CVE-2024-39497

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

12/07/2024

Last modified:

03/11/2025

Description

In the Linux kernel, the following vulnerability has been resolved: drm/shmem-helper: Fix BUG_ON() on mmap(PROT_WRITE, MAP_PRIVATE) Lack of check for copy-on-write (COW) mapping in drm_gem_shmem_mmap allows users to call mmap with PROT_WRITE and MAP_PRIVATE flag causing a kernel panic due to BUG_ON in vmf_insert_pfn_prot: BUG_ON((vma->vm_flags & VM_PFNMAP) && is_cow_mapping(vma->vm_flags)); Return -EINVAL early if COW mapping is detected. This bug affects all drm drivers using default shmem helpers. It can be reproduced by this simple example: void *ptr = mmap(0, size, PROT_WRITE, MAP_PRIVATE, fd, mmap_offset); ptr[0] = 0;

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

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::::::::	5.2 (including)	5.10.229 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.11 (including)	5.15.169 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.16 (including)	6.1.114 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.2 (including)	6.6.35 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.7 (including)	6.9.6 (excluding)
cpe:2.3:o:linux:linux_kernel:6.10:rc1::::::

To consult the complete list of CPE names with products and versions, see this page

CVE-2024-39497

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools