Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: crypto: ixp4xx - fix buffer chain unwind on allocation failure chainup_buffers() builds a linked list of buffer descriptors for a scatterlist. If dma_pool_alloc() fails while constructing the list, the current code sets buf to NULL and later dereferences it unconditionally at the end of the function: buf->next = NULL; buf->phys_next = 0; This can lead to a null-pointer dereference on allocation failure. If the failure happens after part of the descriptor chain has already been allocated and DMA-mapped, the partially constructed chain also needs to be released. Fix this by terminating the partially constructed chain on allocation failure and letting the callers unwind it via their existing cleanup paths. Also fix ablk_perform() to preserve the hook pointers before checking for failure, so partially built chains can be freed correctly.
References
- https://git.kernel.org/stable/c/028a7f4f3d69e551f6bf9f728d547bbf4cfc707d
- https://git.kernel.org/stable/c/04cb00106ca4d0fa9eca24cadc4eda6036e855c8
- https://git.kernel.org/stable/c/25056329384010a8672552b134f609601dc4f80e
- https://git.kernel.org/stable/c/4918b0bd7d2baafb45d87dca9e322137c96005c2
- https://git.kernel.org/stable/c/8c37bc8d6a6f77bf9593fb1bcab6c14c7cf02991
- https://git.kernel.org/stable/c/d4007867be42d71795b78fa7f8ce7514dda9ca83
FAQ
What is CVE-2026-97506?
CVE-2026-97506 is a documented vulnerability. In the Linux kernel, the following vulnerability has been resolved: crypto: ixp4xx - fix buffer chain unwind on allocation failure chainup_buffers() builds a linked list of buffer descriptors for a ...
How severe is CVE-2026-97506?
CVSS scoring is not yet available for CVE-2026-97506. Check NVD for updates.
Is there a patch for CVE-2026-97506?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.