{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-68435","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-07-30T09:28:09.393Z","datePublished":"2026-08-12T00:07:23.359Z","dateUpdated":"2026-08-17T05:05:31.962Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-17T05:05:31.962Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nLoongArch: Fix address space mismatch in kexec command line lookup\n\nWhen searching the loaded segments for the \"kexec\" command line marker,\nthe kexec_load(2) path (file_mode == 0) passes the user-space segment\nbuffer straight to strncmp() through a bogus (char __user *) cast. This\ndereferences a user pointer in kernel context, which is wrong and is\nflagged by sparse:\n\n  arch/loongarch/kernel/machine_kexec.c:84:51: sparse: incorrect type in\n  argument 2 (different address spaces) @@ expected char const * @@ got\n  char [noderef] __user *\n\nHere copy the marker-sized prefix of each segment into a small on-stack\nbuffer with copy_from_user() before comparing, and skip segments that\nfault. The subsequent copy_from_user() that stages the full command line\ninto the safe area is left unchanged."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/loongarch/kernel/machine_kexec.c"],"versions":[{"version":"4a03b2ac06a5bcae29371866d9d11f5bfd4c9188","lessThan":"a94d6726ec8680a2b0c453fc782a543f68a1ea06","status":"affected","versionType":"git"},{"version":"4a03b2ac06a5bcae29371866d9d11f5bfd4c9188","lessThan":"7a54e0cbaad4a5a09e7cc7a4f05d181048e98ca7","status":"affected","versionType":"git"},{"version":"4a03b2ac06a5bcae29371866d9d11f5bfd4c9188","lessThan":"485ed44db5694d8d2e5027f63ad608e705286f30","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/loongarch/kernel/machine_kexec.c"],"versions":[{"version":"6.1","status":"affected"},{"version":"0","lessThan":"6.1","status":"unaffected","versionType":"semver"},{"version":"6.18.42","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.1.6","lessThanOrEqual":"7.1.*","status":"unaffected","versionType":"semver"},{"version":"7.2","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"6.18.42"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"7.1.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"7.2"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/a94d6726ec8680a2b0c453fc782a543f68a1ea06"},{"url":"https://git.kernel.org/stable/c/7a54e0cbaad4a5a09e7cc7a4f05d181048e98ca7"},{"url":"https://git.kernel.org/stable/c/485ed44db5694d8d2e5027f63ad608e705286f30"}],"title":"LoongArch: Fix address space mismatch in kexec command line lookup","x_generator":{"engine":"bippy-1.2.0"}}}}