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().
Fix
Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.
Change history 2
- StatusReceived → PublishedNVD modified 2026-10-19 08:49
- First seenunscoredNVD modified 2026-10-19 09:17
Affected (CPE criteria) 0
NVD has not attached CPE configurations yet.
References 8
- 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