{"id":"CVE-2026-80831","state":"PUBLISHED","title":"crypto: mxs-dcp - fix source scatterlist length access","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: mxs-dcp - fix source scatterlist length access\n\nmxs_dcp_aes_block_crypt() uses sg_dma_len() without mapping the source\nscatterlist with dma_map_sg() first. Therefore, sg_dma_len() is invalid\nand could return zero or a stale DMA length, causing encryption and\ndecryption to process the wrong number of bytes when\nCONFIG_NEED_SG_DMA_LENGTH=y.\n\nUse the original scatterlist length instead.","publishedAt":"2026-09-04T15:54:36.250Z","updatedAt":"2026-10-19T08:44:23.654Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5","status":"affected","lessThan":"fd0f211b27a6ec2ebd8c315683401b43adcc5511","versionType":"git"},{"version":"15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5","status":"affected","lessThan":"04201dcc88b26eac52f736e39727fc5c420b7257","versionType":"git"},{"version":"15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5","status":"affected","lessThan":"e72a795df521cb65b7c4705cc11078cdacfaa2f4","versionType":"git"},{"version":"15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5","status":"affected","lessThan":"1537bd55b4f842565068c54b47cd2ae1777d5f8f","versionType":"git"},{"version":"15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5","status":"affected","lessThan":"da14fae5203b72ca71ccfa9af8de9249e40d533a","versionType":"git"},{"version":"15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5","status":"affected","lessThan":"182f16a20d329a1c818d51dad57d9bf43d356c7c","versionType":"git"},{"version":"15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5","status":"affected","lessThan":"0e9edb108a63bbbef952dfcbc597e34ed9c1fb74","versionType":"git"},{"version":"15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5","status":"affected","lessThan":"6ef9a4afb52cb102ab038cd42352c142d8505d09","versionType":"git"},{"version":"15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5","status":"affected","lessThan":"c5bcb084a9871e5b62afb5f48b60adfa13b5d9f8","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/crypto/mxs-dcp.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.14","versionType":"semver"},{"version":"5.10.269","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.220","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.187","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.156","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.108","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/mxs-dcp.c"]}],"references":["https://git.kernel.org/stable/c/fd0f211b27a6ec2ebd8c315683401b43adcc5511","https://git.kernel.org/stable/c/04201dcc88b26eac52f736e39727fc5c420b7257","https://git.kernel.org/stable/c/e72a795df521cb65b7c4705cc11078cdacfaa2f4","https://git.kernel.org/stable/c/1537bd55b4f842565068c54b47cd2ae1777d5f8f","https://git.kernel.org/stable/c/da14fae5203b72ca71ccfa9af8de9249e40d533a","https://git.kernel.org/stable/c/182f16a20d329a1c818d51dad57d9bf43d356c7c","https://git.kernel.org/stable/c/0e9edb108a63bbbef952dfcbc597e34ed9c1fb74","https://git.kernel.org/stable/c/6ef9a4afb52cb102ab038cd42352c142d8505d09","https://git.kernel.org/stable/c/c5bcb084a9871e5b62afb5f48b60adfa13b5d9f8"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/80xxx/CVE-2026-80831.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-80831","state":"PUBLISHED","datePublished":"2026-09-04T15:54:36.250Z","dateUpdated":"2026-10-19T08:44:23.654Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-26T14:34:25.796Z"},"containers":{"cna":{"title":"crypto: mxs-dcp - fix source scatterlist length access","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: mxs-dcp - fix source scatterlist length access\n\nmxs_dcp_aes_block_crypt() uses sg_dma_len() without mapping the source\nscatterlist with dma_map_sg() first. Therefore, sg_dma_len() is invalid\nand could return zero or a stale DMA length, causing encryption and\ndecryption to process the wrong number of bytes when\nCONFIG_NEED_SG_DMA_LENGTH=y.\n\nUse the original scatterlist length instead."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5","status":"affected","lessThan":"fd0f211b27a6ec2ebd8c315683401b43adcc5511","versionType":"git"},{"version":"15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5","status":"affected","lessThan":"04201dcc88b26eac52f736e39727fc5c420b7257","versionType":"git"},{"version":"15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5","status":"affected","lessThan":"e72a795df521cb65b7c4705cc11078cdacfaa2f4","versionType":"git"},{"version":"15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5","status":"affected","lessThan":"1537bd55b4f842565068c54b47cd2ae1777d5f8f","versionType":"git"},{"version":"15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5","status":"affected","lessThan":"da14fae5203b72ca71ccfa9af8de9249e40d533a","versionType":"git"},{"version":"15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5","status":"affected","lessThan":"182f16a20d329a1c818d51dad57d9bf43d356c7c","versionType":"git"},{"version":"15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5","status":"affected","lessThan":"0e9edb108a63bbbef952dfcbc597e34ed9c1fb74","versionType":"git"},{"version":"15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5","status":"affected","lessThan":"6ef9a4afb52cb102ab038cd42352c142d8505d09","versionType":"git"},{"version":"15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5","status":"affected","lessThan":"c5bcb084a9871e5b62afb5f48b60adfa13b5d9f8","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/crypto/mxs-dcp.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.14","versionType":"semver"},{"version":"5.10.269","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.220","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.187","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.156","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.108","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/mxs-dcp.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/fd0f211b27a6ec2ebd8c315683401b43adcc5511"},{"url":"https://git.kernel.org/stable/c/04201dcc88b26eac52f736e39727fc5c420b7257"},{"url":"https://git.kernel.org/stable/c/e72a795df521cb65b7c4705cc11078cdacfaa2f4"},{"url":"https://git.kernel.org/stable/c/1537bd55b4f842565068c54b47cd2ae1777d5f8f"},{"url":"https://git.kernel.org/stable/c/da14fae5203b72ca71ccfa9af8de9249e40d533a"},{"url":"https://git.kernel.org/stable/c/182f16a20d329a1c818d51dad57d9bf43d356c7c"},{"url":"https://git.kernel.org/stable/c/0e9edb108a63bbbef952dfcbc597e34ed9c1fb74"},{"url":"https://git.kernel.org/stable/c/6ef9a4afb52cb102ab038cd42352c142d8505d09"},{"url":"https://git.kernel.org/stable/c/c5bcb084a9871e5b62afb5f48b60adfa13b5d9f8"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T08:44:23.654Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.14","versionEndExcluding":"5.10.269"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.14","versionEndExcluding":"5.15.220"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.14","versionEndExcluding":"6.1.187"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.14","versionEndExcluding":"6.6.156"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.14","versionEndExcluding":"6.12.108"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.14","versionEndExcluding":"6.18.49"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.14","versionEndExcluding":"7.1.13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.14","versionEndExcluding":"7.2.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.14","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}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