CVE-2024-27043

Local privilege escalation via stale DVB pointer

Published May 1, 2024 · Updated Aug 5, 2026

Use-after-free in Linux kernel DVB device registration allows local users to gain kernel privileges through device re-probing. In dvb_register_device, error paths free dvbdev without clearing the caller's pdvbdev pointer, which later reaches kref_put during unregister handling. An unprivileged local account must induce memory or DVB-minor exhaustion and re-probe an existing tuner; exploitation enables privilege escalation or a kernel panic.

CVSS severity7.8
High
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Linux kernel DVB device registration allows local users to gain kernel privileges through device re-probing. In dvb_register_device, error paths free dvbdev without clearing the caller's pdvbdev pointer, which later reaches kref_put during unregister handling. An unprivileged local account must induce memory or DVB-minor exhaustion and re-probe an existing tuner; exploitation enables privilege escalation or a kernel panic.

The record

CVE
CVE-2024-27043
Published
May 1, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.6.21
  2. Affected versionversion=b61901024776b25ce7b8edc31bb1757c7382a88e <096237039d00c839f3e3a5fe6d001bf0db45b644
  3. Affected versionversion=b61901024776b25ce7b8edc31bb1757c7382a88e <0d3fe80b6d175c220b3e252efc6c6777e700e98e
  4. Affected versionversion=b61901024776b25ce7b8edc31bb1757c7382a88e <35674111a043b0482a9bc69da8850a83f465b07d
  5. Affected versionversion=b61901024776b25ce7b8edc31bb1757c7382a88e <437a111f79a2f5b2a5f21e27fdec6f40c8768712
  6. Affected versionversion=b61901024776b25ce7b8edc31bb1757c7382a88e <779e8db7efb22316c8581d6c229636d2f5694a62
  7. Affected versionversion=b61901024776b25ce7b8edc31bb1757c7382a88e <8c64f4cdf4e6cc5682c52523713af8c39c94e6d5
  8. Affected versionversion=b61901024776b25ce7b8edc31bb1757c7382a88e <b7586e902128e4fb7bfbb661cb52e4215a65637b
  9. Affected versionversion=b61901024776b25ce7b8edc31bb1757c7382a88e <d0f5c28333822f9baa5280d813124920720fd856
  10. Affected versionversion=b61901024776b25ce7b8edc31bb1757c7382a88e <f20c3270f3ed5aa6919a87e4de9bf6c05fb57086

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.21; version=b61901024776b25ce7b8edc31bb1757c7382a88e <096237039d00c839f3e3a5fe6d001bf0db45b644; version=b61901024776b25ce7b8edc31bb1757c7382a88e <0d3fe80b6d175c220b3e252efc6c6777e700e98e; version=b61901024776b25ce7b8edc31bb1757c7382a88e <35674111a043b0482a9bc69da8850a83f465b07d; version=b61901024776b25ce7b8edc31bb1757c7382a88e <437a111f79a2f5b2a5f21e27fdec6f40c8768712; version=b61901024776b25ce7b8edc31bb1757c7382a88e <779e8db7efb22316c8581d6c229636d2f5694a62; version=b61901024776b25ce7b8edc31bb1757c7382a88e <8c64f4cdf4e6cc5682c52523713af8c39c94e6d5; version=b61901024776b25ce7b8edc31bb1757c7382a88e <b7586e902128e4fb7bfbb661cb52e4215a65637b; version=b61901024776b25ce7b8edc31bb1757c7382a88e <d0f5c28333822f9baa5280d813124920720fd856; version=b61901024776b25ce7b8edc31bb1757c7382a88e <f20c3270f3ed5aa6919a87e4de9bf6c05fb57086

Published CVSS scores

7.8NISTCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8Linux kernel CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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