CVE-2024-39497: drm/shmem-helper: Fix BUG_ON() on mmap(PROT_WRITE, MAP_PRIVATE)
First published: Fri Jul 12 2024(Updated: )
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;
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <6.6.35 | 6.6.35 |
| redhat/kernel | <6.9.6 | 6.9.6 |
| redhat/kernel | <6.10 | 6.10 |
| debian/linux | <=5.10.223-1 | 5.10.234-1 6.1.129-1 6.1.135-1 6.12.22-1 6.12.25-1 |
| debian/linux-6.1 | 6.1.129-1~deb11u1 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-39497
- https://nvd.nist.gov/vuln/detail/CVE-2024-39497
- https://launchpad.net/bugs/cve/CVE-2024-39497
- https://security-tracker.debian.org/tracker/CVE-2024-39497
- https://ubuntu.com/security/CVE-2024-39497
- 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://git.kernel.org/linus/39bc27bd688066a63e56f7f64ad34fae03fbe3b8
- https://access.redhat.com/errata/RHSA-2024:9315
- https://bugzilla.redhat.com/show_bug.cgi?id=2297469
Frequently Asked Questions
What is the severity of CVE-2024-39497?
CVE-2024-39497 has been classified with a severity level that indicates potentially high impact on system integrity due to improper handling of memory mappings.
How do I fix CVE-2024-39497?
To mitigate CVE-2024-39497, upgrade to the kernel version 6.6.35, 6.9.6, or 6.10 for Red Hat systems, or apply the appropriate updates if you're using Debian systems.
What systems are affected by CVE-2024-39497?
CVE-2024-39497 affects certain versions of the Linux kernel used in both Red Hat and Debian distributions.
What are the potential consequences of CVE-2024-39497?
Exploitation of CVE-2024-39497 could lead to unauthorized modification of memory, potentially compromising system stability and security.
Is there a workaround for CVE-2024-39497?
Currently, there are no known workarounds for CVE-2024-39497, and it is recommended to apply the latest kernel updates to address the vulnerability.
- agent/title
- agent/type
- agent/author
- agent/remedy
- agent/first-publish-date
- collector/nvd-api
- source/NVD
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2024-39497
- agent/software-canonical-lookup
- agent/references
- agent/severity
- collector/usn-cve
- source/Ubuntu
- collector/nvd-cve
- agent/description
- agent/event
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/trending
- agent/source
- agent/tags
- agent/softwarecombine
- collector/security-tracker-debian
- source/Debian
- package-manager/redhat
- package-manager/debian