CVE-2026-97506
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.
Affected versions
Linux kernel versions
2.6.27.22,
2.6.28.10,
2.6.29.3,
2.6.30
and later are affected. Fixed in
5.15.222,
6.1.189,
6.6.158,
6.12.111,
6.18.53,
7.2
and their respective stable series.
References
6 totalFrequently asked questions
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What is CVE-2026-97506?
CVE-2026-97506 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 2.6.27.22 onward and has been patched in 5.15.222, 6.1.189, 6.6.158 and others. CVE-2026-97506 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-97506?
Yes. CVE-2026-97506 has been patched. Fixed versions include 5.15.222, 6.1.189, 6.6.158 and others. If you are running Linux kernel 2.6.27.22 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-97506 actively exploited?
No. CVE-2026-97506 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.