CVE-2022-50359
media: cx88: Fix a null-ptr-deref bug in buffer_prepare()
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
In the Linux kernel, the following vulnerability has been resolved: media: cx88: Fix a null-ptr-deref bug in buffer_prepare() When the driver calls cx88_risc_buffer() to prepare the buffer, the function call may fail, resulting in a empty buffer and null-ptr-deref later in buffer_queue(). The following log can reveal it: [ 41.822762] general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN PTI [ 41.824488] KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] [ 41.828027] RIP: 0010:buffer_queue+0xc2/0x500 [ 41.836311] Call Trace: [ 41.836945] __enqueue_in_driver+0x141/0x360 [ 41.837262] vb2_start_streaming+0x62/0x4a0 [ 41.838216] vb2_core_streamon+0x1da/0x2c0 [ 41.838516] __vb2_init_fileio+0x981/0xbc0 [ 41.839141] __vb2_perform_fileio+0xbf9/0x1120 [ 41.840072] vb2_fop_read+0x20e/0x400 [ 41.840346] v4l2_read+0x215/0x290 [ 41.840603] vfs_read+0x162/0x4c0 Fix this by checking the return value of cx88_risc_buffer() [hverkuil: fix coding style issues]
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)
- 0.21% · top 88% of all CVEs (6 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 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < c76d04d2079a4b7369ce9a0e859c0f3f2250bcc1
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 10c99d1c46ea9cd940029e17bab11d021f315c21
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 4befc7ffa18ef9a4b70d854465313a345a06862f
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 9181af2dbf06e7f432e5dbe88d10b22343e851b9
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < c2257c8a501537afab276c306cb717b7260276e1
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 6f21976095c1e92454ab030976f95f40d652351b
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 704838040f3bdb4aa07ff4f26505a666a3defcfe
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 644d5a87ab1863eb606526ea743021752a17e9cb
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 2b064d91440b33fba5b452f2d1b31f13ae911d71
- affected 2.6.12
- unaffected < 2.6.12
- unaffected 4.9.331 – ≤ 4.9.*
- unaffected 4.14.296 – ≤ 4.14.*
- unaffected 4.19.262 – ≤ 4.19.*
- unaffected 5.4.220 – ≤ 5.4.*
- unaffected 5.10.150 – ≤ 5.10.*
- unaffected 5.15.75 – ≤ 5.15.*
- unaffected 5.19.17 – ≤ 5.19.*
- unaffected 6.0.3 – ≤ 6.0.*
- unaffected 6.1 – ≤ *
References (9)
- https://git.kernel.org/stable/c/c76d04d2079a4b7369ce9a0e859c0f3f2250bcc1 (opens in a new tab)
- https://git.kernel.org/stable/c/10c99d1c46ea9cd940029e17bab11d021f315c21 (opens in a new tab)
- https://git.kernel.org/stable/c/4befc7ffa18ef9a4b70d854465313a345a06862f (opens in a new tab)
- https://git.kernel.org/stable/c/9181af2dbf06e7f432e5dbe88d10b22343e851b9 (opens in a new tab)
- https://git.kernel.org/stable/c/c2257c8a501537afab276c306cb717b7260276e1 (opens in a new tab)
- https://git.kernel.org/stable/c/6f21976095c1e92454ab030976f95f40d652351b (opens in a new tab)
- https://git.kernel.org/stable/c/704838040f3bdb4aa07ff4f26505a666a3defcfe (opens in a new tab)
- https://git.kernel.org/stable/c/644d5a87ab1863eb606526ea743021752a17e9cb (opens in a new tab)
- https://git.kernel.org/stable/c/2b064d91440b33fba5b452f2d1b31f13ae911d71 (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)
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[](https://trackcve.app/cve/CVE-2022-50359)Record last updated .