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Fencer Vulns
high 7.8

CVE-2024-27043 json

media: edia: dvbdev: fix a use-after-free

published 2024-05-01 2 y ago modified 2026-08-05 3 mo ago also EUVD-2024-24305

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 22%
public exploits
0
none known

Summary

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

media: edia: dvbdev: fix a use-after-free

In dvb_register_device, *pdvbdev is set equal to dvbdev, which is freed in several error-handling paths. However, *pdvbdev is not set to NULL after dvbdev's deallocation, causing use-after-frees in many places, for example, in the following call chain:

budget_register |-> dvb_dmxdev_init |-> dvb_register_device |-> dvb_dmxdev_release |-> dvb_unregister_device |-> dvb_remove_device |-> dvb_device_put |-> kref_put

When calling dvb_unregister_device, dmxdev->dvbdev (i.e. *pdvbdev in dvb_register_device) could point to memory that had been freed in dvb_register_device. Thereafter, this pointer is transferred to kref_put and triggering a use-after-free.

Patch / fix

  • Linux Linux 4.19.311, 5.4.273, 5.10.214, 5.15.153, 6.1.83, 6.6.23, 6.7.11, 6.8.2, 6.9
  • linux Debian 12 6.1.85-1
  • linux Debian 14, Debian 13 6.7.12-1

debian advisories DEBIAN-CVE-2024-27043

  • linux Ubuntu 20.04 LTS 5.4.0-189.209
  • linux Ubuntu 22.04 LTS 5.15.0-112.122
  • linux Ubuntu 24.04 LTS 6.8.0-35.35
  • linux-aws Ubuntu 20.04 LTS 5.4.0-1128.138
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1063.69
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1009.9
  • linux-gcp Ubuntu 20.04 LTS 5.4.0-1132.141
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1062.70

ubuntu advisories UBUNTU-CVE-2024-27043

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

  • perf RHEL 8 4.18.0-553.30.1.el8_10
  • kernel RHEL 8 4.18.0-553.30.1.el8_10
  • bpftool RHEL 8 4.18.0-553.30.1.el8_10
  • kernel-core RHEL 8 4.18.0-553.30.1.el8_10
  • kernel-tools RHEL 8 4.18.0-553.30.1.el8_10
  • python3-perf RHEL 8 4.18.0-553.30.1.el8_10
  • kernel-modules RHEL 8 4.18.0-553.30.1.el8_10
  • kernel-zfcpdump RHEL 8 4.18.0-553.30.1.el8_10

red hat advisories RHSA-2024:10281RHSA-2024:10282

  • kernel-source Linux Micro 6.1, Linux Micro 6.0 6.4.0-24.1
  • kernel-default Linux Micro 6.1, Linux Micro 6.0 6.4.0-24.1
  • kernel-kvmsmall Linux Micro 6.1, Linux Micro 6.0 6.4.0-24.1
  • kernel-default-base Linux Micro 6.1, Linux Micro 6.0 6.4.0-24.1.21.4
  • kernel-livepatch-MICRO-6-0_Update_4 Linux Micro 6.1, Linux Micro 6.0 1-1.2
  • kernel-rt Linux Micro 6.1, Linux Micro 6.0 6.4.0-22.1
  • kernel-source-rt Linux Micro 6.1, Linux Micro 6.0 6.4.0-22.1
  • kernel-livepatch-MICRO-6-0-RT_Update_4 Linux Micro 6.1, Linux Micro 6.0 1-1.1

suse advisories SUSE-SU-2025:20164-1SUSE-SU-2025:20247-1SUSE-SU-2025:20163-1SUSE-SU-2025:20246-1SUSE-SU-2025:20028-1SUSE-SU-2025:20008-1

  • perf AlmaLinux 8 4.18.0-553.30.1.el8_10
  • kernel AlmaLinux 8 4.18.0-553.30.1.el8_10
  • bpftool AlmaLinux 8 4.18.0-553.30.1.el8_10
  • kernel-core AlmaLinux 8 4.18.0-553.30.1.el8_10
  • kernel-tools AlmaLinux 8 4.18.0-553.30.1.el8_10
  • python3-perf AlmaLinux 8 4.18.0-553.30.1.el8_10
  • kernel-modules AlmaLinux 8 4.18.0-553.30.1.el8_10
  • kernel-zfcpdump AlmaLinux 8 4.18.0-553.30.1.el8_10

almalinux advisories ALSA-2024:10281ALSA-2024:10282

  • kernel-rt Rocky Linux 8 4.18.0-553.30.1.rt7.371.el8_10
  • kernel Rocky Linux 8 4.18.0-553.30.1.el8_10

rocky linux advisories RLSA-2024:10282RLSA-2024:10281

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-2024-27043 updated cvss 5.2

kernel: media: edia: dvbdev: fix a use-after-free

  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.30.1.el8_10, kernel 4.18.0-553.30.1.el8_10, bpftool 4.18.0-553.30.1.el8_10, kernel-core 4.18.0-553.30.1.el8_10, kernel-tools 4.18.0-553.30.1.el8_10, python3-perf 4.18.0-553.30.1.el8_10, +15 more Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.30.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.30.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.30.1.el8_10
    fixed: vendor fix RHSA-2024:10281
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.30.1.rt7.371.el8_10, kernel-rt-kvm 4.18.0-553.30.1.rt7.371.el8_10, kernel-rt-core 4.18.0-553.30.1.rt7.371.el8_10, kernel-rt-modules 4.18.0-553.30.1.rt7.371.el8_10, kernel-rt-debug-kvm 4.18.0-553.30.1.rt7.371.el8_10, kernel-rt-debug-core 4.18.0-553.30.1.rt7.371.el8_10, +4 more Red Hat Enterprise Linux RT (v. 8) kernel-rt 4.18.0-553.30.1.rt7.371.el8_10, kernel-rt-core 4.18.0-553.30.1.rt7.371.el8_10, kernel-rt-modules 4.18.0-553.30.1.rt7.371.el8_10, kernel-rt-debug-core 4.18.0-553.30.1.rt7.371.el8_10, kernel-rt-debug-modules 4.18.0-553.30.1.rt7.371.el8_10, kernel-rt-modules-extra 4.18.0-553.30.1.rt7.371.el8_10, +2 more
    fixed: vendor fix RHSA-2024:10282
  • Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +83 more
    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

Exploit prediction

0.29% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Linux Linux

Classification

Weakness
Technology feeds

References

Sources

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.