7.8

CVE-2022-50274: media: dvbdev: adopts refcnt to avoid UAF

Modified
AliasesUBUNTU-CVE-2022-50274DEBIAN-CVE-2022-50274
Published 15-09-2025Last modified 05-08-2026

Vulnerability summary

CVE-2022-50274 is a high (CVSS 7.8) Use After Free vulnerability in linux. EPSS estimates a 0.16% chance of exploitation in the next 30 days, higher than 5.5% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.16%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2
RHSA-2023:7398RHSA-2024:3138

Timeline

  1. 15-09-2025
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: media: dvbdev: adopts refcnt to avoid UAF dvb_unregister_device() is known that prone to use-after-free. That is, the cleanup from dvb_unregister_device() releases the dvb_device even if there are pointers stored in file->private_data still refer to it. This patch adds a reference counter into struct dvb_device and delays its deallocation until no pointer refers to the object.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.16%

Chance of exploitation in the next 30 days

Percentile

6%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.16% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu120 products
  • linuxAll versions (No fix recorded) | < 4.15.0-208.220 | < 5.4.0-144.161 | < 5.15.0-69.76
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 4.15.0-1153.166 | < 5.4.0-1097.105 | < 5.15.0-1033.37
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < ac521bbe3d00fa574e66a9361763f2b37725bc97 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 219b44bf94203bd433aa91b7796475bf656348e5 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 6d18b44bb44e1f4d97dfe0efe92ac0f0984739c2 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 2abd73433872194bccdf1432a0980e4ec5273c2a | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 88a6f8a72d167294c0931c7874941bf37a41b6dd | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < a2f0a08aa613176c9688c81d7b598a7779974991 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 9945d05d6693710574f354c5dbddc47f5101eb77 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 0fc044b2b5e2d05a1fa1fb0d7f270367a7855d79 | 2.6.12
  • linux_kernel< 4.14.303 | ≥ 4.15, < 4.19.270 | ≥ 4.20, < 5.4.229 | ≥ 5.5, < 5.10.163 | ≥ 5.11, < 5.15.86 | ≥ 5.16, < 6.0.16 | ≥ 6.1, < 6.1.2
Debian1 product
  • linux< 6.1.4-1

3 vendors · 123 products

References

12 links
Show all 12 references