CVE-2013-4129

MEDIUMCVSS v2 · 4.74.7—
EchelonGraph scoreLOW confidence

This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 4.7 — v2 rates that MEDIUM (v2 bands: LOW 0.0–3.9 / MEDIUM 4.0–6.9 / HIGH 7.0–10.0; v2 has no CRITICAL band). Vector AV:L/AC:M/Au:N/C:N/I:N/A:C. CVSS v2 is an older, coarser metric than v3.1/v4.0 (no Scope, no User Interaction, no Attack Requirements), so it is not directly comparable to a v3 or v4 score. NVD has never re-scored this record under v3. EPSS predicts 0.5% exploitation probability in the next 30 days, which is reflected in EG Risk but does not lift the v2 base. Confidence: LOW.

Sources: epss, nvd_v2
4.7EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS v2: 4.7Exploit: None knownExposed services: Not assessed

A fix is referenced (a reference tagged "Patch", often a source commit), but no release containing it is confirmed — find the release that contains it; until it is applied, mitigate (WAF / firewall / segmentation).

The bridge multicast implementation in the Linux kernel through 3.10.3 does not check whether a certain timer is armed before modifying the timeout value of that timer, which allows local users to cause a denial of service (BUG and system crash) via vectors involving the shutdown of a KVM virtual machine, related to net/bridge/br_mdb.c and net/bridge/br_multicast.c.

CVSS v2.0 (legacy)
4.7MEDIUMNVD never assigned a CVSS v3 rating to this CVE
EG Score
4.7MEDIUMlow confidence
EG Risk
26
EG Risk 26/100CISA 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
Severity47% × 45%
Exploitation0% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Track* or Attend at high (mission-essential systems).
Action: A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it and apply that within your standard update timelines at low or medium mission impact and sooner than that at high; until then, restrict network exposure of the affected system or apply the vendor's mitigation.
EPSS PROB
0.5%
EPSS %ILE
37th
KEV
Not listed

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

A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it and apply that within your standard update timelines at low or medium mission impact and sooner than that at high; until then, restrict network exposure of the affected system or apply the vendor's mitigation.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact unknown (not published for this CVE). 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

July 29, 2013

Last Modified

April 29, 2026

References (12)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 4× in last 7d / 15× 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.

Showing the most recent 100 of 140 total refreshes for this CVE.

  1. 2026-10-05 17:38 UTCEPSS rescore
  2. 2026-10-04 23:16 UTCEPSS rescore
  3. 2026-09-30 14:58 UTCEPSS rescore
  4. 2026-09-30 00:12 UTCEG score recompute
  5. 2026-09-27 13:39 UTCEPSS rescore
  6. 2026-09-26 15:52 UTCEPSS rescore
  7. 2026-09-24 13:57 UTCEPSS rescore
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  20. 2026-08-27 14:20 UTCEPSS rescore
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  1. 2026-08-19 16:59 UTCEPSS rescore
  2. 2026-08-18 13:42 UTCEPSS rescore
  3. 2026-08-16 02:09 UTCEPSS rescore
  4. 2026-08-15 01:25 UTCEPSS rescore
  5. 2026-08-12 13:45 UTCEPSS rescore
  6. 2026-08-09 13:42 UTCEPSS rescore
  7. 2026-08-08 16:31 UTCEPSS rescore
  8. 2026-08-07 16:21 UTCEPSS rescore
  9. 2026-08-06 13:42 UTCEPSS rescore
  10. 2026-08-05 19:12 UTCEPSS rescore
  11. 2026-08-04 15:04 UTCEPSS rescore
  12. 2026-08-02 02:22 UTCEPSS rescore
  13. 2026-07-30 01:26 UTCEPSS rescore
  14. 2026-07-28 15:31 UTCEPSS rescore
  15. 2026-07-26 13:48 UTCEG score recompute▲ 4.70
  16. 2026-07-25 14:12 UTCEPSS rescore
  17. 2026-07-23 14:14 UTCEPSS rescore
  18. 2026-07-23 01:10 UTCEG score recompute
  19. 2026-07-23 00:13 UTCEG score recompute
  20. 2026-07-22 21:52 UTCEG score recompute
  21. 2026-07-22 14:04 UTCEPSS rescore
  22. 2026-07-22 14:04 UTCEPSS rescore
  23. 2026-07-21 15:21 UTCEPSS rescore
  24. 2026-07-20 17:03 UTCEPSS rescore
  25. 2026-07-20 17:03 UTCEPSS rescore
  26. 2026-07-19 14:27 UTCEPSS rescore
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  28. 2026-07-19 02:25 UTCEPSS rescore
  29. 2026-07-19 02:25 UTCEPSS rescore
  30. 2026-07-18 10:00 UTCEPSS rescore
  31. 2026-07-16 16:58 UTCEPSS rescore
  32. 2026-07-15 16:54 UTCEPSS rescore
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  34. 2026-07-15 01:56 UTCEPSS rescore
  35. 2026-07-13 22:26 UTCEPSS rescore
  36. 2026-07-13 06:08 UTCEPSS rescore
  37. 2026-07-11 08:23 UTCEPSS rescore
  38. 2026-07-09 19:05 UTCEPSS rescore
  39. 2026-07-08 15:10 UTCEPSS rescore
  40. 2026-07-06 02:19 UTCEPSS rescore
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  42. 2026-07-05 02:26 UTCEPSS rescore
  43. 2026-07-04 06:27 UTCEPSS rescore
  44. 2026-07-01 15:02 UTCEPSS rescore
  45. 2026-06-30 23:19 UTCEPSS rescore
  46. 2026-06-30 23:19 UTCEPSS rescore
  47. 2026-06-29 14:02 UTCEPSS rescore
  48. 2026-06-28 14:03 UTCEPSS rescore
  49. 2026-06-28 04:53 UTCEPSS rescore
  50. 2026-06-28 04:53 UTCEPSS rescore
  51. 2026-06-27 03:05 UTCEPSS rescore
  52. 2026-06-25 13:46 UTCEPSS rescore
  53. 2026-06-24 14:02 UTCEPSS rescore
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  55. 2026-06-23 21:30 UTCEPSS rescore
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  58. 2026-06-21 14:53 UTCEPSS rescore
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  61. 2026-06-19 19:23 UTCEPSS rescore
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  63. 2026-06-18 17:49 UTCEPSS rescore
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  67. 2026-06-16 17:49 UTCEPSS rescore
  68. 2026-06-16 17:49 UTCEPSS rescore
  69. 2026-06-15 17:44 UTCEPSS rescore
  70. 2026-06-14 23:14 UTCEPSS rescore
  71. 2026-06-13 22:57 UTCEPSS rescore
  72. 2026-06-12 23:08 UTCEPSS rescore
  73. 2026-06-11 13:56 UTCEPSS rescore
  74. 2026-06-10 13:18 UTCEPSS rescore
  75. 2026-06-08 14:14 UTCEPSS rescore

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Frequently asked(4)

What is CVE-2013-4129?
CVE-2013-4129 is a medium vulnerability published on July 29, 2013. The bridge multicast implementation in the Linux kernel through 3.10.3 does not check whether a certain timer is armed before modifying the timeout value of that timer, which allows local users to cause a denial of service (BUG and system crash) via vectors involving the shutdown of a KVM virtual…
When was CVE-2013-4129 disclosed?
CVE-2013-4129 was first published on July 29, 2013, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2013-4129 actively exploited?
CVE-2013-4129 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (37th percentile of EPSS-scored CVEs).
How do I remediate CVE-2013-4129?
A fix for CVE-2013-4129 is referenced (a reference tagged "Patch", often a source commit), but EchelonGraph has no release containing it on record. Check that reference and the vendor's advisory for a release that contains the fix and update to it; until then, restrict network exposure of the affected system or apply the vendor's mitigation.

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