pds_core: quiesce DMA before freeing resources

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Summary

CVECVE-2026-97412
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-24 17:17:18 UTC
Updated2026-09-24 17:17:18 UTC
DescriptionIn 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 cc8beb70e70fc90e54efdbc1128cf7de799e6be4 git Not specified
CNA Linux Linux affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 9eee6b90bee3df496ed9094d9e76d5e478d72d0a git Not specified
CNA Linux Linux affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 6443f4f20bdae726fe01cf5946fba9742a0ffda6 git Not specified
CNA Linux Linux affected 6.12.111 semver Not specified
CNA Linux Linux affected 6.18.53 semver Not specified
CNA Linux Linux unaffected 6.12.111 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.53 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/9eee6b90bee3df496ed9094d9e76d5e478d72d0a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/cc8beb70e70fc90e54efdbc1128cf7de799e6be4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6443f4f20bdae726fe01cf5946fba9742a0ffda6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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