CVE-2026-80832 (GCVE-0-2026-80832)
Vulnerability from cvelistv5
Published
2026-09-04 15:54
Modified
2026-09-04 15:54
Severity ?
VLAI Severity ?
EPSS score ?
Summary
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.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: 9363efb4181c5e0fbf86bdfa759262aa29f0eb50 Version: 9363efb4181c5e0fbf86bdfa759262aa29f0eb50 Version: 9363efb4181c5e0fbf86bdfa759262aa29f0eb50 Version: 9363efb4181c5e0fbf86bdfa759262aa29f0eb50 Version: 9363efb4181c5e0fbf86bdfa759262aa29f0eb50 Version: 9363efb4181c5e0fbf86bdfa759262aa29f0eb50 Version: 9363efb4181c5e0fbf86bdfa759262aa29f0eb50 Version: 9363efb4181c5e0fbf86bdfa759262aa29f0eb50 |
||
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"descriptions": [
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"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."
}
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"providerMetadata": {
"dateUpdated": "2026-09-04T15:54:40.017Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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{
"url": "https://git.kernel.org/stable/c/7f2345f47dd189625f657cd72437179ab4170ee1"
}
],
"title": "crypto: qce - fix CCM AAD buffer underallocation",
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"cveId": "CVE-2026-80832",
"datePublished": "2026-09-04T15:54:40.017Z",
"dateReserved": "2026-08-26T14:34:25.796Z",
"dateUpdated": "2026-09-04T15:54:40.017Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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