{"id":"CVE-2026-80832","title":"crypto: qce - fix CCM AAD buffer underallocation","summary":"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 t…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 9363efb4181c5e0fbf86bdfa759262aa29f0eb50 < 11775b35ce9f27e73d62188d7d38aa0dc0a219aa","Linux >= 9363efb4181c5e0fbf86bdfa759262aa29f0eb50 < c9e0f06a023107694698a7930616aeb460d91816","Linux >= 9363efb4181c5e0fbf86bdfa759262aa29f0eb50 < cc56d2b0d77cfeea061e98114992ee687d5eb4dd","Linux >= 9363efb4181c5e0fbf86bdfa759262aa29f0eb50 < 002f1f99aef7ea631cb687fc17bce64e4963f6aa","Linux >= 9363efb4181c5e0fbf86bdfa759262aa29f0eb50 < 2f65718b9c1095eef1ae9b374aa0384b1b083f3c","Linux >= 9363efb4181c5e0fbf86bdfa759262aa29f0eb50 < 46a84efe2dbaddde89073a3c00c694486937c34b","Linux >= 9363efb4181c5e0fbf86bdfa759262aa29f0eb50 < 4839f4c21f9c577eedef2919ced878a3057c7fc3","Linux >= 9363efb4181c5e0fbf86bdfa759262aa29f0eb50 < 7f2345f47dd189625f657cd72437179ab4170ee1","Linux 5.14"],"published":"2026-09-04","updated":"2026-10-19","sourceUpdated":"2026-10-19T08:44:24.636Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80832","references":[{"url":"https://git.kernel.org/stable/c/11775b35ce9f27e73d62188d7d38aa0dc0a219aa"},{"url":"https://git.kernel.org/stable/c/c9e0f06a023107694698a7930616aeb460d91816"},{"url":"https://git.kernel.org/stable/c/cc56d2b0d77cfeea061e98114992ee687d5eb4dd"},{"url":"https://git.kernel.org/stable/c/002f1f99aef7ea631cb687fc17bce64e4963f6aa"},{"url":"https://git.kernel.org/stable/c/2f65718b9c1095eef1ae9b374aa0384b1b083f3c"},{"url":"https://git.kernel.org/stable/c/46a84efe2dbaddde89073a3c00c694486937c34b"},{"url":"https://git.kernel.org/stable/c/4839f4c21f9c577eedef2919ced878a3057c7fc3"},{"url":"https://git.kernel.org/stable/c/7f2345f47dd189625f657cd72437179ab4170ee1"}],"tags":["cve.org"],"epss":0.00178,"epssPercentile":0.06888,"ingestedAt":"2026-10-19T09:16:01.500Z","slug":"CVE-2026-80832","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= 9363efb4181c5e0fbf86bdfa759262aa29f0eb50 < 11775b35ce9f27e73d62188d7d38aa0dc0a219aa`\n- `Linux >= 9363efb4181c5e0fbf86bdfa759262aa29f0eb50 < c9e0f06a023107694698a7930616aeb460d91816`\n- `Linux >= 9363efb4181c5e0fbf86bdfa759262aa29f0eb50 < cc56d2b0d77cfeea061e98114992ee687d5eb4dd`\n- `Linux >= 9363efb4181c5e0fbf86bdfa759262aa29f0eb50 < 002f1f99aef7ea631cb687fc17bce64e4963f6aa`\n- `Linux >= 9363efb4181c5e0fbf86bdfa759262aa29f0eb50 < 2f65718b9c1095eef1ae9b374aa0384b1b083f3c`\n- `Linux >= 9363efb4181c5e0fbf86bdfa759262aa29f0eb50 < 46a84efe2dbaddde89073a3c00c694486937c34b`\n- `Linux >= 9363efb4181c5e0fbf86bdfa759262aa29f0eb50 < 4839f4c21f9c577eedef2919ced878a3057c7fc3`\n- `Linux >= 9363efb4181c5e0fbf86bdfa759262aa29f0eb50 < 7f2345f47dd189625f657cd72437179ab4170ee1`\n- `Linux 5.14`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}