CVE-2025-71120
High
Description
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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Linux Kernel
PublishedJan 14, 2026
First seenJan 14, 2026
Weakness typeCWE-476NULL pointer dereference
How to fix
Update
- linux linux_kernel4.20, 5.5, 5.10.248, 5.15.198, 6.1.160, 6.6.120, 6.12.64, 6.18.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 4.19.99 ≤ v < 4.20, 5.4.15 ≤ v < 5.5, 5.5.1 ≤ v < 5.10.248, 5.11 ≤ v < 5.15.198, 5.16 ≤ v < 6.1.160, 6.2 ≤ v < 6.6.120, 6.7 ≤ v < 6.12.64, 6.13 ≤ v < 6.18.3, 5.5, 6.19 | 4.20, 5.5, 5.10.248, 5.15.198, 6.1.160, 6.6.120, 6.12.64, 6.18.3 |
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