CVE-2025-71120

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.

• https://git.kernel.org/stable/c/1c8bb965e9b0559ff0f5690615a527c30f651dd8

  416baaa9-dc9f-4396-8d5f-8c081fb06d67
• https://git.kernel.org/stable/c/7452d53f293379e2c38cfa8ad0694aa46fc4788b

  416baaa9-dc9f-4396-8d5f-8c081fb06d67
• https://git.kernel.org/stable/c/a2c6f25ab98b423f99ccd94874d655b8bcb01a19

  416baaa9-dc9f-4396-8d5f-8c081fb06d67
• https://git.kernel.org/stable/c/d4b69a6186b215d2dc1ebcab965ed88e8d41768d

  416baaa9-dc9f-4396-8d5f-8c081fb06d67
• https://git.kernel.org/stable/c/f9e53f69ac3bc4ef568b08d3542edac02e83fefd

  416baaa9-dc9f-4396-8d5f-8c081fb06d67