{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64244","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-07-19T15:36:31.772Z","datePublished":"2026-07-24T15:29:59.891Z","dateUpdated":"2026-08-17T04:51:55.230Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-17T04:51:55.230Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrivers/base/memory: set mem->altmap after successful device registration\n\nIf __add_memory_block() fails at xa_store() (under memory pressure for\nexample), device_unregister() is called, which eventually triggers\nmemory_block_release() with mem->altmap still set, causing a\nWARN_ON(mem->altmap).  This was triggered by modifying virtio-mem driver.\n\nFix this by delaying the assignment of mem->altmap until after\n__add_memory_block() has succeeded."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/base/memory.c"],"versions":[{"version":"1a8c64e110435e44e71bcd50a75663174b575f22","lessThan":"802e113cf120df7208e4c7e604950a85e87120a8","status":"affected","versionType":"git"},{"version":"1a8c64e110435e44e71bcd50a75663174b575f22","lessThan":"22dc0d042f02ce82aa61422ea5f232628bfd9e9c","status":"affected","versionType":"git"},{"version":"1a8c64e110435e44e71bcd50a75663174b575f22","lessThan":"6c25bf4e44a2b6a14332f952bba0974521f5b72d","status":"affected","versionType":"git"},{"version":"1a8c64e110435e44e71bcd50a75663174b575f22","lessThan":"bc3dd82a0ffd488bb902f4c69c3d28fd4088d973","status":"affected","versionType":"git"},{"version":"1a8c64e110435e44e71bcd50a75663174b575f22","lessThan":"059ac6252a63edf1cea79bf30bd860a8c264b62c","status":"affected","versionType":"git"},{"version":"1a8c64e110435e44e71bcd50a75663174b575f22","lessThan":"a2b8d7827f48ee54a686cb80e4a1d0ff954ec42a","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/base/memory.c"],"versions":[{"version":"6.6","status":"affected"},{"version":"0","lessThan":"6.6","status":"unaffected","versionType":"semver"},{"version":"6.6.144","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.95","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.37","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.0.14","lessThanOrEqual":"7.0.*","status":"unaffected","versionType":"semver"},{"version":"7.1.2","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":"6.6","versionEndExcluding":"6.6.144"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.12.95"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.18.37"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"7.0.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"7.1.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"7.2"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/802e113cf120df7208e4c7e604950a85e87120a8"},{"url":"https://git.kernel.org/stable/c/22dc0d042f02ce82aa61422ea5f232628bfd9e9c"},{"url":"https://git.kernel.org/stable/c/6c25bf4e44a2b6a14332f952bba0974521f5b72d"},{"url":"https://git.kernel.org/stable/c/bc3dd82a0ffd488bb902f4c69c3d28fd4088d973"},{"url":"https://git.kernel.org/stable/c/059ac6252a63edf1cea79bf30bd860a8c264b62c"},{"url":"https://git.kernel.org/stable/c/a2b8d7827f48ee54a686cb80e4a1d0ff954ec42a"}],"title":"drivers/base/memory: set mem->altmap after successful device registration","x_generator":{"engine":"bippy-1.2.0"}}}}