CVE-2022-50274
media: dvbdev: adopts refcnt to avoid UAF
- Published
- Updated
- Reserved
- Assigned by
- Linux
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.
Timeline
ID reserved
By Linux
Published
- 11 months later
· 11 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.16% · top 94% of all CVEs (7 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Weakness
Affected products
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < ac521bbe3d00fa574e66a9361763f2b37725bc97
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 219b44bf94203bd433aa91b7796475bf656348e5
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 6d18b44bb44e1f4d97dfe0efe92ac0f0984739c2
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 2abd73433872194bccdf1432a0980e4ec5273c2a
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 88a6f8a72d167294c0931c7874941bf37a41b6dd
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < a2f0a08aa613176c9688c81d7b598a7779974991
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 9945d05d6693710574f354c5dbddc47f5101eb77
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 0fc044b2b5e2d05a1fa1fb0d7f270367a7855d79
- affected 2.6.12
- unaffected < 2.6.12
- unaffected 4.14.303 – ≤ 4.14.*
- unaffected 4.19.270 – ≤ 4.19.*
- unaffected 5.4.229 – ≤ 5.4.*
- unaffected 5.10.163 – ≤ 5.10.*
- unaffected 5.15.86 – ≤ 5.15.*
- unaffected 6.0.16 – ≤ 6.0.*
- unaffected 6.1.2 – ≤ 6.1.*
- unaffected 6.2 – ≤ *
References (8)
- https://git.kernel.org/stable/c/ac521bbe3d00fa574e66a9361763f2b37725bc97 (opens in a new tab)
- https://git.kernel.org/stable/c/219b44bf94203bd433aa91b7796475bf656348e5 (opens in a new tab)
- https://git.kernel.org/stable/c/6d18b44bb44e1f4d97dfe0efe92ac0f0984739c2 (opens in a new tab)
- https://git.kernel.org/stable/c/2abd73433872194bccdf1432a0980e4ec5273c2a (opens in a new tab)
- https://git.kernel.org/stable/c/88a6f8a72d167294c0931c7874941bf37a41b6dd (opens in a new tab)
- https://git.kernel.org/stable/c/a2f0a08aa613176c9688c81d7b598a7779974991 (opens in a new tab)
- https://git.kernel.org/stable/c/9945d05d6693710574f354c5dbddc47f5101eb77 (opens in a new tab)
- https://git.kernel.org/stable/c/0fc044b2b5e2d05a1fa1fb0d7f270367a7855d79 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-50274)Record last updated .