What’s Vulnerable › Vulnerabilities

CVE-2023-53519: media: v4l2-mem2mem: add lock to protect parameter num_rdy

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-10-01 · updated 2026-06-17
• Weakness: CWE-667

Description

In the Linux kernel, the following vulnerability has been resolved: media: v4l2-mem2mem: add lock to protect parameter num_rdy Getting below error when using KCSAN to check the driver. Adding lock to protect parameter num_rdy when getting the value with function: v4l2_m2m_num_src_bufs_ready/v4l2_m2m_num_dst_bufs_ready. kworker/u16:3: [name:report&]BUG: KCSAN: data-race in v4l2_m2m_buf_queue kworker/u16:3: [name:report&] kworker/u16:3: [name:report&]read-write to 0xffffff8105f35b94 of 1 bytes by task 20865 on cpu 7: kworker/u16:3:  v4l2_m2m_buf_queue+0xd8/0x10c

Affected products

• Linux kernel: from 2.6.39 before 4.14.324; from 4.15 before 4.19.293; from 4.20 before 5.4.255; from 5.5 before 5.10.192; from 5.11 before 5.15.128; from 5.16 before 6.1.47 — fixed in 4.14.324, 4.19.293, 5.10.192, 5.15.128, 5.4.255, 6.1.47

How to fix

Upgrade to a fixed version: Linux kernel 4.14.324, 4.19.293, 5.10.192, 5.15.128. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1676748aa29099fc0abd71e0fb092e76e835f25c
• https://git.kernel.org/stable/c/56b5c3e67b0f9af3f45cf393be048ee8d8a92694
• https://git.kernel.org/stable/c/690dd4780b3f4d755e4e7883e8c3d1b5052f6bf2
• https://git.kernel.org/stable/c/7fc7f87725805197388ba749a1801df33000fa50
• https://git.kernel.org/stable/c/c71aa5f1cf961264690f2560503ea396b6e3c680
• https://git.kernel.org/stable/c/e01ea1c4191ee08440b5f86db98dff695e9cedf9
• https://git.kernel.org/stable/c/e52de26cb37459b16213438a2c82feb155dd3bbd
• https://git.kernel.org/stable/c/ef009fe2010ea2a3a7045ecb72729cf366e0967b

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