CVE-2026-89576dm-era: fix shadowed superblock leak on take-snap failure
- —Not scoredno CVSS score yet
- 0.22%Exploitation in 30 daysEPSS · top 88% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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().
Timeline
ID reserved
By Linux
Published
- 38 days later
· 38 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.22% · top 88% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected eec40579d84873dfb7021eb24c50360f073237c5 – < 54dd21ca945ecc07885012b9f3e8197f091cfba0
- affected eec40579d84873dfb7021eb24c50360f073237c5 – < ef00efb6fcaee88f50891279ceced17c614e97f7
- affected eec40579d84873dfb7021eb24c50360f073237c5 – < e9fa68b89214bc65af0ef963af7ec3cce9f866e0
- affected eec40579d84873dfb7021eb24c50360f073237c5 – < dc731d7fddfd6149f5e88ea080475d18c36d3c64
- affected eec40579d84873dfb7021eb24c50360f073237c5 – < d66ceeefb87ddb097b0546bafc581380b816b048
- affected eec40579d84873dfb7021eb24c50360f073237c5 – < 36ff918637e3517f732188a3c39dbeae5b9cfb1b
- affected eec40579d84873dfb7021eb24c50360f073237c5 – < 6876ca330e741fb8886d12070cb6a7f9cb67257e
- affected eec40579d84873dfb7021eb24c50360f073237c5 – < 39c5aa3bd8ec3912d2cd0b3fe092642b0d2b0713
- affected 3.15
- unaffected < 3.15
- unaffected 5.10.270 – ≤ 5.10.*
- unaffected 5.15.221 – ≤ 5.15.*
- unaffected 6.1.188 – ≤ 6.1.*
- unaffected 6.6.157 – ≤ 6.6.*
- unaffected 6.12.109 – ≤ 6.12.*
- unaffected 6.18.50 – ≤ 6.18.*
- unaffected 7.2.4 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References8
- https://git.kernel.org/stable/c/54dd21ca945ecc07885012b9f3e8197f091cfba0 (opens in a new tab)
- https://git.kernel.org/stable/c/ef00efb6fcaee88f50891279ceced17c614e97f7 (opens in a new tab)
- https://git.kernel.org/stable/c/e9fa68b89214bc65af0ef963af7ec3cce9f866e0 (opens in a new tab)
- https://git.kernel.org/stable/c/dc731d7fddfd6149f5e88ea080475d18c36d3c64 (opens in a new tab)
- https://git.kernel.org/stable/c/d66ceeefb87ddb097b0546bafc581380b816b048 (opens in a new tab)
- https://git.kernel.org/stable/c/36ff918637e3517f732188a3c39dbeae5b9cfb1b (opens in a new tab)
- https://git.kernel.org/stable/c/6876ca330e741fb8886d12070cb6a7f9cb67257e (opens in a new tab)
- https://git.kernel.org/stable/c/39c5aa3bd8ec3912d2cd0b3fe092642b0d2b0713 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-76488 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-89576)Record last updated .