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crypto: qce - fix CCM AAD buffer underallocation

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: crypto: qce - fix CCM AAD buffer underallocation The AAD buffer allocated in qce_aead_ccm_prepare_buf_assoclen() can be smaller than the length later programmed into the DMA scatterlist. The allocation size is currently calculated as: ALIGN(assoclen, 16) + MAX_CCM_ADATA_HEADER_LEN while the DMA length is set to: ALIGN(assoclen + adata_header_len, 16) Since ALIGN() does not distribute over addition, the allocation can be smaller than the DMA length. For example, when assoclen = 32 and adata_header_len = 2: allocation = ALIGN(32, 16) + 6 = 38 DMA length = ALIGN(32 + 2, 16) = 48 As a result, the QCE hardware can read beyond the allocated buffer while computing the CBC-MAC over the associated data. The extra bytes are folded into the authentication tag, resulting in an incorrect tag and causing CCM self-test failures such as: alg: aead: ccm-aes-qce encryption test failed (wrong result) on test vector 8 Fix the allocation by adding the maximum possible AAD header length before alignment: ALIGN(assoclen + MAX_CCM_ADATA_HEADER_LEN, 16) This guarantees that the allocated buffer is large enough for the fully padded AAD data for all supported header sizes.

Announced Source revision 1
Original source ↗

CVE-2026-80832

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-2026-80832

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": "9363efb4181c5e0fbf86bdfa759262aa29f0eb50",
        "lessThan": "11775b35ce9f27e73d62188d7d38aa0dc0a219aa",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9363efb4181c5e0fbf86bdfa759262aa29f0eb50",
        "lessThan": "c9e0f06a023107694698a7930616aeb460d91816",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9363efb4181c5e0fbf86bdfa759262aa29f0eb50",
        "lessThan": "cc56d2b0d77cfeea061e98114992ee687d5eb4dd",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9363efb4181c5e0fbf86bdfa759262aa29f0eb50",
        "lessThan": "002f1f99aef7ea631cb687fc17bce64e4963f6aa",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9363efb4181c5e0fbf86bdfa759262aa29f0eb50",
        "lessThan": "2f65718b9c1095eef1ae9b374aa0384b1b083f3c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9363efb4181c5e0fbf86bdfa759262aa29f0eb50",
        "lessThan": "46a84efe2dbaddde89073a3c00c694486937c34b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9363efb4181c5e0fbf86bdfa759262aa29f0eb50",
        "lessThan": "4839f4c21f9c577eedef2919ced878a3057c7fc3",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9363efb4181c5e0fbf86bdfa759262aa29f0eb50",
        "lessThan": "7f2345f47dd189625f657cd72437179ab4170ee1",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/crypto/qce/aead.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.14"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.14",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.15.220",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.187",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.156",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.108",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.49",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.13",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.3",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/crypto/qce/aead.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-80832

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#34848 · Revision 1
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