medium 5.5

CVE-2024-39497 json

drm/shmem-helper: Fix BUG_ON() on mmap(PROT_WRITE, MAP_PRIVATE)

published 2024-07-12 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-38023

cvss: 5.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 20%
public exploits: 0; none known

In the Linux kernel, the following vulnerability has been resolved:

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;

Patch / fix

fixed in 1 distros 4 links 6

Linux Linux 5.10.229, 5.15.169, 6.1.114, 6.6.35, 6.9.6, 6.10

debian ubuntu red hat suse

linux Debian 12 6.1.115-1
linux Debian 14, Debian 13 6.9.7-1

debian advisories DEBIAN-CVE-2024-39497

linux Ubuntu 22.04 LTS 5.15.0-133.144
linux Ubuntu 24.04 LTS 6.8.0-44.44
linux-aws Ubuntu 22.04 LTS 5.15.0-1078.85
linux-aws Ubuntu 24.04 LTS 6.8.0-1015.16
linux-gcp Ubuntu 22.04 LTS 5.15.0-1077.86
linux-gcp Ubuntu 24.04 LTS 6.8.0-1014.16
linux-gke Ubuntu 22.04 LTS 5.15.0-1075.81
linux-gke Ubuntu 24.04 LTS 6.8.0-1010.13

ubuntu advisories UBUNTU-CVE-2024-39497

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

kernel RHEL 9 5.14.0-503.11.1.el9_5
rv RHEL 9 5.14.0-503.11.1.el9_5
perf RHEL 9 5.14.0-503.11.1.el9_5
rtla RHEL 9 5.14.0-503.11.1.el9_5
bpftool RHEL 9 7.4.0-503.11.1.el9_5
libperf RHEL 9 5.14.0-503.11.1.el9_5
kernel-rt RHEL 9 5.14.0-503.11.1.el9_5
kernel-64k RHEL 9 5.14.0-503.11.1.el9_5

red hat advisories RHSA-2024:9315

kernel-rt Linux Micro 6.0 6.4.0-10.1
kernel-source-rt Linux Micro 6.0 6.4.0-10.1
kernel-livepatch-MICRO-6-0-RT_Update_2 Linux Micro 6.0 1-1.1
kernel-source Linux Micro 6.0 6.4.0-19.1
kernel-default Linux Micro 6.0 6.4.0-19.1
kernel-kvmsmall Linux Micro 6.0 6.4.0-19.1
kernel-default-base Linux Micro 6.0 6.4.0-17.1.1.51
kernel-livepatch-MICRO-6-0_Update_2 Linux Micro 6.0 1-1.1

suse advisories SUSE-SU-2025:20047-1 SUSE-SU-2025:20044-1 SUSE-SU-2024:3383-1 SUSE-SU-2024:3195-1 SUSE-SU-2024:3194-1 SUSE-SU-2024:2947-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-39497 updated 2026-11-05 cvss 4.4

kernel: drm/shmem-helper: Fix BUG_ON() on mmap(PROT_WRITE, MAP_PRIVATE)

Red Hat Enterprise Linux 9 kernel-rt, kernel-rt-kvm, kernel-rt-core, kernel-rt-modules, kernel-rt-debug-kvm, kernel-rt-debug-core, +12 more
affected: no fix planned “Will not fix”
Red Hat CodeReady Linux Builder (v. 9) libperf 5.14.0-503.11.1.el9_5, kernel-debuginfo-common-s390x 5.14.0-503.11.1.el9_5, kernel-debuginfo-common-x86_64 5.14.0-503.11.1.el9_5, kernel-debuginfo-common-aarch64 5.14.0-503.11.1.el9_5, kernel-debuginfo-common-ppc64le 5.14.0-503.11.1.el9_5 Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-503.11.1.el9_5, perf 5.14.0-503.11.1.el9_5, rtla 5.14.0-503.11.1.el9_5, kernel-devel-matched 5.14.0-503.11.1.el9_5, kernel-64k-devel-matched 5.14.0-503.11.1.el9_5, kernel-debug-devel-matched 5.14.0-503.11.1.el9_5, +6 more Red Hat Enterprise Linux BaseOS (v. 9) bpftool 7.4.0-503.11.1.el9_5, kernel 5.14.0-503.11.1.el9_5, kernel-64k 5.14.0-503.11.1.el9_5, kernel-core 5.14.0-503.11.1.el9_5, kernel-tools 5.14.0-503.11.1.el9_5, python3-perf 5.14.0-503.11.1.el9_5, +29 more Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-503.11.1.el9_5, kernel-rt-core 5.14.0-503.11.1.el9_5, kernel-rt-modules 5.14.0-503.11.1.el9_5, kernel-rt-debug-core 5.14.0-503.11.1.el9_5, kernel-rt-modules-core 5.14.0-503.11.1.el9_5, kernel-rt-debug-modules 5.14.0-503.11.1.el9_5, +4 more Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-503.11.1.el9_5, kernel-rt-kvm 5.14.0-503.11.1.el9_5, kernel-rt-core 5.14.0-503.11.1.el9_5, kernel-rt-modules 5.14.0-503.11.1.el9_5, kernel-rt-debug-kvm 5.14.0-503.11.1.el9_5, kernel-rt-debug-core 5.14.0-503.11.1.el9_5, +6 more
fixed: vendor fix RHSA-2024:9315
Red Hat CodeReady Linux Builder (v. 9) kernel-cross-headers 5.14.0-503.11.1.el9_5 Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more Red Hat Enterprise Linux AppStream (v. 9) kernel-headers 5.14.0-503.11.1.el9_5
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 2 y ago (2024-09-10)

Exploit prediction

0.27% chance of exploitation in the next 30 days, higher than 20% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	5.5	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

Linux Linux

Classification

Weakness

CWE-617 Reachable Assertion

Technology feeds

Linux kernel rss critical rss

References

Sources

CVE List CVE-2024-39497
NVD CVE-2024-39497

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary