CVE-2025-71120 (GCVE-0-2025-71120)
Vulnerability from cvelistv5
Published
2026-01-14 15:06
Modified
2026-08-05 12:12
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: 5866efa8cbfbadf3905072798e96652faf02dbe8
Version: 5866efa8cbfbadf3905072798e96652faf02dbe8
Version: 5866efa8cbfbadf3905072798e96652faf02dbe8
Version: 5866efa8cbfbadf3905072798e96652faf02dbe8
Version: 5866efa8cbfbadf3905072798e96652faf02dbe8
Version: 5866efa8cbfbadf3905072798e96652faf02dbe8
Version: 5866efa8cbfbadf3905072798e96652faf02dbe8
Version: 66ed7b413d31c6ff23901ac4443b1cc1af2f6113
Version: 7be8c165dc81564705e8e0b72d398ef708f67eaa
Version: 4.19.99   ≤
Version: 5.4.15   ≤
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\"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\": \"2026-05-23T16:03:14.907Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-71120\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-14T12:44:44.478Z\", \"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"
    }
  }
}


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