{"id":"CVE-2026-80832","summary":"crypto: qce - fix CCM AAD buffer underallocation","details":"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.","modified":"2026-09-06T03:46:50.934945552Z","published":"2026-09-04T15:54:40.017Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80832.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/002f1f99aef7ea631cb687fc17bce64e4963f6aa"},{"type":"WEB","url":"https://git.kernel.org/stable/c/11775b35ce9f27e73d62188d7d38aa0dc0a219aa"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2f65718b9c1095eef1ae9b374aa0384b1b083f3c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/46a84efe2dbaddde89073a3c00c694486937c34b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4839f4c21f9c577eedef2919ced878a3057c7fc3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7f2345f47dd189625f657cd72437179ab4170ee1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c9e0f06a023107694698a7930616aeb460d91816"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cc56d2b0d77cfeea061e98114992ee687d5eb4dd"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80832.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80832"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"9363efb4181c5e0fbf86bdfa759262aa29f0eb50"},{"fixed":"11775b35ce9f27e73d62188d7d38aa0dc0a219aa"},{"fixed":"c9e0f06a023107694698a7930616aeb460d91816"},{"fixed":"cc56d2b0d77cfeea061e98114992ee687d5eb4dd"},{"fixed":"002f1f99aef7ea631cb687fc17bce64e4963f6aa"},{"fixed":"2f65718b9c1095eef1ae9b374aa0384b1b083f3c"},{"fixed":"46a84efe2dbaddde89073a3c00c694486937c34b"},{"fixed":"4839f4c21f9c577eedef2919ced878a3057c7fc3"},{"fixed":"7f2345f47dd189625f657cd72437179ab4170ee1"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80832.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.14.0"},{"fixed":"5.15.220"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.187"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.156"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.108"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.49"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.13"}]},{"type":"ECOSYSTEM","events":[{"introduced":"7.2.0"},{"fixed":"7.2.3"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80832.json"}}],"schema_version":"1.9.0"}