High · published January 14, 2026
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.
| Product | Versions | Fixed in |
|---|---|---|
| linux/linux_kernel | ≥ 4.19.99, < 4.20 | 4.20 |
| linux/linux_kernel | ≥ 5.4.15, < 5.5 | 5.5 |
| linux/linux_kernel | ≥ 5.5.1, < 5.10.248 | 5.10.248 |
| linux/linux_kernel | ≥ 5.11, < 5.15.198 | 5.15.198 |
| linux/linux_kernel | ≥ 5.16, < 6.1.160 | 6.1.160 |
| linux/linux_kernel | ≥ 6.2, < 6.6.120 | 6.6.120 |
| linux/linux_kernel | ≥ 6.7, < 6.12.64 | 6.12.64 |
| linux/linux_kernel | ≥ 6.13, < 6.18.3 | 6.18.3 |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |