CVE-2023-53244 (GCVE-0-2023-53244)

Vulnerability from cvelistv5 – Published: 2025-09-15 14:46 – Updated: 2025-09-15 14:46
VLAI?
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < dcf632bca424e6ff8c8eb89c96694e7f05cd29b6 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 3c67f49a6643d973e83968ea35806c7b5ae68b56 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 3715c5e9a8f96b6ed0dcbea06da443efccac1ecc (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 1634b7adcc5bef645b3666fdd564e5952a9e24e0 (git)
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    Linux Linux Unaffected: 5.15.113 , ≤ 5.15.* (semver)
Unaffected: 6.1.30 , ≤ 6.1.* (semver)
Unaffected: 6.3.4 , ≤ 6.3.* (semver)
Unaffected: 6.4 , ≤ * (original_commit_for_fix)
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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