CVE-2024-39497
N/A
Summary
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;
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 2194a63a818db71065ebe09c8104f5f021ca4e7b < a508a102edf8735adc9bb73d37dd13c38d1a1b10 | affected |
| Linux | Linux | 2194a63a818db71065ebe09c8104f5f021ca4e7b < 3ae63a8c1685e16958560ec08d30defdc5b9cca0 | affected |
| Linux | Linux | 2194a63a818db71065ebe09c8104f5f021ca4e7b < 2219e5f97244b79c276751a1167615b9714db1b0 | affected |
| Linux | Linux | 2194a63a818db71065ebe09c8104f5f021ca4e7b < 1b4a8b89bf6787090b56424d269bf84ba00c3263 | affected |
| Linux | Linux | 2194a63a818db71065ebe09c8104f5f021ca4e7b < 03c71c42809ef4b17f5d874cdb2d3bf40e847b86 | affected |
| Linux | Linux | 2194a63a818db71065ebe09c8104f5f021ca4e7b < 39bc27bd688066a63e56f7f64ad34fae03fbe3b8 | affected |
| Linux | Linux | 5.2 | affected |
| Linux | Linux | 0 < 5.2 | unaffected |
| Linux | Linux | 5.10.229 <= 5.10.* | unaffected |
| Linux | Linux | 5.15.169 <= 5.15.* | unaffected |
| Linux | Linux | 6.1.114 <= 6.1.* | unaffected |
| Linux | Linux | 6.6.35 <= 6.6.* | unaffected |
| Linux | Linux | 6.9.6 <= 6.9.* | unaffected |
| Linux | Linux | 6.10 <= * | unaffected |
Weaknesses
ADP Enrichment
CVE Program Container
Additional References
- https://git.kernel.org/stable/c/1b4a8b89bf6787090b56424d269bf84ba00c3263
- https://git.kernel.org/stable/c/03c71c42809ef4b17f5d874cdb2d3bf40e847b86
- https://git.kernel.org/stable/c/39bc27bd688066a63e56f7f64ad34fae03fbe3b8
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: partial
References
- https://git.kernel.org/stable/c/a508a102edf8735adc9bb73d37dd13c38d1a1b10
- https://git.kernel.org/stable/c/3ae63a8c1685e16958560ec08d30defdc5b9cca0
- https://git.kernel.org/stable/c/2219e5f97244b79c276751a1167615b9714db1b0
- https://git.kernel.org/stable/c/1b4a8b89bf6787090b56424d269bf84ba00c3263
- https://git.kernel.org/stable/c/03c71c42809ef4b17f5d874cdb2d3bf40e847b86
- https://git.kernel.org/stable/c/39bc27bd688066a63e56f7f64ad34fae03fbe3b8
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