CVE-2026-63125

CRITICALPre-NVD 9.99.9—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.9 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.7% (50th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
9.9EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.7%CVSS: 9.9Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Incus is a system container and virtual machine manager. Prior to version 7.3.0, an unprivileged, project-confined Incus user (a non-admin TLS/RBAC identity with can_create_images and can_create_instances) can execute arbitrary code as root on the host. A crafted image ships backup.yaml as a symlink to a host file. When the root daemon writes the instance's backup file, it follows the symlink. Version 7.3.0 patches the issue.

CVSS v3
9.9
EG Score
9.9CRITICALmedium confidence
EG Risk
49
EG Risk 49/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity99% × 45%
Exploitation1% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track* or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.7%
EPSS %ILE
50th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact total (CVSS ≥ 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 21, 2026

Last Modified

September 18, 2026

Advisory Details (1)

Auto-updated Oct 9, 2026
🔬 Proof of concept available. Patch available. Sources: github.
githubMentions a patch (unverified)🟡 PoC Available

Arbitrary file write on host via backup.yaml symlink in crafted image · Advisory · lxc/incus · GitHub

https://github.com/lxc/incus/security/advisories/GHSA-6rqx-22hc-qm36

Affected Packages

(2 across 2 ecosystems)
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
incus6.0.4-2 ... 6.0.4-2+deb13u8 (16 versions)
  • every version up to 6.0.4-2+deb13u9: fixed in 6.0.4-2+deb13u9
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
incus6.0.4-2 ... 7.0.1-2~bpo13+1 (32 versions)
  • every version up to 7.0.1-2: fixed in 7.0.1-2
—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 13× in last 7d / 48× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-10-09 20:07 UTCEPSS rescore
  2. 2026-10-09 05:56 UTCEG score recompute
  3. 2026-10-08 17:13 UTCEPSS rescore
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  25. 2026-09-26 15:59 UTCEPSS rescore
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  1. 2026-09-24 14:41 UTCEG score recompute
  2. 2026-09-23 21:07 UTCEG score recompute
  3. 2026-09-23 17:54 UTCEPSS rescore
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  7. 2026-09-20 20:16 UTCEPSS rescore
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  20. 2026-09-11 14:53 UTCEPSS rescore
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  24. 2026-09-09 01:47 UTCEG score recompute
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  35. 2026-09-01 15:38 UTCEG score recompute
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  39. 2026-08-30 19:34 UTCEG score recompute
  40. 2026-08-30 19:17 UTCEPSS rescore
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  43. 2026-08-29 01:07 UTCEG score recompute
  44. 2026-08-28 21:42 UTCEPSS rescore
  45. 2026-08-27 15:40 UTCEG score recompute
  46. 2026-08-27 14:25 UTCEPSS rescore
  47. 2026-08-26 18:26 UTCEG score recompute
  48. 2026-08-26 14:46 UTCEPSS rescore
  49. 2026-08-25 16:58 UTCEG score recompute
  50. 2026-08-25 13:49 UTCEPSS rescore
  51. 2026-08-24 15:17 UTCEG score recompute
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  55. 2026-08-21 15:21 UTCEG score recompute
  56. 2026-08-21 14:54 UTCEG score recompute
  57. 2026-08-21 14:54 UTCMITRE cvelistV5first tracked

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-63125?
CVE-2026-63125 is a critical vulnerability published on August 21, 2026. Incus is a system container and virtual machine manager. Prior to version 7.3.0, an unprivileged, project-confined Incus user (a non-admin TLS/RBAC identity with cancreateimages and cancreateinstances) can execute arbitrary code as root on the host. A crafted image ships backup.yaml as a symlink to…
When was CVE-2026-63125 disclosed?
CVE-2026-63125 was first published on August 21, 2026, with the most recent update on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-63125 actively exploited?
CVE-2026-63125 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (50th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-63125?
CVE-2026-63125 has a CVSS base score of 9.9 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-63125?
A fix for CVE-2026-63125 is available: update to the fixed version the vendor names in its advisory.

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