{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-23432","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-01-13T15:37:46.016Z","datePublished":"2026-04-03T15:15:18.061Z","dateUpdated":"2026-05-11T22:06:47.673Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T22:06:47.673Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmshv: Fix use-after-free in mshv_map_user_memory error path\n\nIn the error path of mshv_map_user_memory(), calling vfree() directly on\nthe region leaves the MMU notifier registered. When userspace later unmaps\nthe memory, the notifier fires and accesses the freed region, causing a\nuse-after-free and potential kernel panic.\n\nReplace vfree() with mshv_partition_put() to properly unregister\nthe MMU notifier before freeing the region."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"}}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hv/mshv_root_main.c"],"versions":[{"version":"b9a66cd5ccbb9fade15d0e427e19470d8ad35b75","lessThan":"34861bdc0c0196b6c2dd48f7454029407704ff6e","status":"affected","versionType":"git"},{"version":"b9a66cd5ccbb9fade15d0e427e19470d8ad35b75","lessThan":"6922db250422a0dfee34de322f86b7a73d713d33","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hv/mshv_root_main.c"],"versions":[{"version":"6.19","status":"affected"},{"version":"0","lessThan":"6.19","status":"unaffected","versionType":"semver"},{"version":"6.19.10","lessThanOrEqual":"6.19.*","status":"unaffected","versionType":"semver"},{"version":"7.0","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":"6.19","versionEndExcluding":"6.19.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19","versionEndExcluding":"7.0"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/34861bdc0c0196b6c2dd48f7454029407704ff6e"},{"url":"https://git.kernel.org/stable/c/6922db250422a0dfee34de322f86b7a73d713d33"}],"title":"mshv: Fix use-after-free in mshv_map_user_memory error path","x_generator":{"engine":"bippy-1.2.0"}}}}