CVE-2022-3636

HIGHNVD 7.87.8
EchelonGraph scoreMEDIUM confidence

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

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2022-10-21. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 3 sources updated this week
7.8EG
EchelonGraph verdictPlan mitigationRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 7.8Exploit: 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).

A vulnerability was identified in Linux Kernel 33fc42de33278b2b3ec6f3390512987bc29a62b7. This affects the function __mtk_ppe_check_skb of the file drivers/net/ethernet/mediatek/mtk_ppe.c of the component Ethernet Handler. Such manipulation leads to use after free. The name of the patch is 17a5f6a78dc7b8db385de346092d7d9f9dc24df6. It is best practice to apply a patch to resolve this issue. No released Linux Kernel version was ever affected by this CVE.

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
35
EG Risk 35/100

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)
Severity78% × 45%
Impact severity (EG Severity): CVSS 7.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
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 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; until then, restrict network exposure of the affected system or apply the vendor's mitigation.
EPSS PROB
0.4%
EPSS %ILE
29th
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 (7.8): severity, escalated by confirmed exploitation. This CVE's 7.8 is its impact severity (EG Severity), not escalated.

EG Severity
7.8 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-20). 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: 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 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; until then, restrict network exposure of the affected system or apply the vendor's mitigation.

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

October 21, 2022

Last Modified

July 28, 2026

Advisory Details (2)

Auto-updated Jul 28, 2026
Fix referenced — no release confirmed yet.
Web page

The Linux Kernel Archives

https://www.kernel.org/
Web page

net: ethernet: mtk_eth_soc: use after free in __mtk_ppe_check_skb() - kernel/git/pabeni/net-next.git - pabeni net-next tree

https://git.kernel.org/pub/scm/linux/kernel/git/pabeni/net-next.git/commit/?id=17a5f6a78dc7b8db385de346092d7d9f9dc24df6

Vendor Advisories for CVE-2022-3636(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 33× 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 93 of 195 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. 7 repeat rows among the latest 100 are merged into the row they repeat. The 102 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-22 16:30 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  2. 2026-10-21 16:29 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  3. 2026-10-21 06:43 UTCEG score recompute
  4. 2026-10-21 06:42 UTCGHSA enrichmentGHSA-wp33-7frp-g7vg · GitHub severity HIGH · GitHub CVSS 7.8
  5. 2026-10-20 16:29 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  6. 2026-10-19 16:28 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  7. 2026-10-18 16:28 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  8. 2026-10-18 08:31 UTCEG score recompute
  9. 2026-10-17 16:29 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  10. 2026-10-16 16:35 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  11. 2026-10-15 16:28 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  12. 2026-10-14 16:29 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  13. 2026-10-13 16:29 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  14. 2026-10-12 18:50 UTCEG score recompute
  15. 2026-10-12 16:30 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  16. 2026-10-11 23:14 UTCEG score recompute
  17. 2026-10-11 13:44 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  18. 2026-10-10 19:56 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  19. 2026-10-09 20:04 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  20. 2026-10-08 16:40 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  21. 2026-10-07 23:45 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  22. 2026-10-06 15:14 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  23. 2026-10-05 17:40 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  24. 2026-10-04 23:19 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  25. 2026-10-03 14:23 UTCEPSS rescoreEPSS 0.4% · 26th percentile
Show 68 more
  1. 2026-10-02 16:23 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  2. 2026-10-01 19:47 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  3. 2026-09-30 15:59 UTCEG score recompute
  4. 2026-09-30 15:00 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  5. 2026-09-29 15:16 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  6. 2026-09-27 13:42 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  7. 2026-09-26 00:22 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  8. 2026-09-24 14:00 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  9. 2026-09-22 14:45 UTCEPSS rescoreEPSS 0.3% · 28th percentile
  10. 2026-09-20 20:13 UTCEPSS rescoreEPSS 0.3% · 28th percentile
  11. 2026-09-19 15:38 UTCEPSS rescoreEPSS 0.3% · 28th percentile
  12. 2026-09-17 19:24 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  13. 2026-09-16 14:05 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  14. 2026-09-15 03:07 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  15. 2026-09-12 14:57 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  16. 2026-09-11 14:50 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  17. 2026-09-11 09:33 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  18. 2026-09-08 21:57 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  19. 2026-09-07 15:58 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  20. 2026-09-06 13:45 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  21. 2026-09-05 15:25 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  22. 2026-09-04 13:57 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  23. 2026-09-04 05:04 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  24. 2026-09-02 14:09 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  25. 2026-09-01 13:51 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  26. 2026-08-30 19:14 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  27. 2026-08-30 01:19 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  28. 2026-08-28 21:38 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  29. 2026-08-27 14:22 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  30. 2026-08-26 14:43 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  31. 2026-08-25 13:46 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  32. 2026-08-24 14:13 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  33. 2026-08-23 00:17 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  34. 2026-08-21 23:46 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  35. 2026-08-20 22:52 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  36. 2026-08-19 17:01 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  37. 2026-08-18 13:45 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  38. 2026-08-17 13:44 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  39. 2026-08-16 14:53 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  40. 2026-08-16 02:11 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  41. 2026-08-15 01:27 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  42. 2026-08-13 21:58 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  43. 2026-08-12 13:48 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  44. 2026-08-11 13:39 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  45. 2026-08-10 14:08 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  46. 2026-08-09 13:44 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  47. 2026-08-08 16:34 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  48. 2026-08-07 16:24 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  49. 2026-08-06 13:44 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  50. 2026-08-05 19:15 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  51. 2026-08-04 15:07 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  52. 2026-08-04 10:35 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  53. 2026-08-02 02:24 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  54. 2026-08-01 04:13 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  55. 2026-07-30 16:25 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  56. 2026-07-30 01:28 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  57. 2026-07-28 18:27 UTCEG score recompute
  58. 2026-07-28 18:27 UTCGHSA enrichmentGHSA-wp33-7frp-g7vg · GitHub severity HIGH · GitHub CVSS 7.8
  59. 2026-07-28 18:24 UTCNVD updateCVSS v3 → 7.8 · severity → HIGH
  60. 2026-07-28 17:27 UTCEG score recompute
  61. 2026-07-28 17:27 UTCGHSA enrichmentGHSA-wp33-7frp-g7vg · GitHub severity HIGH · GitHub CVSS 7.8
  62. 2026-07-28 17:23 UTCMITRE cvelistV5CVSS v4 → 5.1
  63. 2026-07-28 15:33 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  64. 2026-07-26 14:52 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  65. 2026-07-25 14:15 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  66. 2026-07-24 14:15 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  67. 2026-07-23 14:16 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  68. 2026-07-23 02:12 UTCEG score recompute

Frequently asked(5)

What is CVE-2022-3636?
CVE-2022-3636 is a high-severity vulnerability; its CVE record was published on October 21, 2022. A vulnerability was identified in Linux Kernel 33fc42de33278b2b3ec6f3390512987bc29a62b7. This affects the function mtkppecheckskb of the file drivers/net/ethernet/mediatek/mtkppe.c of the component Ethernet Handler. Such manipulation leads to use after free. The name of the patch is…
When was the CVE record for CVE-2022-3636 published?
The CVE record for CVE-2022-3636 was published on October 21, 2022. 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 July 28, 2026; the record at its source may have been updated since.
Is CVE-2022-3636 actively exploited?
CVE-2022-3636 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (29th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2022-3636?
CVE-2022-3636 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2022-3636?
A fix for CVE-2022-3636 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. The vendor advisories EchelonGraph has for CVE-2022-3636 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2022-3636

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