CVE-2024-39497
- Source
- https://cve.org/CVERecord?id=CVE-2024-39497
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-39497.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2024-39497
- Downstream
- Related
- Published
- 2024-07-12T12:20:32.330Z
- Modified
- 2026-05-15T11:54:23.443803357Z
- Summary
- drm/shmem-helper: Fix BUG_ON() on mmap(PROT_WRITE, MAP_PRIVATE)
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
drm/shmem-helper: Fix BUGON() on mmap(PROTWRITE, MAP_PRIVATE)
Lack of check for copy-on-write (COW) mapping in drmgemshmemmmap allows users to call mmap with PROTWRITE and MAPPRIVATE flag causing a kernel panic due to BUGON in vmfinsertpfnprot: BUGON((vma->vmflags & VMPFNMAP) && iscowmapping(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, PROTWRITE, MAPPRIVATE, fd, mmap_offset); ptr[0] = 0;
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/39xxx/CVE-2024-39497.json", "cna_assigner": "Linux" }- References
-
- https://git.kernel.org/stable/c/03c71c42809ef4b17f5d874cdb2d3bf40e847b86
- https://git.kernel.org/stable/c/1b4a8b89bf6787090b56424d269bf84ba00c3263
- https://git.kernel.org/stable/c/2219e5f97244b79c276751a1167615b9714db1b0
- https://git.kernel.org/stable/c/39bc27bd688066a63e56f7f64ad34fae03fbe3b8
- https://git.kernel.org/stable/c/3ae63a8c1685e16958560ec08d30defdc5b9cca0
- https://git.kernel.org/stable/c/a508a102edf8735adc9bb73d37dd13c38d1a1b10
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/39xxx/CVE-2024-39497.json
- https://nvd.nist.gov/vuln/detail/CVE-2024-39497
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git