CVE-2025-38533

net: libwx: fix the using of Rx buffer DMA

HIGH

7.8

CVSS Score

Published: August 16, 2025 at 11:12 AM UTC

Updated: August 5, 2026 at 12:44 PM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

HIGH7.8

Exploit prediction

EPSS 0.3%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

6.13 ≤ v < 6.15.86.3 ≤ v < 6.12.406.3 ≤ v < 6.15.86.3 ≤ v < 6.166.3 ≤ v < 6.6.1006.7 ≤ v < 6.12.403c47e8ae113a68da47987750d9896e325d0aeedd6.16 rc1 6.16 rc2 6.16 rc3 6.16 rc4 6.16 rc5 6.16 rc6

Vendor states this is fixed in 027701180a7bcb64c42eab291133ef0c87b5b6c5 (fixed)

Vendor states this is fixed in 05c37b574997892a40a0e9b9b88a481566b2367d (fixed)

Vendor states this is fixed in 5fd77cc6bd9b368431a815a780e407b7781bcca0 (fixed)

Vendor states this is fixed in ba7c793f96c1c2b944bb6f423d7243f3afc30fe9 (fixed)

Vendor states this is fixed in 6.12.40 (unaffected)

Vendor states this is fixed in 6.15.8 (unaffected)

Vendor states this is fixed in 6.16 (unaffected)

Vendor states this is fixed in 6.3 (unaffected)

Vendor states this is fixed in 6.6.100 (unaffected)