CVE-2022-50499

Kernel memory corruption via stale DVB entity pointer

Published Oct 4, 2025 · Updated Oct 4, 2025

Double free in the Linux kernel DVB core allows local users to corrupt kernel memory during media-device registration failures. When dvbdev->pad allocation fails, dvb_create_media_entity() frees dvb->entity without clearing the pointer, and caller cleanup frees it again. Reachability requires low-privileged local access and the DVB media-registration error path; successful exploitation can crash the kernel or compromise kernel-managed data.

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

What happened

Double free in the Linux kernel DVB core allows local users to corrupt kernel memory during media-device registration failures. When dvbdev->pad allocation fails, dvb_create_media_entity() frees dvb->entity without clearing the pointer, and caller cleanup frees it again. Reachability requires low-privileged local access and the DVB media-registration error path; successful exploitation can crash the kernel or compromise kernel-managed data.

The record

CVE
CVE-2022-50499
Published
Oct 4, 2025
Updated
Oct 4, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-415, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 4, 2025Record 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=1399a136127bfe1b9bb7c951d9851da62a519121 <e9a78485b658361fab6a5547377be6c1af6f1b3d
  2. Affected versionversion=202be5d6e46f682b9d1d79cd4dc6ab726e62ef1c
  3. Affected versionversion=4df2427a5148093987437054bb82da4d014dcd59 <70bc51303871159796b55ba1a8f16637b46c2511
  4. Affected versionversion=5.4
  5. Affected versionversion=8c17f6f5d0d6aab72a2af25c9911ac66e984be06
  6. Affected versionversion=9db28659aa893c68f162b11fd63bb7f6a713e52f <0588b12c418c3e4f927ced11f27b02ef4a5bfb07
  7. Affected versionversion=fcd5ce4b3936242e6679875a4d3c3acfc8743e15 <123eddf92a114e03919942641d2c2b1f4ca56ea6
  8. Affected versionversion=fcd5ce4b3936242e6679875a4d3c3acfc8743e15 <6b0d0477fce747d4137aa65856318b55fba72198
  9. Affected versionversion=fcd5ce4b3936242e6679875a4d3c3acfc8743e15 <772892b29ac50c2c5e918fc80104aa6ede81d837
  10. Affected versionversion=fcd5ce4b3936242e6679875a4d3c3acfc8743e15 <7dd5a68cdbbbe7fc67ba701cb52ba10d8ba149f8
  11. Affected versionversion=fcd5ce4b3936242e6679875a4d3c3acfc8743e15 <acf984a3718c2458eb9e08b6714490a04f213c58
  12. Affected versionversion=fcd5ce4b3936242e6679875a4d3c3acfc8743e15 <b21f62b49ee9c3e0216d685d9cfd6003e5727271

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1399a136127bfe1b9bb7c951d9851da62a519121 <e9a78485b658361fab6a5547377be6c1af6f1b3d; version=202be5d6e46f682b9d1d79cd4dc6ab726e62ef1c; version=4df2427a5148093987437054bb82da4d014dcd59 <70bc51303871159796b55ba1a8f16637b46c2511; version=5.4; version=8c17f6f5d0d6aab72a2af25c9911ac66e984be06; version=9db28659aa893c68f162b11fd63bb7f6a713e52f <0588b12c418c3e4f927ced11f27b02ef4a5bfb07; version=fcd5ce4b3936242e6679875a4d3c3acfc8743e15 <123eddf92a114e03919942641d2c2b1f4ca56ea6; version=fcd5ce4b3936242e6679875a4d3c3acfc8743e15 <6b0d0477fce747d4137aa65856318b55fba72198; version=fcd5ce4b3936242e6679875a4d3c3acfc8743e15 <772892b29ac50c2c5e918fc80104aa6ede81d837; version=fcd5ce4b3936242e6679875a4d3c3acfc8743e15 <7dd5a68cdbbbe7fc67ba701cb52ba10d8ba149f8; version=fcd5ce4b3936242e6679875a4d3c3acfc8743e15 <acf984a3718c2458eb9e08b6714490a04f213c58; version=fcd5ce4b3936242e6679875a4d3c3acfc8743e15 <b21f62b49ee9c3e0216d685d9cfd6003e5727271

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8CanonicalCVSS: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-415Double 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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