CVE-2026-80832
Full vulnerability record from the local CVENow database.
Description
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.
Severity
Not scored
CVSS score
Not available
Vulnerability status
Received
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-09-04 16:18:11.433000
Last modified
2026-10-19 09:17:18.390000
View original CVE JSON
{
"id": "CVE-2026-80832",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-09-04T16:18:11.433",
"lastModified": "2026-10-19T09:17:18.390",
"vulnStatus": "Received",
"cveTags": [],
"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."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"drivers/crypto/qce/aead.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
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"versionType": "git",
"status": "affected"
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},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"drivers/crypto/qce/aead.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "5.14",
"status": "affected"
},
{
"version": "0",
"lessThan": "5.14",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "5.15.220",
"lessThanOrEqual": "5.15.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.1.187",
"lessThanOrEqual": "6.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.6.156",
"lessThanOrEqual": "6.6.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.108",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18.49",
"lessThanOrEqual": "6.18.*",
"versionType": "semver",
"status": "unaffected"
},
{
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"lessThanOrEqual": "7.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
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"lessThanOrEqual": "7.2.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.3",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {},
"references": [
{
"url": "https://git.kernel.org/stable/c/002f1f99aef7ea631cb687fc17bce64e4963f6aa",
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}