dm era: fix NULL pointer dereference in metadata_open()
Summary
| CVE | CVE-2026-72316 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-15 06:22:04 UTC |
| Updated | 2026-08-17 06:18:34 UTC |
| Description | 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. |
Risk And Classification
EPSS: 0.002200000 probability, percentile 0.127050000 (date 2026-08-17)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected eec40579d84873dfb7021eb24c50360f073237c5 a705e056c2f3dd067fb2ff414f0537530baa090b git | Not specified |
| CNA | Linux | Linux | affected eec40579d84873dfb7021eb24c50360f073237c5 bd5a80128bdfc93b1cae935a70da000b8c483e6e git | Not specified |
| CNA | Linux | Linux | affected eec40579d84873dfb7021eb24c50360f073237c5 17eb2ab13edd0b06ce6f996c5fd450d7efabb2e8 git | Not specified |
| CNA | Linux | Linux | affected eec40579d84873dfb7021eb24c50360f073237c5 889374b8e4a60d13fe4a5a8ae3a311ca93d1a2c3 git | Not specified |
| CNA | Linux | Linux | affected eec40579d84873dfb7021eb24c50360f073237c5 01c49eae7c6256f2d8cc08210a2bac3ee070e43a git | Not specified |
| CNA | Linux | Linux | affected eec40579d84873dfb7021eb24c50360f073237c5 14e03ecd3b1b5fc03c082b27a2f8889f8290c30e git | Not specified |
| CNA | Linux | Linux | affected eec40579d84873dfb7021eb24c50360f073237c5 b69ea153d30ce19ca8997eeeca1e2219fae5a29b git | Not specified |
| CNA | Linux | Linux | affected eec40579d84873dfb7021eb24c50360f073237c5 9ae672606c17891d90b282e3490b817620549599 git | Not specified |
| CNA | Linux | Linux | affected 3.15 | Not specified |
| CNA | Linux | Linux | unaffected 3.15 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.261 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.212 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.178 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.145 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.97 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.40 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1.5 7.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/889374b8e4a60d13fe4a5a8ae3a311ca93d1a2c3 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/b69ea153d30ce19ca8997eeeca1e2219fae5a29b | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/9ae672606c17891d90b282e3490b817620549599 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/bd5a80128bdfc93b1cae935a70da000b8c483e6e | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/01c49eae7c6256f2d8cc08210a2bac3ee070e43a | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/14e03ecd3b1b5fc03c082b27a2f8889f8290c30e | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/a705e056c2f3dd067fb2ff414f0537530baa090b | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/17eb2ab13edd0b06ce6f996c5fd450d7efabb2e8 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.