GHSA-7RCG-54W2-5P8P
Vulnerability from github – Published: 2025-09-15 15:31 – Updated: 2025-12-03 21:31In 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.
{
"affected": [],
"aliases": [
"CVE-2023-53244"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-09-15T15:15:51Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: pci: tw68: Fix null-ptr-deref bug in buf prepare and finish\n\nWhen the driver calls tw68_risc_buffer() to prepare the buffer, the\nfunction call dma_alloc_coherent may fail, resulting in a empty buffer\nbuf-\u003ecpu. Later when we free the buffer or access the buffer, null ptr\nderef is triggered.\n\nThis bug is similar to the following one:\nhttps://git.linuxtv.org/media_stage.git/commit/?id=2b064d91440b33fba5b452f2d1b31f13ae911d71.\n\nWe believe the bug can be also dynamically triggered from user side.\nSimilarly, we fix this by checking the return value of tw68_risc_buffer()\nand the value of buf-\u003ecpu before buffer free.",
"id": "GHSA-7rcg-54w2-5p8p",
"modified": "2025-12-03T21:31:00Z",
"published": "2025-09-15T15:31:30Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53244"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1634b7adcc5bef645b3666fdd564e5952a9e24e0"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3715c5e9a8f96b6ed0dcbea06da443efccac1ecc"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3c67f49a6643d973e83968ea35806c7b5ae68b56"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/dcf632bca424e6ff8c8eb89c96694e7f05cd29b6"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
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