{"id":"CVE-2026-31399","state":"PUBLISHED","title":"nvdimm/bus: Fix potential use after free in asynchronous initialization","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnvdimm/bus: Fix potential use after free in asynchronous initialization\n\nDingisoul with KASAN reports a use after free if device_add() fails in\nnd_async_device_register().\n\nCommit b6eae0f61db2 (\"libnvdimm: Hold reference on parent while\nscheduling async init\") correctly added a reference on the parent device\nto be held until asynchronous initialization was complete.  However, if\ndevice_add() results in an allocation failure the ref count of the\ndevice drops to 0 prior to the parent pointer being accessed.  Thus\nresulting in use after free.\n\nThe bug bot AI correctly identified the fix.  Save a reference to the\nparent pointer to be used to drop the parent reference regardless of the\noutcome of device_add().","publishedAt":"2026-04-03T15:16:03.246Z","updatedAt":"2026-05-23T16:04:55.198Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b6eae0f61db27748606cc00dafcfd1e2c032f0a5","status":"affected","lessThan":"6fc36c2a925ceaba203eb13d75a8f0879a2c121b","versionType":"git"},{"version":"b6eae0f61db27748606cc00dafcfd1e2c032f0a5","status":"affected","lessThan":"a36cf138500e56f50db9f9a33222df6969b38326","versionType":"git"},{"version":"b6eae0f61db27748606cc00dafcfd1e2c032f0a5","status":"affected","lessThan":"9a0fb16ba5b372465a3a1ecd761c6fa911a4ab4d","versionType":"git"},{"version":"b6eae0f61db27748606cc00dafcfd1e2c032f0a5","status":"affected","lessThan":"e48bf8f1d2b12c1c5ba1f609edbd4cde5dadc20e","versionType":"git"},{"version":"b6eae0f61db27748606cc00dafcfd1e2c032f0a5","status":"affected","lessThan":"2c638259ad750833fd46a0cf57672a618542d84c","versionType":"git"},{"version":"b6eae0f61db27748606cc00dafcfd1e2c032f0a5","status":"affected","lessThan":"a226e5b49e5fe8c98b14f8507de670189d191348","versionType":"git"},{"version":"b6eae0f61db27748606cc00dafcfd1e2c032f0a5","status":"affected","lessThan":"84af19855d1abdee3c9d57c0684e2868e391793c","versionType":"git"},{"version":"b6eae0f61db27748606cc00dafcfd1e2c032f0a5","status":"affected","lessThan":"a8aec14230322ed8f1e8042b6d656c1631d41163","versionType":"git"},{"version":"8954771abdea5c34280870e35592c7226a816d95","status":"affected","versionType":"git"},{"version":"3e63a7f25cc85d3d3e174b9b0e3489ebb7eaf4ab","status":"affected","versionType":"git"},{"version":"1490de2bb0836fc0631c04d0559fdf81545b672f","status":"affected","versionType":"git"},{"version":"e31a8418c8df7e6771414f99ed3d95ba8aca4e05","status":"affected","versionType":"git"},{"version":"4f1a55a4f990016406147cf3e0c9487bf83e50f0","status":"affected","versionType":"git"},{"version":"4.4.164","status":"affected","lessThan":"4.5","versionType":"semver"},{"version":"4.9.137","status":"affected","lessThan":"4.10","versionType":"semver"},{"version":"4.14.81","status":"affected","lessThan":"4.15","versionType":"semver"},{"version":"4.18.19","status":"affected","lessThan":"4.19","versionType":"semver"},{"version":"4.19.2","status":"affected","lessThan":"4.20","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/nvdimm/bus.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.20","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.20","versionType":"semver"},{"version":"5.10.253","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.203","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.167","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.130","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.78","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.20","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.10","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/nvdimm/bus.c"]}],"references":["https://git.kernel.org/stable/c/6fc36c2a925ceaba203eb13d75a8f0879a2c121b","https://git.kernel.org/stable/c/a36cf138500e56f50db9f9a33222df6969b38326","https://git.kernel.org/stable/c/9a0fb16ba5b372465a3a1ecd761c6fa911a4ab4d","https://git.kernel.org/stable/c/e48bf8f1d2b12c1c5ba1f609edbd4cde5dadc20e","https://git.kernel.org/stable/c/2c638259ad750833fd46a0cf57672a618542d84c","https://git.kernel.org/stable/c/a226e5b49e5fe8c98b14f8507de670189d191348","https://git.kernel.org/stable/c/84af19855d1abdee3c9d57c0684e2868e391793c","https://git.kernel.org/stable/c/a8aec14230322ed8f1e8042b6d656c1631d41163"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/31xxx/CVE-2026-31399.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-31399","state":"PUBLISHED","datePublished":"2026-04-03T15:16:03.246Z","dateUpdated":"2026-05-23T16:04:55.198Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-03-09T15:48:24.085Z"},"containers":{"cna":{"title":"nvdimm/bus: Fix potential use after free in asynchronous initialization","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnvdimm/bus: Fix potential use after free in asynchronous initialization\n\nDingisoul with KASAN reports a use after free if device_add() fails in\nnd_async_device_register().\n\nCommit b6eae0f61db2 (\"libnvdimm: Hold reference on parent while\nscheduling async init\") correctly added a reference on the parent device\nto be held until asynchronous initialization was complete.  However, if\ndevice_add() results in an allocation failure the ref count of the\ndevice drops to 0 prior to the parent pointer being accessed.  Thus\nresulting in use after free.\n\nThe bug bot AI correctly identified the fix.  Save a reference to the\nparent pointer to be used to drop the parent reference regardless of the\noutcome of device_add()."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b6eae0f61db27748606cc00dafcfd1e2c032f0a5","status":"affected","lessThan":"6fc36c2a925ceaba203eb13d75a8f0879a2c121b","versionType":"git"},{"version":"b6eae0f61db27748606cc00dafcfd1e2c032f0a5","status":"affected","lessThan":"a36cf138500e56f50db9f9a33222df6969b38326","versionType":"git"},{"version":"b6eae0f61db27748606cc00dafcfd1e2c032f0a5","status":"affected","lessThan":"9a0fb16ba5b372465a3a1ecd761c6fa911a4ab4d","versionType":"git"},{"version":"b6eae0f61db27748606cc00dafcfd1e2c032f0a5","status":"affected","lessThan":"e48bf8f1d2b12c1c5ba1f609edbd4cde5dadc20e","versionType":"git"},{"version":"b6eae0f61db27748606cc00dafcfd1e2c032f0a5","status":"affected","lessThan":"2c638259ad750833fd46a0cf57672a618542d84c","versionType":"git"},{"version":"b6eae0f61db27748606cc00dafcfd1e2c032f0a5","status":"affected","lessThan":"a226e5b49e5fe8c98b14f8507de670189d191348","versionType":"git"},{"version":"b6eae0f61db27748606cc00dafcfd1e2c032f0a5","status":"affected","lessThan":"84af19855d1abdee3c9d57c0684e2868e391793c","versionType":"git"},{"version":"b6eae0f61db27748606cc00dafcfd1e2c032f0a5","status":"affected","lessThan":"a8aec14230322ed8f1e8042b6d656c1631d41163","versionType":"git"},{"version":"8954771abdea5c34280870e35592c7226a816d95","status":"affected","versionType":"git"},{"version":"3e63a7f25cc85d3d3e174b9b0e3489ebb7eaf4ab","status":"affected","versionType":"git"},{"version":"1490de2bb0836fc0631c04d0559fdf81545b672f","status":"affected","versionType":"git"},{"version":"e31a8418c8df7e6771414f99ed3d95ba8aca4e05","status":"affected","versionType":"git"},{"version":"4f1a55a4f990016406147cf3e0c9487bf83e50f0","status":"affected","versionType":"git"},{"version":"4.4.164","status":"affected","lessThan":"4.5","versionType":"semver"},{"version":"4.9.137","status":"affected","lessThan":"4.10","versionType":"semver"},{"version":"4.14.81","status":"affected","lessThan":"4.15","versionType":"semver"},{"version":"4.18.19","status":"affected","lessThan":"4.19","versionType":"semver"},{"version":"4.19.2","status":"affected","lessThan":"4.20","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/nvdimm/bus.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.20","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.20","versionType":"semver"},{"version":"5.10.253","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.203","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.167","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.130","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.78","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.20","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.10","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/nvdimm/bus.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/6fc36c2a925ceaba203eb13d75a8f0879a2c121b"},{"url":"https://git.kernel.org/stable/c/a36cf138500e56f50db9f9a33222df6969b38326"},{"url":"https://git.kernel.org/stable/c/9a0fb16ba5b372465a3a1ecd761c6fa911a4ab4d"},{"url":"https://git.kernel.org/stable/c/e48bf8f1d2b12c1c5ba1f609edbd4cde5dadc20e"},{"url":"https://git.kernel.org/stable/c/2c638259ad750833fd46a0cf57672a618542d84c"},{"url":"https://git.kernel.org/stable/c/a226e5b49e5fe8c98b14f8507de670189d191348"},{"url":"https://git.kernel.org/stable/c/84af19855d1abdee3c9d57c0684e2868e391793c"},{"url":"https://git.kernel.org/stable/c/a8aec14230322ed8f1e8042b6d656c1631d41163"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-23T16:04:55.198Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"5.10.253"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"5.15.203"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"6.1.167"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"6.6.130"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"6.12.78"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"6.18.20"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"6.19.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"7.0"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4.164"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9.137"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14.81"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18.19"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}