CVE-2022-2588

HIGHNVD 7.87.8
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 7.8 under NVD CVSS v3. EPSS exploit probability: 5.9% (93rd 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
Trending — 3 sources updated this weekElevated
7.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • Public exploit or proof-of-concept code is available
CISA-KEV: Not listedEPSS PROB: 5.9%CVSS: 7.8Exploit: Public PoCExposed services: Not assessed

A fix is available — apply it.

It was discovered that the cls_route filter implementation in the Linux kernel would not remove an old filter from the hashtable before freeing it if its handle had the value 0.

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
51
EG Risk 51/100

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.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (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
5.9%
EPSS %ILE
93rd
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.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
5.9% 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 low or medium mission impact; Track* at high (mission-essential systems).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 low or medium mission impact; Track* at high (mission-essential systems).

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

Exploitation public PoC (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

January 8, 2024

Last Modified

October 14, 2026

Advisory Details (10)

Auto-updated Oct 14, 2026
Patch available. Sources: ubuntu.
UbuntuMentions a patch (unverified)

USN-5560-1: Linux kernel vulnerabilities | Ubuntu security notices | Ubuntu

https://ubuntu.com/security/notices/USN-5560-1
UbuntuMentions a patch (unverified)

USN-5588-1: Linux kernel vulnerability | Ubuntu security notices | Ubuntu

https://ubuntu.com/security/notices/USN-5588-1
Web page

ZDI-22-1117 - TrendAI™ Zero Day Initiative™ (ZDI)

https://www.zerodayinitiative.com/advisories/ZDI-22-1117/
UbuntuMentions a patch (unverified)

USN-5566-1: Linux kernel vulnerabilities | Ubuntu security notices | Ubuntu

https://ubuntu.com/security/notices/USN-5566-1
UbuntuMentions a patch (unverified)

USN-5564-1: Linux kernel (Intel IoTG) vulnerabilities | Ubuntu security notices | Ubuntu

https://ubuntu.com/security/notices/USN-5564-1
UbuntuMentions a patch (unverified)

USN-5582-1: Linux kernel (Azure CVM) vulnerabilities | Ubuntu security notices | Ubuntu

https://ubuntu.com/security/notices/USN-5582-1
Web page

oss-security - CVE-2022-2588 - Linux kernel cls_route UAF

https://www.openwall.com/lists/oss-security/2022/08/09/6
UbuntuMentions a patch (unverified)

USN-5562-1: Linux kernel vulnerabilities | Ubuntu security notices | Ubuntu

https://ubuntu.com/security/notices/USN-5562-1
UbuntuMentions a patch (unverified)

USN-5565-1: Linux kernel vulnerabilities | Ubuntu security notices | Ubuntu

https://ubuntu.com/security/notices/USN-5565-1

Patch Availability(24)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulinux-tools-azure-fde (5.4.0.1089.94+cvm1.29) @ focal2026-10-21ubuntu
ubuntulinux-lowlatency (3.13.0.191.201) @ trusty2026-10-21ubuntu
ubuntulinux-modules-iwlwifi-5.17.0-1015-oem (5.17.0-1015.16) @ jammy2026-10-21ubuntu
ubuntulinux-image-4.15.0-191-generic-lpae (4.15.0-191.202) @ bionic2026-10-21ubuntu
ubuntulinux-tools-aws-hwe (4.15.0.1139.126) @ xenial2026-10-21ubuntu
ubuntulinux-image-lowlatency (4.4.0.231.237) @ xenial2026-10-21ubuntu
ubuntulinux-image-lowlatency (5.4.0.124.125) @ focal2026-10-21ubuntu
ubuntulinux-tools-5.15.0-1013-intel-iotg (5.15.0-1013.17) @ jammy2026-10-21ubuntu
ubuntulinux-image-lowlatency (5.15.0.46.43) @ jammy2026-10-21ubuntu
ubuntuibm (5.4.0-1009) @ focal2026-10-21ubuntu
redhatkernel-0:3.10.0-1062.76.1.el72023-07-11redhat
redhatkpatch-patch2023-07-11redhat
redhatkernel-rt-0:3.10.0-1160.80.1.rt56.1225.el72022-11-02redhat
redhatkernel-0:3.10.0-1160.80.1.el72022-11-02redhat
redhatkernel-rt-0:4.18.0-193.93.1.rt13.143.el8_22022-11-01redhat
redhatkernel-0:4.18.0-193.93.1.el8_22022-11-01redhat
redhatkernel-0:3.10.0-693.106.1.el72022-10-25redhat
redhatkernel-rt-0:4.18.0-372.32.1.rt7.189.el8_62022-10-25redhat
redhatkernel-0:4.18.0-372.32.1.el8_62022-10-25redhat
redhatkernel-0:3.10.0-957.99.1.el72022-10-25redhat
redhatkernel-0:4.18.0-305.65.1.el8_42022-10-18redhat
redhatkernel-rt-0:4.18.0-305.65.1.rt7.137.el8_42022-10-18redhat
redhatkernel-0:4.18.0-147.76.1.el8_12022-10-11redhat
redhatredhat-virtualization-host-0:4.5.2-202209140405_8.62022-09-19redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(6 across 5 ecosystems)
Debian:10(2)
PackageVulnerable rangeFix by version rangeDependents
linux4.19.118-1 ... 4.19.98-1~bpo9+1 (40 versions)
  • every version up to 4.19.260-1: fixed in 4.19.260-1
—
linux-5.10—
  • every version up to 5.10.136-1~deb10u1: fixed in 5.10.136-1~deb10u1
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
linux5.10.103-1 ... 5.10.92-2 (17 versions)
  • every version up to 5.10.136-1: fixed in 5.10.136-1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 5.18.16-1: fixed in 5.18.16-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 5.18.16-1: fixed in 5.18.16-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 5.18.16-1: fixed in 5.18.16-1
—

Weakness Classification(2)

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

Additional Vendor Advisories

(18)

Data Freshness Timeline

(refreshed 10× in last 7d / 40× 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 196 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 99 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-23 16:28 UTCEPSS rescoreEPSS 5.9% · 93rd percentile
  2. 2026-10-22 16:30 UTCEPSS rescoreEPSS 5.9% · 93rd percentile
  3. 2026-10-21 16:28 UTCEPSS rescoreEPSS 5.9% · 93rd percentile
  4. 2026-10-21 12:23 UTCEG score recompute
  5. 2026-10-21 12:23 UTCVendor advisory
  6. 2026-10-20 16:29 UTCEPSS rescoreEPSS 5.9% · 93rd percentile
  7. 2026-10-19 16:28 UTCEPSS rescoreEPSS 5.9% · 93rd percentile
  8. 2026-10-18 16:28 UTCEPSS rescoreEPSS 5.9% · 93rd percentile
  9. 2026-10-18 08:40 UTCEG score recompute
  10. 2026-10-17 16:29 UTCEPSS rescoreEPSS 5.9% · 93rd percentile
  11. 2026-10-16 16:34 UTCEPSS rescoreEPSS 5.9% · 93rd percentile
  12. 2026-10-15 16:28 UTCEPSS rescoreEPSS 5.9% · 93rd percentile
  13. 2026-10-14 16:29 UTCEPSS rescoreEPSS 5.9% · 93rd percentile
  14. 2026-10-14 14:35 UTCEG score recompute▲ 2.50
  15. 2026-10-14 14:35 UTCVendor advisory
  16. 2026-10-14 14:24 UTCNVD updateCVSS v3 → 7.8 · severity → HIGH
  17. 2026-10-14 13:42 UTCEG score recompute
  18. 2026-10-14 13:42 UTCVendor advisory
  19. 2026-10-13 16:29 UTCEPSS rescoreEPSS 5.9% · 93rd percentile
  20. 2026-10-12 18:58 UTCEG score recompute
  21. 2026-10-12 16:30 UTCEPSS rescoreEPSS 5.9% · 93rd percentile
  22. 2026-10-12 08:24 UTCOSV refresh
  23. 2026-10-11 23:23 UTCEG score recompute
  24. 2026-10-11 13:44 UTCEPSS rescoreEPSS 5.9% · 93rd percentile
  25. 2026-10-10 19:56 UTCEPSS rescoreEPSS 5.9% · 93rd percentile
Show 72 more
  1. 2026-10-09 20:04 UTCEPSS rescoreEPSS 5.9% · 93rd percentile
  2. 2026-10-08 16:40 UTCEPSS rescoreEPSS 5.9% · 93rd percentile
  3. 2026-10-07 23:45 UTCEPSS rescoreEPSS 5.9% · 93rd percentile
  4. 2026-10-06 15:14 UTCEPSS rescoreEPSS 5.9% · 93rd percentile
  5. 2026-10-05 17:40 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  6. 2026-10-03 14:23 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  7. 2026-10-02 16:23 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  8. 2026-09-30 15:52 UTCEG score recompute
  9. 2026-09-30 15:00 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  10. 2026-09-29 15:16 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  11. 2026-09-28 13:48 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  12. 2026-09-27 13:42 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  13. 2026-09-26 15:54 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  14. 2026-09-26 00:22 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  15. 2026-09-24 14:00 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  16. 2026-09-23 13:45 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  17. 2026-09-22 14:44 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  18. 2026-09-22 11:46 UTCOSV refresh
  19. 2026-09-20 20:13 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  20. 2026-09-19 15:38 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  21. 2026-09-18 19:24 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  22. 2026-09-16 14:05 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  23. 2026-09-15 03:06 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  24. 2026-09-12 14:57 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  25. 2026-09-11 14:49 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  26. 2026-09-11 09:33 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  27. 2026-09-08 21:57 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  28. 2026-09-06 13:45 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  29. 2026-09-05 15:25 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  30. 2026-09-04 13:57 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  31. 2026-09-04 05:04 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  32. 2026-09-03 08:59 UTCOSV refresh
  33. 2026-09-02 14:09 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  34. 2026-09-01 13:51 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  35. 2026-08-30 19:14 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  36. 2026-08-30 01:19 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  37. 2026-08-28 21:38 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  38. 2026-08-27 14:22 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  39. 2026-08-26 14:43 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  40. 2026-08-25 13:46 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  41. 2026-08-24 14:13 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  42. 2026-08-23 00:16 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  43. 2026-08-21 23:46 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  44. 2026-08-20 22:52 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  45. 2026-08-19 17:01 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  46. 2026-08-18 13:45 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  47. 2026-08-17 13:44 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  48. 2026-08-16 22:26 UTCOSV refresh
  49. 2026-08-16 14:53 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  50. 2026-08-16 02:11 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  51. 2026-08-15 01:27 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  52. 2026-08-13 21:57 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  53. 2026-08-12 13:48 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  54. 2026-08-11 13:38 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  55. 2026-08-09 13:44 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  56. 2026-08-08 16:34 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  57. 2026-08-07 16:24 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  58. 2026-08-06 13:44 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  59. 2026-08-05 19:15 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  60. 2026-08-04 15:07 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  61. 2026-08-04 10:35 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  62. 2026-08-03 10:33 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  63. 2026-08-02 02:24 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  64. 2026-08-01 16:06 UTCOSV refresh
  65. 2026-08-01 04:13 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  66. 2026-07-30 16:25 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  67. 2026-07-30 01:28 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  68. 2026-07-28 15:33 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  69. 2026-07-26 14:52 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  70. 2026-07-25 14:15 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  71. 2026-07-24 14:15 UTCEPSS rescoreEPSS 5.9% · 92nd percentile
  72. 2026-07-23 14:16 UTCEPSS rescoreEPSS 5.9% · 92nd percentile

Publicly available exploits

(7 references)

Public exploit code is referenced for this CVE (7 GitHub PoCs). Defenders should treat patch urgency accordingly.

  • GitHub PoCLSinus/CacheMeIfYouCan
    Published Feb 23, 2026

    SLUBStick exploitation of CVE-2022-2588. Converting a DF into a cross-cache arbitrary memory R/W primitive through PTE manipulation.

    Open source ↗
  • GitHub PoCveritas501/CVE-2022-2588
    Published Mar 2, 2023

    CVE-2022-2588

    Open source ↗
  • GitHub PoCBassamGraini/CVE-2022-2588
    Published Dec 4, 2022
    Open source ↗
  • GitHub PoCnopgadget/CVE-2022-2588
    Published Sep 18, 2022

    A PoC for CVE-2022-2588 that triggers a WARNING

    Open source ↗
  • GitHub PoCkonoha279/2022-LPE-UAF
    Published Aug 24, 2022

    CVE-2022-2588,CVE-2022-2586,CVE-2022-2585

    Open source ↗
  • GitHub PoCpirenga/2022-LPE-UAF
    Published Aug 23, 2022

    CVE-2022-2588,CVE-2022-2586,CVE-2022-2585

    Open source ↗
  • GitHub PoCMarkakd/CVE-2022-2588
    Published Aug 11, 2022

    exploit for CVE-2022-2588

    Open source ↗

Frequently asked(5)

What is CVE-2022-2588?
CVE-2022-2588 is a high-severity vulnerability; its CVE record was published on January 8, 2024. It was discovered that the cls_route filter implementation in the Linux kernel would not remove an old filter from the hashtable before freeing it if its handle had the value 0.
When was the CVE record for CVE-2022-2588 published?
The CVE record for CVE-2022-2588 was published on January 8, 2024. 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 October 14, 2026; the record at its source may have been updated since.
Is CVE-2022-2588 actively exploited?
CVE-2022-2588 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 5.9% probability of exploitation in the next 30 days (93rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2022-2588?
CVE-2022-2588 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2022-2588?
A fix for CVE-2022-2588 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2022-2588 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2022-2588

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