CVE-2026-72316

Summary

In the Linux kernel, the following vulnerability has been resolved:

dm era: fix NULL pointer dereference in metadata_open()

metadata_open() returns NULL when kzalloc_obj() fails, but the caller era_ctr() only checks IS_ERR(md). Since IS_ERR(NULL) returns false, the NULL pointer is treated as a valid result and later assigned to era->md, leading to a NULL pointer dereference when the metadata is accessed.

Fix this by returning ERR_PTR(-ENOMEM) on allocation failure, consistent with dm-cache-metadata.c, dm-thin-metadata.c, and dm-clone-metadata.c which all use ERR_PTR(-ENOMEM) for the same pattern.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxeec40579d84873dfb7021eb24c50360f073237c5 < a705e056c2f3dd067fb2ff414f0537530baa090baffected
LinuxLinuxeec40579d84873dfb7021eb24c50360f073237c5 < bd5a80128bdfc93b1cae935a70da000b8c483e6eaffected
LinuxLinuxeec40579d84873dfb7021eb24c50360f073237c5 < 17eb2ab13edd0b06ce6f996c5fd450d7efabb2e8affected
LinuxLinuxeec40579d84873dfb7021eb24c50360f073237c5 < 889374b8e4a60d13fe4a5a8ae3a311ca93d1a2c3affected
LinuxLinuxeec40579d84873dfb7021eb24c50360f073237c5 < 01c49eae7c6256f2d8cc08210a2bac3ee070e43aaffected
LinuxLinuxeec40579d84873dfb7021eb24c50360f073237c5 < 14e03ecd3b1b5fc03c082b27a2f8889f8290c30eaffected
LinuxLinuxeec40579d84873dfb7021eb24c50360f073237c5 < b69ea153d30ce19ca8997eeeca1e2219fae5a29baffected
LinuxLinuxeec40579d84873dfb7021eb24c50360f073237c5 < 9ae672606c17891d90b282e3490b817620549599affected
LinuxLinux3.15affected
LinuxLinux0 < 3.15unaffected
LinuxLinux5.10.261 <= 5.10.*unaffected
LinuxLinux5.15.212 <= 5.15.*unaffected
LinuxLinux6.1.178 <= 6.1.*unaffected
LinuxLinux6.6.145 <= 6.6.*unaffected
LinuxLinux6.12.97 <= 6.12.*unaffected
LinuxLinux6.18.40 <= 6.18.*unaffected
LinuxLinux7.1.5 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References