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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-97506

crypto: ixp4xx - fix buffer chain unwind on allocation failure

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Status
Published
Published
Updated
Assigning organization
Linux

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 0d44dc59b2b434b29aafeae581d06f81efac7c83 to < d4007867be42d71795b78fa7f8ce7514dda9ca83affected
  • 0d44dc59b2b434b29aafeae581d06f81efac7c83 to < 4918b0bd7d2baafb45d87dca9e322137c96005c2affected
  • 0d44dc59b2b434b29aafeae581d06f81efac7c83 to < 8c37bc8d6a6f77bf9593fb1bcab6c14c7cf02991affected
  • 0d44dc59b2b434b29aafeae581d06f81efac7c83 to < 04cb00106ca4d0fa9eca24cadc4eda6036e855c8affected
  • 0d44dc59b2b434b29aafeae581d06f81efac7c83 to < 028a7f4f3d69e551f6bf9f728d547bbf4cfc707daffected
  • 0d44dc59b2b434b29aafeae581d06f81efac7c83 to < 25056329384010a8672552b134f609601dc4f80eaffected
  • 5a80273150a8a1725fa70418d106eb1f2ee8fd2faffected
  • 82a8becb9c2c52fc5e67057a43aeded1f0731e7baffected
  • 68845515c8b11791b547a2838e22c27dfa3115eeaffected
  • 2.6.27.22 to < 2.6.28affected
  • 2.6.28.10 to < 2.6.29affected
  • 2.6.29.3 to < 2.6.30affected

Linux Linux

Default version status: affected

  • 2.6.30affected
  • 0 to < 2.6.30unaffected
  • 5.15.222 to ≤ 5.15.*unaffected
  • 6.1.189 to ≤ 6.1.*unaffected
  • 6.6.158 to ≤ 6.6.*unaffected
  • 6.12.111 to ≤ 6.12.*unaffected
  • 6.18.53 to ≤ 6.18.*unaffected
  • 7.2 to ≤ *unaffected

References