{"id":"CVE-2026-80836","state":"PUBLISHED","title":"crypto: virtio - bound the akcipher result length","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: virtio - bound the akcipher result length\n\nvirtio_crypto_dataq_akcipher_callback() sets the result length from the\ndevice-reported response length without bounding it to the destination\nbuffer, which was allocated for the original request length.\nsg_copy_from_buffer() then reads that many bytes from the destination\nbuffer; a backend reporting a larger length over-reads adjacent kernel\nheap into the caller's scatterlist (an out-of-bounds read).\n\nClamp the reported length to the originally requested destination length.\nA conforming device reports no more than that, so valid results are\nunaffected.","publishedAt":"2026-09-04T15:54:44.981Z","updatedAt":"2026-10-30T12:31:09.682Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a","status":"affected","lessThan":"e0ffee8adc71a0bc548e5ebc6e021c013a874d79","versionType":"git"},{"version":"a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a","status":"affected","lessThan":"bd33cb19bcb432a4dd5e8f50be5e2547af1e9f78","versionType":"git"},{"version":"a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a","status":"affected","lessThan":"12c4f29e97f31b013f77ad65ba7daeb02aaa6abe","versionType":"git"},{"version":"a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a","status":"affected","lessThan":"5545de5050cbc3594506d74f2c392b0716cf8bca","versionType":"git"},{"version":"a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a","status":"affected","lessThan":"3fda114a42f1510a4ec8a0b17a0cfc997952ccc2","versionType":"git"},{"version":"a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a","status":"affected","lessThan":"1f9f877b1ef1fbd4ee95571cddf39c8002cee252","versionType":"git"},{"version":"a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a","status":"affected","lessThan":"f77a956f6a19f9463ef1527c9d0cda50dded6b92","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/crypto/virtio/virtio_crypto_akcipher_algs.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.19","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.111","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.49","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.13","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2.3","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/crypto/virtio/virtio_crypto_akcipher_algs.c"]}],"references":["https://git.kernel.org/stable/c/e0ffee8adc71a0bc548e5ebc6e021c013a874d79","https://git.kernel.org/stable/c/bd33cb19bcb432a4dd5e8f50be5e2547af1e9f78","https://git.kernel.org/stable/c/12c4f29e97f31b013f77ad65ba7daeb02aaa6abe","https://git.kernel.org/stable/c/5545de5050cbc3594506d74f2c392b0716cf8bca","https://git.kernel.org/stable/c/3fda114a42f1510a4ec8a0b17a0cfc997952ccc2","https://git.kernel.org/stable/c/1f9f877b1ef1fbd4ee95571cddf39c8002cee252","https://git.kernel.org/stable/c/f77a956f6a19f9463ef1527c9d0cda50dded6b92"],"weaknesses":[],"ingestedAt":"2026-10-30T12:50:04.827Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/80xxx/CVE-2026-80836.json","commit":"1f312381e38164a43607eebab851b151dd16861e","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-80836","state":"PUBLISHED","datePublished":"2026-09-04T15:54:44.981Z","dateUpdated":"2026-10-30T12:31:09.682Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-26T14:34:25.796Z"},"containers":{"cna":{"title":"crypto: virtio - bound the akcipher result length","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: virtio - bound the akcipher result length\n\nvirtio_crypto_dataq_akcipher_callback() sets the result length from the\ndevice-reported response length without bounding it to the destination\nbuffer, which was allocated for the original request length.\nsg_copy_from_buffer() then reads that many bytes from the destination\nbuffer; a backend reporting a larger length over-reads adjacent kernel\nheap into the caller's scatterlist (an out-of-bounds read).\n\nClamp the reported length to the originally requested destination length.\nA conforming device reports no more than that, so valid results are\nunaffected."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a","status":"affected","lessThan":"e0ffee8adc71a0bc548e5ebc6e021c013a874d79","versionType":"git"},{"version":"a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a","status":"affected","lessThan":"bd33cb19bcb432a4dd5e8f50be5e2547af1e9f78","versionType":"git"},{"version":"a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a","status":"affected","lessThan":"12c4f29e97f31b013f77ad65ba7daeb02aaa6abe","versionType":"git"},{"version":"a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a","status":"affected","lessThan":"5545de5050cbc3594506d74f2c392b0716cf8bca","versionType":"git"},{"version":"a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a","status":"affected","lessThan":"3fda114a42f1510a4ec8a0b17a0cfc997952ccc2","versionType":"git"},{"version":"a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a","status":"affected","lessThan":"1f9f877b1ef1fbd4ee95571cddf39c8002cee252","versionType":"git"},{"version":"a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a","status":"affected","lessThan":"f77a956f6a19f9463ef1527c9d0cda50dded6b92","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/crypto/virtio/virtio_crypto_akcipher_algs.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.19","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.111","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.49","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.13","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2.3","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/crypto/virtio/virtio_crypto_akcipher_algs.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/e0ffee8adc71a0bc548e5ebc6e021c013a874d79"},{"url":"https://git.kernel.org/stable/c/bd33cb19bcb432a4dd5e8f50be5e2547af1e9f78"},{"url":"https://git.kernel.org/stable/c/12c4f29e97f31b013f77ad65ba7daeb02aaa6abe"},{"url":"https://git.kernel.org/stable/c/5545de5050cbc3594506d74f2c392b0716cf8bca"},{"url":"https://git.kernel.org/stable/c/3fda114a42f1510a4ec8a0b17a0cfc997952ccc2"},{"url":"https://git.kernel.org/stable/c/1f9f877b1ef1fbd4ee95571cddf39c8002cee252"},{"url":"https://git.kernel.org/stable/c/f77a956f6a19f9463ef1527c9d0cda50dded6b92"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:31:09.682Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.6.158"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.12.111"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.18.49"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"7.1.13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"7.2.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}