Buffer overflow in Linux
CVE-2025-38533
In the Linux kernel, the following vulnerability has been resolved: net: libwx: fix the using of Rx buffer DMA The wx_rx_buffer structure contained two DMA address fields: 'dma' and 'page_dma'. However, only 'page_dma' was actually initialized and used to program the Rx descriptor. But 'dma' was uninitialized and used in some paths. This could lead to undefined behavior, including DMA errors or use-after-free, if the uninitialized 'dma' was used. Althrough such error has not yet occurred, it is worth fixing in the code.
Vulnerability class: Buffer Overflow
EPSS: 0.001 (4.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Linux — versions 3c47e8ae113a68da47987750d9896e325d0aeedd, 6.3, 0
- Linux Linux_kernel — versions 6.16
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2025-38533?
- CVE-2025-38533 is a critical-severity vulnerability in Linux, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2025-08-16.
- How severe is CVE-2025-38533?
- Critical severity. CVSS v3 base score is 9.8 out of 10.