What’s Vulnerable › Vulnerabilities

CVE-2026-97412: pds_core: quiesce DMA before freeing resources

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-24 · updated 2026-10-21

Description

In the Linux kernel, the following vulnerability has been resolved: pds_core: quiesce DMA before freeing resources pdsc_teardown() frees DMA buffers but does not disable bus mastering, leaving the device able to perform DMA after the buffers are freed. This can lead to use-after-free if the device writes to freed memory. Add pci_clear_master() to pdsc_teardown() to disable bus mastering before freeing resources, ensuring all DMA is quiesced. Add pci_set_master() to pdsc_setup() to re-enable bus mastering, which is needed for the firmware recovery path since pdsc_teardown() now disables it.

Affected products

• Linux kernel: 6.4 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/6443f4f20bdae726fe01cf5946fba9742a0ffda6
• https://git.kernel.org/stable/c/84fc3f30b87e06a11d1807cd385603522610ed40
• https://git.kernel.org/stable/c/9eee6b90bee3df496ed9094d9e76d5e478d72d0a
• https://git.kernel.org/stable/c/cc8beb70e70fc90e54efdbc1128cf7de799e6be4

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