CVE-2026-33179

MEDIUMPre-NVD 5.55.5
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 5.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2% (9th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source

Also known asEUVD-2026-13794 (ENISA EUVD)Source: ENISA EUVD

5.5EG
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: 0.2%CVSS: 5.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

libfuse is the reference implementation of the Linux FUSE. From version 3.18.0 to before version 3.18.2, a NULL pointer dereference and memory leak in fuse_uring_init_queue allows a local user to crash the FUSE daemon or cause resource exhaustion. When numa_alloc_local fails during io_uring queue entry setup, the code proceeds with NULL pointers. When fuse_uring_register_queue fails, NUMA allocations are leaked and the function incorrectly returns success. Only the io_uring transport is affected; the traditional /dev/fuse path is not affected. PoC confirmed with AddressSanitizer/LeakSanitizer. This issue has been patched in version 3.18.2.

CVSS v3
5.5
EG Score
5.5MEDIUMmedium confidence
EG Risk
25
EG Risk 25/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity55% × 45%
Impact severity (EG Severity): CVSS 5.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.2% × 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
0.2%
EPSS %ILE
9th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (5.5): severity, escalated by confirmed exploitation. This CVE's 5.5 is its impact severity (EG Severity), not escalated.

EG Severity
5.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS. FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

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.

The score's inputs: 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

March 20, 2026

Last Modified

June 17, 2026

Advisory Details (3)

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

NULL Pointer Dereference and Memory Leak in io_uring Queue Initialization · Advisory · libfuse/libfuse · GitHub

https://github.com/libfuse/libfuse/security/advisories/GHSA-x669-v3mq-r358
GitHub release Patch Available

fuse-3.18.2

Patch available: libfuse/libfuse fuse-3.18.2

https://github.com/libfuse/libfuse/releases/tag/fuse-3.18.2
GitHub commit Patch Available

commit 7beb86c09b6e (libfuse/libfuse)

Patch available: libfuse/libfuse fuse-3.18.2 (contains commit 7beb86c09b6e)

https://github.com/libfuse/libfuse/commit/7beb86c09b6ec5aab14dc25256ed8a5ad18554d7

Affected Packages

(1 across 1 ecosystem)
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
fuse33.17.2-3, 3.17.3-1, 3.17.4-1, 3.18.1-1
  • every version up to 3.18.2-1: fixed in 3.18.2-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 37× 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 97 of 102 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. 3 repeat rows among the latest 100 are merged into the row they repeat. The 5 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  2. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  3. 2026-10-30 21:25 UTCOSV refresh
  4. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  5. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  6. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  7. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  8. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  9. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  10. 2026-10-25 14:35 UTCEG score recompute
  11. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  12. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  13. 2026-10-23 03:32 UTCEG score recompute
  14. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  15. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  16. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  17. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  18. 2026-10-18 03:47 UTCEG score recompute
  19. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  20. 2026-10-16 16:41 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  21. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  22. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  23. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  24. 2026-10-12 16:13 UTCEG score recompute
  25. 2026-10-11 19:55 UTCEG score recompute
Show 72 more
  1. 2026-10-11 17:09 UTCEG score recompute
  2. 2026-10-11 14:36 UTCEG score recompute
  3. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  4. 2026-10-11 07:25 UTCOSV refresh
  5. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  6. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  7. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  8. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  9. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  10. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  11. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  12. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  13. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  14. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  15. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  16. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  17. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  18. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  19. 2026-09-21 20:18 UTCOSV refresh
  20. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  21. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  22. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  23. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  24. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  25. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  26. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  27. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  28. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  29. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  30. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  31. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  32. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  33. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  34. 2026-09-02 16:38 UTCOSV refresh
  35. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  36. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  37. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  38. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  39. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  40. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  41. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  42. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  43. 2026-08-24 14:17 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  44. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  45. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  46. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  47. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  48. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  49. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  50. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  51. 2026-08-16 10:59 UTCEG score recompute
  52. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  53. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  54. 2026-08-14 07:10 UTCEG score recompute
  55. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  56. 2026-08-12 21:50 UTCEG score recompute
  57. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  58. 2026-08-11 08:54 UTCEG score recompute
  59. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  60. 2026-08-10 07:49 UTCEG score recompute
  61. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  62. 2026-08-09 06:44 UTCEG score recompute
  63. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  64. 2026-08-07 17:13 UTCEG score recompute
  65. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  66. 2026-08-06 01:26 UTCEG score recompute
  67. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  68. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  69. 2026-08-04 10:38 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  70. 2026-08-04 00:34 UTCEG score recompute
  71. 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  72. 2026-08-02 16:09 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-33179?
CVE-2026-33179 is a medium-severity vulnerability; its CVE record was published on March 20, 2026. libfuse is the reference implementation of the Linux FUSE. From version 3.18.0 to before version 3.18.2, a NULL pointer dereference and memory leak in fuse_uring_init_queue allows a local user to crash the FUSE daemon or cause resource exhaustion. When numa_alloc_local fails during io_uring queue…
When was the CVE record for CVE-2026-33179 published?
The CVE record for CVE-2026-33179 was published on March 20, 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 June 17, 2026; the record at its source may have been updated since.
Is CVE-2026-33179 actively exploited?
CVE-2026-33179 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (9th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-33179?
CVE-2026-33179 has a CVSS base score of 5.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-33179?
A fix for CVE-2026-33179 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

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