CVE-2024-56769: Linux kernel · media: dvb-frontends: dib3000mb: fix uninit-value in dib3000_write_reg
Source GCVE Database
Not known to be exploited · CVSS 5.5 Medium.
Data as of 30 Oct 2026, 00:56 UTC
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 6 Jan 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.
What to do
AI-suggested
A fix is available that zeroes out the local buffer to prevent use of uninitialized values. Users should apply the updated Linux kernel patches that address this issue once available. Since this is a kernel-level vulnerability, updating to a patched kernel version is the recommended mitigation.
Description
CVE-2024-56769 is a medium-severity vulnerability in the Linux kernel's media subsystem, specifically in the dvb-frontends driver for dib3000mb. The issue involves an uninitialized value in the dib3000_write_reg function, where a local buffer used for I2C read operations may contain undefined data if the read fails. This can lead to a kernel memory safety issue detected by KMSAN. The problem is mitigated by zeroing out the buffer to avoid use of uninitialized values.
References
- nvd.nist.gov/vuln/detail/CVE-2024-56769 (opens in a new tab)
- git.kernel.org/stable/c/035772fcd631eee2756b31cb6df249c0a8d453d7 (opens in a new tab)
- git.kernel.org/stable/c/1d6de21f00293d819b5ca6dbe75ff1f3b6392140 (opens in a new tab)
- git.kernel.org/stable/c/2dd59fe0e19e1ab955259978082b62e5751924c7 (opens in a new tab)
- git.kernel.org/stable/c/3876e3a1c31a58a352c6bf5d2a90e3304445a637 (opens in a new tab)
- git.kernel.org/stable/c/53106510736e734ce8b731ba871363389bfbf4c9 (opens in a new tab)
- git.kernel.org/stable/c/c1197c1457bb7098cf46366e898eb52b41b6876a (opens in a new tab)
- git.kernel.org/stable/c/e11778189513cd7fb2edced5bd053bc18ede8418 (opens in a new tab)
- lists.debian.org/debian-lts-announce/2025/03/msg00001.html (opens in a new tab)
- lists.debian.org/debian-lts-announce/2025/03/msg00002.html (opens in a new tab)