{"id":"CVE-2026-72316","title":"dm era: fix NULL pointer dereference in metadata_open()","summary":"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 …","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= eec40579d84873dfb7021eb24c50360f073237c5 < a705e056c2f3dd067fb2ff414f0537530baa090b","Linux >= eec40579d84873dfb7021eb24c50360f073237c5 < bd5a80128bdfc93b1cae935a70da000b8c483e6e","Linux >= eec40579d84873dfb7021eb24c50360f073237c5 < 17eb2ab13edd0b06ce6f996c5fd450d7efabb2e8","Linux >= eec40579d84873dfb7021eb24c50360f073237c5 < 889374b8e4a60d13fe4a5a8ae3a311ca93d1a2c3","Linux >= eec40579d84873dfb7021eb24c50360f073237c5 < 01c49eae7c6256f2d8cc08210a2bac3ee070e43a","Linux >= eec40579d84873dfb7021eb24c50360f073237c5 < 14e03ecd3b1b5fc03c082b27a2f8889f8290c30e","Linux >= eec40579d84873dfb7021eb24c50360f073237c5 < b69ea153d30ce19ca8997eeeca1e2219fae5a29b","Linux >= eec40579d84873dfb7021eb24c50360f073237c5 < 9ae672606c17891d90b282e3490b817620549599","Linux 3.15"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-06T16:54:38.013413Z"},"published":"2026-08-15","updated":"2026-11-06","sourceUpdated":"2026-11-06T16:55:25.833Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-72316","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"}],"tags":["cve.org"],"epss":0.0022,"epssPercentile":0.12545,"ingestedAt":"2026-11-06T18:00:12.581Z","slug":"CVE-2026-72316","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= eec40579d84873dfb7021eb24c50360f073237c5 < a705e056c2f3dd067fb2ff414f0537530baa090b`\n- `Linux >= eec40579d84873dfb7021eb24c50360f073237c5 < bd5a80128bdfc93b1cae935a70da000b8c483e6e`\n- `Linux >= eec40579d84873dfb7021eb24c50360f073237c5 < 17eb2ab13edd0b06ce6f996c5fd450d7efabb2e8`\n- `Linux >= eec40579d84873dfb7021eb24c50360f073237c5 < 889374b8e4a60d13fe4a5a8ae3a311ca93d1a2c3`\n- `Linux >= eec40579d84873dfb7021eb24c50360f073237c5 < 01c49eae7c6256f2d8cc08210a2bac3ee070e43a`\n- `Linux >= eec40579d84873dfb7021eb24c50360f073237c5 < 14e03ecd3b1b5fc03c082b27a2f8889f8290c30e`\n- `Linux >= eec40579d84873dfb7021eb24c50360f073237c5 < b69ea153d30ce19ca8997eeeca1e2219fae5a29b`\n- `Linux >= eec40579d84873dfb7021eb24c50360f073237c5 < 9ae672606c17891d90b282e3490b817620549599`\n- `Linux 3.15`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}