf3905072798e96652faf02dbe8\",\"lessThan\":\"d4b69a6186b215d2dc1ebcab965ed88e8d41768d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"66ed7b413d31c6ff23901ac4443b1cc1af2f6113\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7be8c165dc81564705e8e0b72d398ef708f67eaa\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4.19.99\",\"lessThan\":\"4.20\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.4.15\",\"lessThan\":\"5.5\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/sunrpc/auth_gss/svcauth_gss.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.5\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.5\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.248\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.198\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.160\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.120\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.64\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.3\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.19\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]},{\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\",\"affectedData\":[{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"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\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-06-10T20:42:25.150500Z\",\"id\":\"CVE-2025-71120\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.19.99\",\"versionEndExcluding\":\"4.20\",\"matchCriteriaId\":\"97340910-B0B6-42CC-B4FA-E277DFB61C71\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.4.15\",\"versionEndExcluding\":\"5.5\",\"matchCriteriaId\":\"AD6E1663-093D-4E18-9656-976DFB4012F6\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5.1\",\"versionEndExcluding\":\"5.10.248\",\"matchCriteriaId\":\"6CAA2035-2245-429B-8FD3-733689D62A54\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.198\",\"matchCriteriaId\":\"82159CAA-B6BA-43C6-85D8-65BDBC175A7E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.160\",\"matchCriteriaId\":\"C10CC03E-16A9-428A-B449-40D3763E15F6\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.120\",\"matchCriteriaId\":\"43C3A206-5EEE-417B-AA0F-EF8972E7A9F0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.64\",\"matchCriteriaId\":\"32BF4A52-377C-44ED-B5E6-7EA5D896E98B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.18.3\",\"matchCriteriaId\":\"2DC484D8-FB4F-4112-900F-AE333B6FE7A7\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.5:-:*:*:*:*:*:*\",\"matchCriteriaId\":\"EE98F46A-F7D9-4609-B6A0-882E7F0D378C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"17B67AA7-40D6-4AFA-8459-F200F3D7CFD1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"C47E4CC9-C826-4FA9-B014-7FE3D9B318B2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"F71D92C0-C023-48BD-B3B6-70B638EEE298\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"13580667-0A98-40CC-B29F-D12790B91BDB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"CAD1FED7-CF48-47BF-AC7D-7B6FA3C065FC\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"3EF854A1-ABB1-4E93-BE9A-44569EC76C0D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc7:*:*:*:*:*:*\",\"matchCriteriaId\":\"F5DC0CA6-F0AF-4DDF-A882-3DADB9A886A7\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc8:*:*:*:*:*:*\",\"matchCriteriaId\":\"EB5B7DFC-C36B-45D8-922C-877569FDDF43\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1c8bb965e9b0559ff0f5690615a527c30f651dd8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/4dedb6a11243a5c9eb9dbb97bca3c98bd725e83d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/7452d53f293379e2c38cfa8ad0694aa46fc4788b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/a2c6f25ab98b423f99ccd94874d655b8bcb01a19\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/a8f1e445ce3545c90d69c9e8ff8f7821825fe810\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d4b69a6186b215d2dc1ebcab965ed88e8d41768d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f9e53f69ac3bc4ef568b08d3542edac02e83fefd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://cert-portal.siemens.com/productcert/html/ssa-019113.html\",\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\"}]}}",
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-07-30T08:32:46+00:00",
"cve": "CVE-2025-71120",
"id": "CVE-2025-71120",
"initial_release_date": "2025-01-01T00:00:00+00:00",
"product_status:known_affected": "48",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: Linux kernel: Denial of Service in SUNRPC via zero-length gss_token",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-71120.json",
"version": "3"
},
"vulnrichment": {
"containers": "{\"adp\": [{\"affected\": [{\"vendor\": \"Siemens\", \"product\": \"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP\", \"versions\": [{\"status\": \"affected\", \"version\": \"V3.1.6\", \"lessThan\": \"*\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unknown\"}, {\"vendor\": \"Siemens\", \"product\": \"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP\", \"versions\": [{\"status\": \"affected\", \"version\": \"V3.1.6\", \"lessThan\": \"*\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unknown\"}, {\"vendor\": \"Siemens\", \"product\": \"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP\", \"versions\": [{\"status\": \"affected\", \"version\": \"V3.1.6\", \"lessThan\": \"*\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unknown\"}, {\"vendor\": \"Siemens\", \"product\": \"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP\", \"versions\": [{\"status\": \"affected\", \"version\": \"V3.1.6\", \"lessThan\": \"*\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unknown\"}, {\"vendor\": \"Siemens\", \"product\": \"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP\", \"versions\": [{\"status\": \"affected\", \"version\": \"V3.1.6\", \"lessThan\": \"*\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unknown\"}], \"x_adpType\": \"supplier\", \"references\": [{\"url\": \"https://cert-portal.siemens.com/productcert/html/ssa-019113.html\"}], \"providerMetadata\": {\"orgId\": \"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\", \"shortName\": \"siemens-SADP\", \"dateUpdated\": \"2026-09-08T08:43:58.946Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-71120\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-06-10T20:42:25.150500Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-06-11T17:39:23.386Z\"}}], \"cna\": {\"title\": \"SUNRPC: svcauth_gss: avoid NULL deref on zero length gss_token in gss_read_proxy_verf\", \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 7.5, \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"AV:N - An unauthenticated remote client can send an RPCSEC_GSS INIT request with a zero-length token to a network-facing kernel SUNRPC service using gss-proxy.\\nAC:L - A single crafted request deterministically produces zero pages and a NULL first-page pointer; no race, timing, or memory shaping is required.\\nPR:N - The fault occurs during pre-authentication GSS context establishment, before Kerberos validation, export authorization, reserved-port checks, or the gss-proxy upcall.\\nUI:N - Once the affected SUNRPC service and gss-proxy backend are running, exploitation requires no action by a victim.\\nS:U - The fault affects the same host kernel and RPC service processing the malicious request and does not cross a virtualization or IOMMU boundary.\\nC:N - The zero-length operation copies no bytes and exposes no kernel memory.\\nI:N - No bytes are written and no memory corruption or attacker-controlled modification occurs.\\nA:H - Evaluating page_address on the NULL page can cause a kernel oops or panic, and unauthenticated requests can be repeated to kill workers or deny service.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5866efa8cbfbadf3905072798e96652faf02dbe8\", \"lessThan\": \"a8f1e445ce3545c90d69c9e8ff8f7821825fe810\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"5866efa8cbfbadf3905072798e96652faf02dbe8\", \"lessThan\": \"4dedb6a11243a5c9eb9dbb97bca3c98bd725e83d\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"5866efa8cbfbadf3905072798e96652faf02dbe8\", \"lessThan\": \"f9e53f69ac3bc4ef568b08d3542edac02e83fefd\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"5866efa8cbfbadf3905072798e96652faf02dbe8\", \"lessThan\": \"7452d53f293379e2c38cfa8ad0694aa46fc4788b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"5866efa8cbfbadf3905072798e96652faf02dbe8\", \"lessThan\": \"a2c6f25ab98b423f99ccd94874d655b8bcb01a19\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"5866efa8cbfbadf3905072798e96652faf02dbe8\", \"lessThan\": \"1c8bb965e9b0559ff0f5690615a527c30f651dd8\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"5866efa8cbfbadf3905072798e96652faf02dbe8\", \"lessThan\": \"d4b69a6186b215d2dc1ebcab965ed88e8d41768d\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"66ed7b413d31c6ff23901ac4443b1cc1af2f6113\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"7be8c165dc81564705e8e0b72d398ef708f67eaa\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"4.19.99\", \"lessThan\": \"4.20\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"5.4.15\", \"lessThan\": \"5.5\", \"versionType\": \"semver\"}], \"programFiles\": [\"net/sunrpc/auth_gss/svcauth_gss.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.5\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.5\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.248\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.198\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.160\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.120\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.64\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.18.3\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.18.*\"}, {\"status\": \"unaffected\", \"version\": \"6.19\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/sunrpc/auth_gss/svcauth_gss.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/a8f1e445ce3545c90d69c9e8ff8f7821825fe810\"}, {\"url\": \"https://git.kernel.org/stable/c/4dedb6a11243a5c9eb9dbb97bca3c98bd725e83d\"}, {\"url\": \"https://git.kernel.org/stable/c/f9e53f69ac3bc4ef568b08d3542edac02e83fefd\"}, {\"url\": \"https://git.kernel.org/stable/c/7452d53f293379e2c38cfa8ad0694aa46fc4788b\"}, {\"url\": \"https://git.kernel.org/stable/c/a2c6f25ab98b423f99ccd94874d655b8bcb01a19\"}, {\"url\": \"https://git.kernel.org/stable/c/1c8bb965e9b0559ff0f5690615a527c30f651dd8\"}, {\"url\": \"https://git.kernel.org/stable/c/d4b69a6186b215d2dc1ebcab965ed88e8d41768d\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nSUNRPC: svcauth_gss: avoid NULL deref on zero length gss_token in gss_read_proxy_verf\\n\\nA zero length gss_token results in pages == 0 and in_token-\u003epages[0]\\nis NULL. The code unconditionally evaluates\\npage_address(in_token-\u003epages[0]) for the initial memcpy, which can\\ndereference NULL even when the copy length is 0. Guard the first\\nmemcpy so it only runs when length \u003e 0.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.248\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.198\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.160\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.120\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.64\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.18.3\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.19\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"4.19.99\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"5.4.15\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T12:12:11.294Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2025-71120\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-09-08T08:43:58.946Z\", \"dateReserved\": \"2026-01-13T15:30:19.654Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2026-01-14T15:06:07.194Z\", \"assignerShortName\": \"Linux\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Loading…
Loading…