CVE-2026-40197

MEDIUMNVD 6.56.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

This medium-severity CVE scores 6.5 under NVD CVSS v3. EPSS exploit probability: 0.4% (36th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3
6.5EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 6.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Incus is a system container and virtual machine manager. In versions before 7.0.0, missing validation logic in the storage volume import logic allows an authenticated user with access to the storage volume feature to cause the Incus daemon to crash. The custom volume backup import subsystem contains a nil-pointer dereference vulnerability during import operations. In the snapshot import loop, the daemon iterates over entries from srcBackup.Config.VolumeSnapshots and assumes that each slice element is initialized, then dereferences fields such as Name, Config, Description, CreatedAt, and ExpiresAt without first validating the element itself. Because the yaml unmarshaler accepts explicit null array elements from an attacker-controlled index.yaml and converts them into nil pointers inside the slice, an attacker can supply a backup archive containing a null entry in the volume_snapshots array. This causes a nil-pointer dereference during custom volume import and terminates the daemon, resulting in denial of service on the affected node. Repeated use of this issue can be used to keep Incus offline, causing a denial of service. This issue is fixed in version 7.0.0.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
29
EG Risk 29/100

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 (value × EchelonGraph’s weight)
Severity65% × 45%
The EG Score, 6.5 of 10.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
36th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

May 6, 2026

Last Modified

May 7, 2026

Advisory Details (1)

Auto-updated May 6, 2026
Patch available. Sources: github.
GitHub advisoryMentions a patch (unverified)

Nil-Pointer Dereference via Custom Volume Import · Advisory · lxc/incus · GitHub

https://github.com/lxc/incus/security/advisories/GHSA-r7w7-mmxr-47r9

Affected Packages

(8 across 4 ecosystems)
Go(4)
PackageVulnerable rangeFix by version rangeDependents
github.com/lxc/incus—
  • every version on: no fix on record
—
github.com/lxc/incus/v6—
  • every version on: no fix on record
—
github.com/lxc/incus/v6/cmd/incusd—
  • every version up to 7.0.0: fixed in 7.0.0
—
github.com/lxc/incus/v7—
  • every version up to 7.0.0: fixed in 7.0.0
—
Debian:13(2)
PackageVulnerable rangeFix by version rangeDependents
incus6.0.4-2 ... 6.0.4-2+deb13u7~bpo12+1 (14 versions)
  • every version up to 6.0.4-2+deb13u7: fixed in 6.0.4-2+deb13u7
—
lxd5.0.2+git20231211.1364ae4-9 ... 5.0.2+git20231211.1364ae4-9+deb13u5 (6 versions)
  • every version up to 5.0.2+git20231211.1364ae4-9+deb13u6: fixed in 5.0.2+git20231211.1364ae4-9+deb13u6
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
lxd5.0.2+git20231211.1364ae4-1 ... 5.0.2-6 (17 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
incus6.0.4-2 ... 7.0.0-1~bpo13+1 (22 versions)
  • every version up to 7.0.0-1: fixed in 7.0.0-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 27× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 95 of 180 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 5 repeat rows among the latest 100 are merged into the row they repeat. The 85 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  3. 2026-10-12 16:09 UTCEG score recompute
  4. 2026-10-11 19:52 UTCEG score recompute
  5. 2026-10-11 17:05 UTCEG score recompute
  6. 2026-10-11 14:31 UTCEG score recompute
  7. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  10. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  11. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  12. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  13. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  14. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  15. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  16. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  17. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  18. 2026-09-30 08:41 UTCOSV refresh
  19. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  20. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  21. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  22. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  23. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  24. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  25. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
Show 70 more
  1. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  2. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  3. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  4. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  5. 2026-09-11 15:23 UTCOSV refresh
  6. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  7. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  8. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  9. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  10. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  11. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  12. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  13. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  14. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  15. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  16. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  17. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  18. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  19. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  20. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  21. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  22. 2026-08-23 19:43 UTCEG score recompute
  23. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  24. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  25. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  26. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  27. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  28. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  29. 2026-08-17 12:49 UTCEG score recompute
  30. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  31. 2026-08-16 04:47 UTCEG score recompute
  32. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  33. 2026-08-15 01:45 UTCEG score recompute
  34. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  35. 2026-08-14 03:21 UTCEG score recompute
  36. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  37. 2026-08-12 22:16 UTCEG score recompute
  38. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  39. 2026-08-11 23:51 UTCEG score recompute
  40. 2026-08-11 13:43 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  41. 2026-08-11 01:27 UTCEG score recompute
  42. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  43. 2026-08-10 00:55 UTCEG score recompute
  44. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  45. 2026-08-09 02:31 UTCEG score recompute
  46. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  47. 2026-08-07 19:07 UTCEG score recompute
  48. 2026-08-06 20:42 UTCEG score recompute
  49. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  50. 2026-08-05 22:16 UTCEG score recompute
  51. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  52. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  53. 2026-08-04 10:38 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  54. 2026-08-04 01:32 UTCEG score recompute
  55. 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  56. 2026-08-02 04:37 UTCEG score recompute
  57. 2026-08-02 02:27 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  58. 2026-08-01 15:06 UTCOSV refresh
  59. 2026-08-01 04:16 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  60. 2026-07-30 16:28 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  61. 2026-07-30 01:30 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  62. 2026-07-27 14:13 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  63. 2026-07-26 14:54 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  64. 2026-07-25 14:18 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  65. 2026-07-24 14:17 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  66. 2026-07-23 14:18 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  67. 2026-07-23 03:11 UTCEG score recompute
  68. 2026-07-22 14:08 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  69. 2026-07-21 15:24 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  70. 2026-07-20 17:08 UTCEPSS rescoreEPSS 0.3% · 21st percentile

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-40197?
CVE-2026-40197 is a medium-severity vulnerability; its CVE record was published on May 6, 2026. Incus is a system container and virtual machine manager. In versions before 7.0.0, missing validation logic in the storage volume import logic allows an authenticated user with access to the storage volume feature to cause the Incus daemon to crash. The custom volume backup import subsystem…
When was the CVE record for CVE-2026-40197 published?
The CVE record for CVE-2026-40197 was published on May 6, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of May 7, 2026; the record at its source may have been updated since.
Is CVE-2026-40197 actively exploited?
CVE-2026-40197 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (36th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-40197?
CVE-2026-40197 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-40197?
A fix for CVE-2026-40197 is available: update to the fixed version the vendor names in its advisory.

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