---
cve: "CVE-2024-27043"
severity: "HIGH"
cvss: 7.8
epss: "29%"
vendor: "Linux"
kev: false
exploited: false
published: "2024-05-01 13:15:49"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-12T08:52:38+02:00"
---

# CVE-2024-27043

> 7.8 HIGH

## Beschreibung

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.

## CVSS-Vektor

```
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- Kernel ≥ 4.19.311
- Kernel ≥ 5.4.273
- Kernel ≥ 5.10.214
- Kernel ≥ 5.15.153
- Kernel ≥ 6.1.83
- Kernel ≥ 6.6.23
- Kernel ≥ 6.7.11
- Kernel ≥ 6.8.2

## Referenzen

- <https://git.kernel.org/stable/c/d0f5c28333822f9baa5280d813124920720fd856>
- <https://git.kernel.org/stable/c/f20c3270f3ed5aa6919a87e4de9bf6c05fb57086>
- <https://git.kernel.org/stable/c/096237039d00c839f3e3a5fe6d001bf0db45b644>
- <https://git.kernel.org/stable/c/0d3fe80b6d175c220b3e252efc6c6777e700e98e>
- <https://git.kernel.org/stable/c/437a111f79a2f5b2a5f21e27fdec6f40c8768712>
- <https://git.kernel.org/stable/c/779e8db7efb22316c8581d6c229636d2f5694a62>
- <https://git.kernel.org/stable/c/35674111a043b0482a9bc69da8850a83f465b07d>
- <https://git.kernel.org/stable/c/b7586e902128e4fb7bfbb661cb52e4215a65637b>
- <https://git.kernel.org/stable/c/8c64f4cdf4e6cc5682c52523713af8c39c94e6d5>
- <https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html>
- <https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2024-27043) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_