CVE intelligence

CVE-2026-89576

Vulnerability intelligence

Published Sep 11, 2026Sources checked Nov 3, 2026

N/ACVSS not listedScore unavailable

What this means

Review the available evidence

CVE-2026-89576. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

CISA KEVNot listedBased on the latest collected catalog

EPSS0.2%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-89576?

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: NVD