CVE-2025-38533
CVE-2025-38533 is a high-severity vulnerability in Linux Linux Kernel with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.
Key facts
- Severity: High (CVSS 3.x base score 7.8)
- EPSS exploit prediction: 0% (4th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-27888
- Weakness: CWE-787
- Affected product: Linux Linux Kernel
- Published:
- Last modified:
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.
Frequently asked questions
- What is 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.
- How severe is CVE-2025-38533?
- CVE-2025-38533 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2025-38533 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2025-38533?
- CVE-2025-38533 primarily affects Linux Linux Kernel. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2025-38533?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2025-38533 have an EU (EUVD) identifier?
- Yes. CVE-2025-38533 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-27888.
- When was CVE-2025-38533 published?
- CVE-2025-38533 was published on 2025-08-16 and last updated on 2026-06-17.
References
- https://git.kernel.org/stable/c/027701180a7bcb64c42eab291133ef0c87b5b6c5
- https://git.kernel.org/stable/c/05c37b574997892a40a0e9b9b88a481566b2367d
- https://git.kernel.org/stable/c/5fd77cc6bd9b368431a815a780e407b7781bcca0
- https://git.kernel.org/stable/c/ba7c793f96c1c2b944bb6f423d7243f3afc30fe9
Affected products (7)
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.16:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.16:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.16:rc3:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.16:rc4:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.16:rc5:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.16:rc6:*:*:*:*:*:*
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