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crypto: ixp4xx - fix buffer chain unwind on allocation failure

Type: advisorySource: Official CVE List1 source record

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.

Announced Group revision 1
Original source ↗

CVE-2026-97506

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-97506

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "0d44dc59b2b434b29aafeae581d06f81efac7c83",
        "lessThan": "d4007867be42d71795b78fa7f8ce7514dda9ca83",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0d44dc59b2b434b29aafeae581d06f81efac7c83",
        "lessThan": "4918b0bd7d2baafb45d87dca9e322137c96005c2",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0d44dc59b2b434b29aafeae581d06f81efac7c83",
        "lessThan": "8c37bc8d6a6f77bf9593fb1bcab6c14c7cf02991",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0d44dc59b2b434b29aafeae581d06f81efac7c83",
        "lessThan": "04cb00106ca4d0fa9eca24cadc4eda6036e855c8",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0d44dc59b2b434b29aafeae581d06f81efac7c83",
        "lessThan": "028a7f4f3d69e551f6bf9f728d547bbf4cfc707d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0d44dc59b2b434b29aafeae581d06f81efac7c83",
        "lessThan": "25056329384010a8672552b134f609601dc4f80e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5a80273150a8a1725fa70418d106eb1f2ee8fd2f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "82a8becb9c2c52fc5e67057a43aeded1f0731e7b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "68845515c8b11791b547a2838e22c27dfa3115ee",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "2.6.27.22",
        "lessThan": "2.6.28",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "2.6.28.10",
        "lessThan": "2.6.29",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "2.6.29.3",
        "lessThan": "2.6.30",
        "versionType": "semver"
      }
    ],
    "programFiles": [
      "drivers/crypto/intel/ixp4xx/ixp4xx_crypto.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "2.6.30"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "2.6.30",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.15.222",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.189",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.158",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.111",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.53",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/crypto/intel/ixp4xx/ixp4xx_crypto.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-97506

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#8356 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement

Revision history

  1. CVE-2026-97506 · Revision 1Source updated