Description
In the Linux kernel, the following vulnerability has been resolved:
dm-era: fix shadowed superblock leak on take-snap failure
metadata_take_snap() bumps the live superblock refcount and then dm_tm_shadow_block() allocates a new block for the metadata snapshot. If the subsequent dm_sm_inc_block() of writeset_tree_root or era_array_root fails, the function only unlocks the clone and returns. The newly allocated shadow block is never returned to the metadata space map, so each failed take-snap permanently leaks one metadata block.
Free the clone with dm_sm_dec_block() on those error paths, matching the final step of metadata_drop_snap().
Metrics
No CVSS score has been published yet.
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= eec40579d84873dfb7021eb24c50360f073237c5, < 54dd21ca945ecc07885012b9f3e8197f091cfba0; >= eec40579d84873dfb7021eb24c50360f073237c5, < ef00efb6fcaee88f50891279ceced17c614e97f7; >= eec40579d84873dfb7021eb24c50360f073237c5, < e9fa68b89214bc65af0ef963af7ec3cce9f866e0; >= eec40579d84873dfb7021eb24c50360f073237c5, < dc731d7fddfd6149f5e88ea080475d18c36d3c64; >= eec40579d84873dfb7021eb24c50360f073237c5, < d66ceeefb87ddb097b0546bafc581380b816b048; >= eec40579d84873dfb7021eb24c50360f073237c5, < 36ff918637e3517f732188a3c39dbeae5b9cfb1b; >= eec40579d84873dfb7021eb24c50360f073237c5, < 6876ca330e741fb8886d12070cb6a7f9cb67257e; >= eec40579d84873dfb7021eb24c50360f073237c5, < 39c5aa3bd8ec3912d2cd0b3fe092642b0d2b0713 |
| Linux | Linux | 3.15 |
References
- https://git.kernel.org/stable/c/36ff918637e3517f732188a3c39dbeae5b9cfb1b
- https://git.kernel.org/stable/c/39c5aa3bd8ec3912d2cd0b3fe092642b0d2b0713
- https://git.kernel.org/stable/c/54dd21ca945ecc07885012b9f3e8197f091cfba0
- https://git.kernel.org/stable/c/6876ca330e741fb8886d12070cb6a7f9cb67257e
- https://git.kernel.org/stable/c/d66ceeefb87ddb097b0546bafc581380b816b048
- https://git.kernel.org/stable/c/dc731d7fddfd6149f5e88ea080475d18c36d3c64
- https://git.kernel.org/stable/c/e9fa68b89214bc65af0ef963af7ec3cce9f866e0
- https://git.kernel.org/stable/c/ef00efb6fcaee88f50891279ceced17c614e97f7
Timeline
- Published
- Sep 11, 2026
- Last modified
- Oct 19, 2026
- NVD status
- Received