CVE-2025-71120 (GCVE-0-2025-71120)
Vulnerability from cvelistv5 – Published: 2026-01-14 15:06 – Updated: 2026-01-14 15:06
VLAI?
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 ?
No CVSS data available.
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
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) |
||
{
"containers": {
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"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"net/sunrpc/auth_gss/svcauth_gss.c"
],
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},
{
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},
{
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],
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"vendor": "Linux",
"versions": [
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"version": "5.5"
},
{
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"status": "unaffected",
"version": "0",
"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-rc3",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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},
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{
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}
],
"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."
}
],
"providerMetadata": {
"dateUpdated": "2026-01-14T15:06:07.194Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"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": {
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}
}
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"cveMetadata": {
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"assignerShortName": "Linux",
"cveId": "CVE-2025-71120",
"datePublished": "2026-01-14T15:06:07.194Z",
"dateReserved": "2026-01-13T15:30:19.654Z",
"dateUpdated": "2026-01-14T15:06:07.194Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2025-71120\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-01-14T15:16:01.690\",\"lastModified\":\"2026-01-14T16:25:12.057\",\"vulnStatus\":\"Awaiting Analysis\",\"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.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1c8bb965e9b0559ff0f5690615a527c30f651dd8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7452d53f293379e2c38cfa8ad0694aa46fc4788b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a2c6f25ab98b423f99ccd94874d655b8bcb01a19\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d4b69a6186b215d2dc1ebcab965ed88e8d41768d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f9e53f69ac3bc4ef568b08d3542edac02e83fefd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
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Sightings
| Author | Source | Type | Date |
|---|
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.
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