CVE-2023-53244
media: pci: tw68: Fix null-ptr-deref bug in buf prepare and finish
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
In the Linux kernel, the following vulnerability has been resolved: media: pci: tw68: Fix null-ptr-deref bug in buf prepare and finish When the driver calls tw68_risc_buffer() to prepare the buffer, the function call dma_alloc_coherent may fail, resulting in a empty buffer buf->cpu. Later when we free the buffer or access the buffer, null ptr deref is triggered. This bug is similar to the following one: https://git.linuxtv.org/media_stage.git/commit/?id=2b064d91440b33fba5b452f2d1b31f13ae911d71. We believe the bug can be also dynamically triggered from user side. Similarly, we fix this by checking the return value of tw68_risc_buffer() and the value of buf->cpu before buffer free.
Timeline
ID reserved
By Linux
Published
- 8 months later
· 8 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 |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.15% · top 96% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
Affected products
- affected e15d1c12c5878b3a80d6573af1721e17264e0286 – < dcf632bca424e6ff8c8eb89c96694e7f05cd29b6
- affected e15d1c12c5878b3a80d6573af1721e17264e0286 – < 3c67f49a6643d973e83968ea35806c7b5ae68b56
- affected e15d1c12c5878b3a80d6573af1721e17264e0286 – < 3715c5e9a8f96b6ed0dcbea06da443efccac1ecc
- affected e15d1c12c5878b3a80d6573af1721e17264e0286 – < 1634b7adcc5bef645b3666fdd564e5952a9e24e0
- affected 3.18
- unaffected < 3.18
- unaffected 5.15.113 – ≤ 5.15.*
- unaffected 6.1.30 – ≤ 6.1.*
- unaffected 6.3.4 – ≤ 6.3.*
- unaffected 6.4 – ≤ *
References (4)
- https://git.kernel.org/stable/c/dcf632bca424e6ff8c8eb89c96694e7f05cd29b6 (opens in a new tab)
- https://git.kernel.org/stable/c/3c67f49a6643d973e83968ea35806c7b5ae68b56 (opens in a new tab)
- https://git.kernel.org/stable/c/3715c5e9a8f96b6ed0dcbea06da443efccac1ecc (opens in a new tab)
- https://git.kernel.org/stable/c/1634b7adcc5bef645b3666fdd564e5952a9e24e0 (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-2023-53244)Record last updated .