CVE Intelligence
Unknown

CVE-2026-89575 — dm raid1: reserve space for NUL-terminator in build_constructor_string()

In the Linux kernel, the following vulnerability has been resolved: dm raid1: reserve space for NUL-terminator in build_constructor_string() Reserve space for the termination NUL after the maximum 20 decimal digits of a long long value to avoid buffer overflow in sprintf().

Published Sep 11, 2026 · Updated Oct 19, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP, GitHub Security Advisories · CNA: Linux

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.
How the score was calculated
  • EPSS 0.2% (30-day exploitation probability)+2

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation
Not confirmed
Not in CISA KEV — an absence of record, not proof it is unexploited.
EPSS FIRST
0.23%
ahead of 13% of scored CVEs · Oct 22, 2026
Affects
Linux
Linux
CVSS base
—
Score not published yet.

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

  1. Identify exposed assets running the affected vendor/product/version combinations (Linux Linux).
  2. No fix documented in the sources: reduce exposure and monitor the vendor advisory.
  3. Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

VendorProductVersionsStatusSource
Linux Linux ≥ f5db4af466e2dca0fe822019812d586ca910b00c and < 35ba81c93fe7392c973af9881640180490e76f34≥ f5db4af466e2dca0fe822019812d586ca910b00c and < 1fcc9f9f35653c5ee1a8b144ec96ff3fc48532f7≥ f5db4af466e2dca0fe822019812d586ca910b00c and < 7b035983b895db3ae01d9855963d42541db42125≥ f5db4af466e2dca0fe822019812d586ca910b00c and < 01a0276706c7b6fb758a8e2ff9cf221a3dfcae97≥ f5db4af466e2dca0fe822019812d586ca910b00c and < 0a3657ebd6b517b60cdc5123894047616974e25b≥ f5db4af466e2dca0fe822019812d586ca910b00c and < 644140527ae494cedf3b5c0ecd16287deaea7a66≥ f5db4af466e2dca0fe822019812d586ca910b00c and < f79b53ca3a68a46c6fc3b30b148d1dfb1b33ea8b≥ f5db4af466e2dca0fe822019812d586ca910b00c and < 73c37fe54cd056d07461b142ab0b8b81e1ef6ad8
and 1 more version 2.6.31
Vulnerable CVE Program (cve.org) e CISA ADP

EPSS over time FIRST

Oct 15, 2026 → Oct 22, 2026 · 7 reading(s) · max 0.23%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

  • Not enough vector or weakness data: use the affected application’s logs as a starting point.
application logs

Timeline

What happened to this CVE, newest first.

  • 2026
  • Record published
    Oct 15, 2026
  • Affected products added · linux/linux
    Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
  • Source status changed · → Received
    Oct 15, 2026 · NIST National Vulnerability Database
  • Record created in this database
    Oct 15, 2026 · NIST National Vulnerability Database
  • CVE published
    Sep 11, 2026 · Linux

Source activity

Repeated readings are counted rather than listed.

  • 1× References added · Oct 19, 2026 – Oct 19, 2026
  • 1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

10 on the record

Elsewhere on this site

Linux
every CVE for this vendor

Related CVEs (same products)

  • CVE-2026-99087 dm-integrity: fix NULL pointer dereference when the 'R' flag is used 49m
  • CVE-2026-99086 dm-integrity: validate the superblock on resume 49m
  • CVE-2026-99085 sched_ext: Fix CPU hotplug hang when a dying CPU's tasks sit in the BPF scheduler 50m
  • CVE-2026-99084 readdir: take no inode lock on an immutable directory 50m
  • CVE-2026-99083 ksmbd: fix heap out-of-bounds write in krb5_authenticate() 50m
  • CVE-2026-99082 KVM: x86: Use active memslots for the per-vCPU MMIO cache 50m

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

  • No CVSS score published by NVD, the CNA, CISA or GitHub so far.
  • No fixed version, patch or mitigation documented.
  • No CISA SSVC assessment.
  • No CWE classification.
  • No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
  • No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
  • No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-89575 is "dm raid1: reserve space for NUL-terminator in build_constructor_string()", rated Unknown. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. EPSS 0.23% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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