{"id":"CVE-2026-72316","state":"PUBLISHED","title":"dm era: fix NULL pointer dereference in metadata_open()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndm era: fix NULL pointer dereference in metadata_open()\n\nmetadata_open() returns NULL when kzalloc_obj() fails, but the\ncaller era_ctr() only checks IS_ERR(md).  Since IS_ERR(NULL)\nreturns false, the NULL pointer is treated as a valid result\nand later assigned to era->md, leading to a NULL pointer\ndereference when the metadata is accessed.\n\nFix this by returning ERR_PTR(-ENOMEM) on allocation failure,\nconsistent with dm-cache-metadata.c, dm-thin-metadata.c, and\ndm-clone-metadata.c which all use ERR_PTR(-ENOMEM) for the\nsame pattern.","publishedAt":"2026-08-15T05:55:30.399Z","updatedAt":"2026-08-17T05:12:21.813Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"eec40579d84873dfb7021eb24c50360f073237c5","status":"affected","lessThan":"a705e056c2f3dd067fb2ff414f0537530baa090b","versionType":"git"},{"version":"eec40579d84873dfb7021eb24c50360f073237c5","status":"affected","lessThan":"bd5a80128bdfc93b1cae935a70da000b8c483e6e","versionType":"git"},{"version":"eec40579d84873dfb7021eb24c50360f073237c5","status":"affected","lessThan":"17eb2ab13edd0b06ce6f996c5fd450d7efabb2e8","versionType":"git"},{"version":"eec40579d84873dfb7021eb24c50360f073237c5","status":"affected","lessThan":"889374b8e4a60d13fe4a5a8ae3a311ca93d1a2c3","versionType":"git"},{"version":"eec40579d84873dfb7021eb24c50360f073237c5","status":"affected","lessThan":"01c49eae7c6256f2d8cc08210a2bac3ee070e43a","versionType":"git"},{"version":"eec40579d84873dfb7021eb24c50360f073237c5","status":"affected","lessThan":"14e03ecd3b1b5fc03c082b27a2f8889f8290c30e","versionType":"git"},{"version":"eec40579d84873dfb7021eb24c50360f073237c5","status":"affected","lessThan":"b69ea153d30ce19ca8997eeeca1e2219fae5a29b","versionType":"git"},{"version":"eec40579d84873dfb7021eb24c50360f073237c5","status":"affected","lessThan":"9ae672606c17891d90b282e3490b817620549599","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/dm-era-target.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.15","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/dm-era-target.c"]}],"references":["https://git.kernel.org/stable/c/a705e056c2f3dd067fb2ff414f0537530baa090b","https://git.kernel.org/stable/c/bd5a80128bdfc93b1cae935a70da000b8c483e6e","https://git.kernel.org/stable/c/17eb2ab13edd0b06ce6f996c5fd450d7efabb2e8","https://git.kernel.org/stable/c/889374b8e4a60d13fe4a5a8ae3a311ca93d1a2c3","https://git.kernel.org/stable/c/01c49eae7c6256f2d8cc08210a2bac3ee070e43a","https://git.kernel.org/stable/c/14e03ecd3b1b5fc03c082b27a2f8889f8290c30e","https://git.kernel.org/stable/c/b69ea153d30ce19ca8997eeeca1e2219fae5a29b","https://git.kernel.org/stable/c/9ae672606c17891d90b282e3490b817620549599"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/72xxx/CVE-2026-72316.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-72316","state":"PUBLISHED","datePublished":"2026-08-15T05:55:30.399Z","dateUpdated":"2026-08-17T05:12:21.813Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-09T03:40:39.919Z"},"containers":{"cna":{"title":"dm era: fix NULL pointer dereference in metadata_open()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndm era: fix NULL pointer dereference in metadata_open()\n\nmetadata_open() returns NULL when kzalloc_obj() fails, but the\ncaller era_ctr() only checks IS_ERR(md).  Since IS_ERR(NULL)\nreturns false, the NULL pointer is treated as a valid result\nand later assigned to era->md, leading to a NULL pointer\ndereference when the metadata is accessed.\n\nFix this by returning ERR_PTR(-ENOMEM) on allocation failure,\nconsistent with dm-cache-metadata.c, dm-thin-metadata.c, and\ndm-clone-metadata.c which all use ERR_PTR(-ENOMEM) for the\nsame pattern."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"eec40579d84873dfb7021eb24c50360f073237c5","status":"affected","lessThan":"a705e056c2f3dd067fb2ff414f0537530baa090b","versionType":"git"},{"version":"eec40579d84873dfb7021eb24c50360f073237c5","status":"affected","lessThan":"bd5a80128bdfc93b1cae935a70da000b8c483e6e","versionType":"git"},{"version":"eec40579d84873dfb7021eb24c50360f073237c5","status":"affected","lessThan":"17eb2ab13edd0b06ce6f996c5fd450d7efabb2e8","versionType":"git"},{"version":"eec40579d84873dfb7021eb24c50360f073237c5","status":"affected","lessThan":"889374b8e4a60d13fe4a5a8ae3a311ca93d1a2c3","versionType":"git"},{"version":"eec40579d84873dfb7021eb24c50360f073237c5","status":"affected","lessThan":"01c49eae7c6256f2d8cc08210a2bac3ee070e43a","versionType":"git"},{"version":"eec40579d84873dfb7021eb24c50360f073237c5","status":"affected","lessThan":"14e03ecd3b1b5fc03c082b27a2f8889f8290c30e","versionType":"git"},{"version":"eec40579d84873dfb7021eb24c50360f073237c5","status":"affected","lessThan":"b69ea153d30ce19ca8997eeeca1e2219fae5a29b","versionType":"git"},{"version":"eec40579d84873dfb7021eb24c50360f073237c5","status":"affected","lessThan":"9ae672606c17891d90b282e3490b817620549599","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/dm-era-target.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.15","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/dm-era-target.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/a705e056c2f3dd067fb2ff414f0537530baa090b"},{"url":"https://git.kernel.org/stable/c/bd5a80128bdfc93b1cae935a70da000b8c483e6e"},{"url":"https://git.kernel.org/stable/c/17eb2ab13edd0b06ce6f996c5fd450d7efabb2e8"},{"url":"https://git.kernel.org/stable/c/889374b8e4a60d13fe4a5a8ae3a311ca93d1a2c3"},{"url":"https://git.kernel.org/stable/c/01c49eae7c6256f2d8cc08210a2bac3ee070e43a"},{"url":"https://git.kernel.org/stable/c/14e03ecd3b1b5fc03c082b27a2f8889f8290c30e"},{"url":"https://git.kernel.org/stable/c/b69ea153d30ce19ca8997eeeca1e2219fae5a29b"},{"url":"https://git.kernel.org/stable/c/9ae672606c17891d90b282e3490b817620549599"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T05:12:21.813Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.15","versionEndExcluding":"5.10.261"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.15","versionEndExcluding":"5.15.212"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.15","versionEndExcluding":"6.1.178"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.15","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.15","versionEndExcluding":"6.12.97"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.15","versionEndExcluding":"6.18.40"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.15","versionEndExcluding":"7.1.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.15","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}