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.
En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta: SUNRPC: svcauth_gss: evitar desreferenciación de NULL en gss_token de longitud cero en gss_read_proxy_verf Un gss_token de longitud cero resulta en pages == 0 y in_token->pages[0] es NULL. El código evalúa incondicionalmente page_address(in_token->pages[0]) para el memcpy inicial, lo que puede desreferenciar NULL incluso cuando la longitud de la copia es 0. Proteger el primer memcpy para que solo se ejecute cuando length > 0.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
| Attack Vector | LOCAL |
|---|---|
| Attack Complexity | LOW |
| Privileges Required | LOW |
| User Interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality Impact | NONE |
| Integrity Impact | NONE |
| Availability Impact | HIGH |
| Source | Type | Description |
|---|---|---|
| [email protected] | Primary |
en
CWE-476
|
| Vendor | Product | Version | Update | Type |
|---|---|---|---|---|
| linux | linux_kernel | * | <built-in method update of dict object at 0x7d242450a000> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7d23afb1b080> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7d23afb1b400> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7d239fbe9280> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7d2424508ec0> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7d242450b080> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7d242450bb00> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7d23afb1be80> | Operating System |
| linux | linux_kernel | 5.5 | <built-in method update of dict object at 0x7d23afb196c0> | Operating System |
| linux | linux_kernel | 6.19 | <built-in method update of dict object at 0x7d242450bf80> | Operating System |
| linux | linux_kernel | 6.19 | <built-in method update of dict object at 0x7d23afb1b680> | Operating System |
| linux | linux_kernel | 6.19 | <built-in method update of dict object at 0x7d2424508880> | Operating System |
| linux | linux_kernel | 6.19 | <built-in method update of dict object at 0x7d23a59c8b40> | Operating System |
| linux | linux_kernel | 6.19 | <built-in method update of dict object at 0x7d23a59c85c0> | Operating System |
| linux | linux_kernel | 6.19 | <built-in method update of dict object at 0x7d239fbe8200> | Operating System |
| linux | linux_kernel | 6.19 | <built-in method update of dict object at 0x7d2424509780> | Operating System |
| linux | linux_kernel | 6.19 | <built-in method update of dict object at 0x7d2424508080> | Operating System |
| Vulnerable | CPE |
|---|---|
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:5.5:-:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:6.19:rc7:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:6.19:rc8:*:*:*:*:*:* |