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.

Impact & exploitability

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products we track (1)

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

Official patch: https://git.kernel.org/stable/c/1c8bb965e9b0559ff0f5690615a527c30f651dd8 ↗

Additional information

• NVD record
• https://git.kernel.org/stable/c/1c8bb965e9b0559ff0f5690615a527c30f651dd8Patch
• https://git.kernel.org/stable/c/4dedb6a11243a5c9eb9dbb97bca3c98bd725e83dPatch
• https://git.kernel.org/stable/c/7452d53f293379e2c38cfa8ad0694aa46fc4788bPatch
• https://git.kernel.org/stable/c/a2c6f25ab98b423f99ccd94874d655b8bcb01a19Patch
• https://git.kernel.org/stable/c/a8f1e445ce3545c90d69c9e8ff8f7821825fe810Patch
• https://git.kernel.org/stable/c/d4b69a6186b215d2dc1ebcab965ed88e8d41768dPatch
• https://git.kernel.org/stable/c/f9e53f69ac3bc4ef568b08d3542edac02e83fefdPatch
• https://cert-portal.siemens.com/productcert/html/ssa-019113.html