{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98653","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-25T10:25:14.362Z","datePublished":"2026-10-18T15:20:24.848Z","dateUpdated":"2026-10-19T09:23:22.624Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-10-19T09:23:22.624Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: s390: Fix _gaccess_shadow_fault()\n\nIn some circumstances, it is possible that the page of nested guest\nmemory that is being shadowed is not present at all in the parent guest\ngmap. dat_entry_walk() will not find any leaf entry and return with\n-ENOENT, which will erroneously be propagated all the way to userspace.\n\nFix by manually calling gmap_link() on the memory of the nested guest\nthat is being shadowed if the mapping was not already present."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/s390/kvm/s390/gaccess.c"],"versions":[{"version":"e38c884df92119d96f652d51f82661dd2fc0b885","lessThan":"94c43c7df46433ed4d1e18f13770b019ba977bd8","status":"affected","versionType":"git"},{"version":"e38c884df92119d96f652d51f82661dd2fc0b885","lessThan":"faff4c8ff3dbec6d71b89dd281a0d17c4478fa44","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/s390/kvm/s390/gaccess.c"],"versions":[{"version":"7.0","status":"affected"},{"version":"0","lessThan":"7.0","status":"unaffected","versionType":"semver"},{"version":"7.2.9","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","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":"7.0","versionEndExcluding":"7.2.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"7.0","versionEndExcluding":"7.3"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/94c43c7df46433ed4d1e18f13770b019ba977bd8"},{"url":"https://git.kernel.org/stable/c/faff4c8ff3dbec6d71b89dd281a0d17c4478fa44"}],"title":"KVM: s390: Fix _gaccess_shadow_fault()","x_generator":{"engine":"bippy-1.2.0"}}}}