CVE-2024-26786
Severity CVSS v4.0:
Pending analysis
Type:
CWE-476
NULL Pointer Dereference
Publication date:
04/04/2024
Last modified:
04/04/2025
Description
In the Linux kernel, the following vulnerability has been resolved:<br />
<br />
iommufd: Fix iopt_access_list_id overwrite bug<br />
<br />
Syzkaller reported the following WARN_ON:<br />
WARNING: CPU: 1 PID: 4738 at drivers/iommu/iommufd/io_pagetable.c:1360<br />
<br />
Call Trace:<br />
iommufd_access_change_ioas+0x2fe/0x4e0<br />
iommufd_access_destroy_object+0x50/0xb0<br />
iommufd_object_remove+0x2a3/0x490<br />
iommufd_object_destroy_user<br />
iommufd_access_destroy+0x71/0xb0<br />
iommufd_test_staccess_release+0x89/0xd0<br />
__fput+0x272/0xb50<br />
__fput_sync+0x4b/0x60<br />
__do_sys_close<br />
__se_sys_close<br />
__x64_sys_close+0x8b/0x110<br />
do_syscall_x64<br />
<br />
The mismatch between the access pointer in the list and the passed-in<br />
pointer is resulting from an overwrite of access->iopt_access_list_id, in<br />
iopt_add_access(). Called from iommufd_access_change_ioas() when<br />
xa_alloc() succeeds but iopt_calculate_iova_alignment() fails.<br />
<br />
Add a new_id in iopt_add_access() and only update iopt_access_list_id when<br />
returning successfully.
Impact
Base Score 3.x
5.50
Severity 3.x
MEDIUM
Vulnerable products and versions
CPE | From | Up to |
---|---|---|
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 6.6 (including) | 6.6.21 (excluding) |
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 6.7 (including) | 6.7.9 (excluding) |
cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:* | ||
cpe:2.3:o:linux:linux_kernel:6.8:rc2:*:*:*:*:*:* | ||
cpe:2.3:o:linux:linux_kernel:6.8:rc3:*:*:*:*:*:* | ||
cpe:2.3:o:linux:linux_kernel:6.8:rc4:*:*:*:*:*:* | ||
cpe:2.3:o:linux:linux_kernel:6.8:rc5:*:*:*:*:*:* | ||
cpe:2.3:o:linux:linux_kernel:6.8:rc6:*:*:*:*:*:* |
To consult the complete list of CPE names with products and versions, see this page
References to Advisories, Solutions, and Tools
- https://git.kernel.org/stable/c/9526a46cc0c378d381560279bea9aa34c84298a0
- https://git.kernel.org/stable/c/aeb004c0cd6958e910123a1607634401009c9539
- https://git.kernel.org/stable/c/f1fb745ee0a6fe43f1d84ec369c7e6af2310fda9
- https://git.kernel.org/stable/c/9526a46cc0c378d381560279bea9aa34c84298a0
- https://git.kernel.org/stable/c/aeb004c0cd6958e910123a1607634401009c9539
- https://git.kernel.org/stable/c/f1fb745ee0a6fe43f1d84ec369c7e6af2310fda9