CVE-2026-89576

CVE CVE-2026-89576EUVD EUVD-2026-76488Published 2026-09-11T19:44:43.000ZLast changed 2026-09-14T12:01:08.000Z

What the advisory describes

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().

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 6.18.50; patch: 5.10.270; eec40579d84873dfb7021eb24c50360f073237c5 <36ff918637e3517f732188a3c39dbeae5b9cfb1b; eec40579d84873dfb7021eb24c50360f073237c5 <e9fa68b89214bc65af0ef963af7ec3cce9f866e0; eec40579d84873dfb7021eb24c50360f073237c5 <39c5aa3bd8ec3912d2cd0b3fe092642b0d2b0713; patch: 0; 3.15; patch: 6.1.188; patch: 5.15.221; patch: 7.3-rc1; eec40579d84873dfb7021eb24c50360f073237c5 <d66ceeefb87ddb097b0546bafc581380b816b048; eec40579d84873dfb7021eb24c50360f073237c5 <dc731d7fddfd6149f5e88ea080475d18c36d3c64; patch: 7.2.4; eec40579d84873dfb7021eb24c50360f073237c5 <ef00efb6fcaee88f50891279ceced17c614e97f7; eec40579d84873dfb7021eb24c50360f073237c5 <54dd21ca945ecc07885012b9f3e8197f091cfba0; patch: 6.12.109; eec40579d84873dfb7021eb24c50360f073237c5 <6876ca330e741fb8886d12070cb6a7f9cb67257e; patch: 6.6.157

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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