GHSA-P5W3-Q665-Q5V8
Vulnerability from github – Published: 2026-09-11 21:31 – Updated: 2026-09-21 15:31In the Linux kernel, the following vulnerability has been resolved:
crypto: iaa - unmap dst before software fallback on decompress
On a hardware analytics error, decompress retries through the software fallback, which writes req->dst with the CPU while it is still mapped DMA_FROM_DEVICE. With SWIOTLB active the later dma_unmap_sg() copies the stale bounce buffer over req->dst, corrupting the result.
Unmap before the fallback runs. The async path unmaps inline; the sync path signals the retry with -EAGAIN so iaa_comp_adecompress() runs the fallback after unmapping.
{
"affected": [],
"aliases": [
"CVE-2026-80945"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-11T20:19:00Z",
"severity": "CRITICAL"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: iaa - unmap dst before software fallback on decompress\n\nOn a hardware analytics error, decompress retries through the software\nfallback, which writes req-\u003edst with the CPU while it is still mapped\nDMA_FROM_DEVICE. With SWIOTLB active the later dma_unmap_sg() copies the\nstale bounce buffer over req-\u003edst, corrupting the result.\n\nUnmap before the fallback runs. The async path unmaps inline; the sync\npath signals the retry with -EAGAIN so iaa_comp_adecompress() runs the\nfallback after unmapping.",
"id": "GHSA-p5w3-q665-q5v8",
"modified": "2026-09-21T15:31:35Z",
"published": "2026-09-11T21:31:20Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80945"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/94a25930477113730372e0fa2985da4c5ac95c9a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c0279e5ea2aad99d8b91f1a6579d751cc9eb2408"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/fc933a4a419ba8a75da28666a018602c44846953"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/fcd86180ef78b0e41763faef7c6d2de7dfb50c1a"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
}
]
}
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