CVE-2026-80832
Estado: RecibidaSin puntuar—
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:
while the DMA length is set to:
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:
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:
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Fix the allocation by adding the maximum possible AAD header length before alignment:
This guarantees that the allocated buffer is large enough for the fully padded AAD data for all supported header sizes.
Detalles técnicos trazas, registros y código del informe original
ALIGN(assoclen, 16) + MAX_CCM_ADATA_HEADER_LEN ALIGN(assoclen + adata_header_len, 16) allocation = ALIGN(32, 16) + 6 = 38 DMA length = ALIGN(32 + 2, 16) = 48 alg: aead: ccm-aes-qce encryption test failed (wrong result) on test vector 8 ALIGN(assoclen + MAX_CCM_ADATA_HEADER_LEN, 16)
CVSS
NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.18%
- Percentil entre todas las CVEs puntuadas: 7
- Fecha de la puntuación: 5/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
- https://git.kernel.org/stable/c/002f1f99aef7ea631cb687fc17bce64e4963f6aa
- https://git.kernel.org/stable/c/11775b35ce9f27e73d62188d7d38aa0dc0a219aa
- https://git.kernel.org/stable/c/2f65718b9c1095eef1ae9b374aa0384b1b083f3c
- https://git.kernel.org/stable/c/46a84efe2dbaddde89073a3c00c694486937c34b
- https://git.kernel.org/stable/c/4839f4c21f9c577eedef2919ced878a3057c7fc3
- https://git.kernel.org/stable/c/7f2345f47dd189625f657cd72437179ab4170ee1
- https://git.kernel.org/stable/c/c9e0f06a023107694698a7930616aeb460d91816
- https://git.kernel.org/stable/c/cc56d2b0d77cfeea061e98114992ee687d5eb4dd
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-80832",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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{
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{
"status": "unaffected",
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{
"status": "unaffected",
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{
"status": "unaffected",
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},
{
"status": "unaffected",
"version": "6.6.156",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.108",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
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{
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],
"published": "2026-09-04T16:18:11.433",
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{
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{
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{
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: qce - fix CCM AAD buffer underallocation\n\nThe AAD buffer allocated in qce_aead_ccm_prepare_buf_assoclen()\ncan be smaller than the length later programmed into the DMA\nscatterlist.\n\nThe allocation size is currently calculated as:\n\n ALIGN(assoclen, 16) + MAX_CCM_ADATA_HEADER_LEN\n\nwhile the DMA length is set to:\n\n ALIGN(assoclen + adata_header_len, 16)\n\nSince ALIGN() does not distribute over addition, the allocation\ncan be smaller than the DMA length. For example, when\nassoclen = 32 and adata_header_len = 2:\n\n allocation = ALIGN(32, 16) + 6 = 38\n DMA length = ALIGN(32 + 2, 16) = 48\n\nAs a result, the QCE hardware can read beyond the allocated\nbuffer while computing the CBC-MAC over the associated data.\nThe extra bytes are folded into the authentication tag,\nresulting in an incorrect tag and causing CCM self-test\nfailures such as:\n\n alg: aead: ccm-aes-qce encryption test failed (wrong result)\n on test vector 8\n\nFix the allocation by adding the maximum possible AAD header\nlength before alignment:\n\n ALIGN(assoclen + MAX_CCM_ADATA_HEADER_LEN, 16)\n\nThis guarantees that the allocated buffer is large enough\nfor the fully padded AAD data for all supported header sizes."
}
],
"lastModified": "2026-09-04T16:18:11.433",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}