CVE-2025-71120

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux5866efa8cbfbadf3905072798e96652faf02dbe8 < a8f1e445ce3545c90d69c9e8ff8f7821825fe810affected
LinuxLinux5866efa8cbfbadf3905072798e96652faf02dbe8 < 4dedb6a11243a5c9eb9dbb97bca3c98bd725e83daffected
LinuxLinux5866efa8cbfbadf3905072798e96652faf02dbe8 < f9e53f69ac3bc4ef568b08d3542edac02e83fefdaffected
LinuxLinux5866efa8cbfbadf3905072798e96652faf02dbe8 < 7452d53f293379e2c38cfa8ad0694aa46fc4788baffected
LinuxLinux5866efa8cbfbadf3905072798e96652faf02dbe8 < a2c6f25ab98b423f99ccd94874d655b8bcb01a19affected
LinuxLinux5866efa8cbfbadf3905072798e96652faf02dbe8 < 1c8bb965e9b0559ff0f5690615a527c30f651dd8affected
LinuxLinux5866efa8cbfbadf3905072798e96652faf02dbe8 < d4b69a6186b215d2dc1ebcab965ed88e8d41768daffected
LinuxLinux66ed7b413d31c6ff23901ac4443b1cc1af2f6113affected
LinuxLinux7be8c165dc81564705e8e0b72d398ef708f67eaaaffected
LinuxLinux4.19.99 < 4.20affected
LinuxLinux5.4.15 < 5.5affected
LinuxLinux5.5affected
LinuxLinux0 < 5.5unaffected
LinuxLinux5.10.248 <= 5.10.*unaffected
LinuxLinux5.15.198 <= 5.15.*unaffected
LinuxLinux6.1.160 <= 6.1.*unaffected
LinuxLinux6.6.120 <= 6.6.*unaffected
LinuxLinux6.12.64 <= 6.12.*unaffected
LinuxLinux6.18.3 <= 6.18.*unaffected
LinuxLinux6.19 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References