In the Linux kernel, the following vulnerability has been resolved:
xen/privcmd: fix error exit of privcmd_ioctl_dm_op()
The error exit of privcmd_ioctl_dm_op() is calling unlock_pages()
potentially with pages being NULL, leading to a NULL dereference.
Additionally lock_pages() doesn't check for pin_user_pages_fast()
having been completely successful, resulting in potentially not
locking all pages into memory. This could result in sporadic failures
when using the related memory in user mode.
Fix all of that by calling unlock_pages() always with the real number
of pinned pages, which will be zero in case pages being NULL, and by
checking the number of pages pinned by pin_user_pages_fast() matching
the expected number of pages.
References
Configurations
Configuration 1 (hide)
|
History
14 Nov 2025, 18:12
| Type | Values Removed | Values Added |
|---|---|---|
| CWE | CWE-476 | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| First Time |
Linux linux Kernel
Linux |
|
| CPE | cpe:2.3:o:linux:linux_kernel:6.0:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.0:rc2:*:*:*:*:*:* |
|
| References | () https://git.kernel.org/stable/c/45d47bd9b96e7874b98dbcc7602fe2826c5d62a6 - Patch | |
| References | () https://git.kernel.org/stable/c/6de50db104af0dc921f593fd95c55db86a52ceef - Patch | |
| References | () https://git.kernel.org/stable/c/c2b7bae7c90051fd6a679d5dee00400d67ebbf4a - Patch | |
| References | () https://git.kernel.org/stable/c/c5deb27895e017a0267de0a20d140ad5fcc55a54 - Patch |
Information
Published : 2025-06-18 11:15
Updated : 2025-11-14 18:12
NVD link : CVE-2022-49989
Mitre link : CVE-2022-49989
CVE.ORG link : CVE-2022-49989
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-476
NULL Pointer Dereference