CVE-2024-39497
drm/shmem-helper: Fix BUG_ON() on mmap(PROT_WRITE, MAP_PRIVATE)
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;
INFO
Published Date :
July 12, 2024, 1:15 p.m.
Last Modified :
Nov. 3, 2025, 10:17 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update the affected kernel packages.
- Reboot the system after patching.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2024-39497.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2024-39497 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2024-39497
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2024-39497 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2024-39497 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 03, 2025
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 03, 2025
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html -
Initial Analysis by [email protected]
Sep. 17, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-617 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:6.10:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.9.6 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.35 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.114 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.169 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.2 up to (excluding) 5.10.229 Added Reference Type CVE: https://git.kernel.org/stable/c/03c71c42809ef4b17f5d874cdb2d3bf40e847b86 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/03c71c42809ef4b17f5d874cdb2d3bf40e847b86 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/1b4a8b89bf6787090b56424d269bf84ba00c3263 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/1b4a8b89bf6787090b56424d269bf84ba00c3263 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/2219e5f97244b79c276751a1167615b9714db1b0 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/39bc27bd688066a63e56f7f64ad34fae03fbe3b8 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/39bc27bd688066a63e56f7f64ad34fae03fbe3b8 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/3ae63a8c1685e16958560ec08d30defdc5b9cca0 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/a508a102edf8735adc9bb73d37dd13c38d1a1b10 Types: Patch -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/03c71c42809ef4b17f5d874cdb2d3bf40e847b86 Added Reference https://git.kernel.org/stable/c/1b4a8b89bf6787090b56424d269bf84ba00c3263 Added Reference https://git.kernel.org/stable/c/39bc27bd688066a63e56f7f64ad34fae03fbe3b8 -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Nov. 08, 2024
Action Type Old Value New Value Added Reference kernel.org https://git.kernel.org/stable/c/a508a102edf8735adc9bb73d37dd13c38d1a1b10 [No types assigned] -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Oct. 22, 2024
Action Type Old Value New Value Added Reference kernel.org https://git.kernel.org/stable/c/3ae63a8c1685e16958560ec08d30defdc5b9cca0 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/2219e5f97244b79c276751a1167615b9714db1b0 [No types assigned] -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 12, 2024
Action Type Old Value New Value Added 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; Added Reference kernel.org https://git.kernel.org/stable/c/1b4a8b89bf6787090b56424d269bf84ba00c3263 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/03c71c42809ef4b17f5d874cdb2d3bf40e847b86 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/39bc27bd688066a63e56f7f64ad34fae03fbe3b8 [No types assigned]