CVE-2026-89576

CVE-2026-89576: vulnerability in Linux

dm-era: fix shadowed superblock leak on take-snap failure

Published · Updated

3Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackepss 0.2%
exploitation probability
0.2%top 89% of all CVEs
observed exploitation
nono source reports it
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().
Affected products
Linux · Linux
Related CVEs — Linux

In the same product, most dangerous first.

CVE-2024-53197HIGHALSA: usb-audio: Fix potential out-of-bound accesses for Extigy and Mbox devicesEPSS 4.1%KEVCVE-2026-31431HIGHcrypto: algif_aead - Revert to operating out-of-placeEPSS 3.4%KEVCVE-2024-53104HIGHmedia: uvcvideo: Skip parsing frames of type UVC_VS_UNDEFINED in uvc_parse_formatEPSS 3.4%KEVCVE-2025-39682CRITICALtls: fix handling of zero-length records on the rx_listEPSS 2.9%KEVCVE-2024-36971HIGHnet: fix __dst_negative_advice() raceEPSS 2.7%KEVCVE-2024-53150HIGHALSA: usb-audio: Fix out of bounds reads when finding clock sourcesEPSS 1.4%KEV
References
https://git.kernel.org/stable/c/36ff918637e3517f732188a3c39dbeae5b9cfb1bhttps://git.kernel.org/stable/c/39c5aa3bd8ec3912d2cd0b3fe092642b0d2b0713https://git.kernel.org/stable/c/54dd21ca945ecc07885012b9f3e8197f091cfba0https://git.kernel.org/stable/c/6876ca330e741fb8886d12070cb6a7f9cb67257ehttps://git.kernel.org/stable/c/d66ceeefb87ddb097b0546bafc581380b816b048https://git.kernel.org/stable/c/dc731d7fddfd6149f5e88ea080475d18c36d3c64https://git.kernel.org/stable/c/e9fa68b89214bc65af0ef963af7ec3cce9f866e0https://git.kernel.org/stable/c/ef00efb6fcaee88f50891279ceced17c614e97f7