CVE-2023-35788

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2023-06-16. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.8Exploit: Elevated riskExposed: 0

A fix is available — apply it.

An issue was discovered in fl_set_geneve_opt in net/sched/cls_flower.c in the Linux kernel before 6.3.7. It allows an out-of-bounds write in the flower classifier code via TCA_FLOWER_KEY_ENC_OPTS_GENEVE packets. This may result in denial of service or privilege escalation.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
51(Track*)
EG Risk 51/100SSVC: Track*

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
Severity78% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
1%
EPSS %ILE
42%
KEV
Not listed

Published

June 16, 2023

Last Modified

May 5, 2025

References (20)

Vendor Advisories for CVE-2023-35788(9)

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

Patch Availability(22)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-intel-iotg (5.15.0.1034.33) @ jammy2026-05-24ubuntu
ubuntulinux-tools-oem-22.04a (5.17.0.1034.32) @ jammy2026-05-24ubuntu
ubuntulinux-headers-5.4.0-1025-xilinx-zynqmp (5.4.0-1025.29) @ focal2026-05-24ubuntu
ubuntulinux-modules-extra-6.2.0-1008-gcp (6.2.0-1008.8) @ lunar2026-05-24ubuntu
ubuntulinux-tools-oem-22.04b (6.0.0.1019.19) @ jammy2026-05-24ubuntu
ubuntulinux-image-lowlatency (6.2.0.1007.7) @ lunar2026-05-24ubuntu
redhatkpatch-patch2023-10-10redhat
redhatkernel-rt-0:5.14.0-70.75.1.rt21.146.el9_02023-10-10redhat
redhatkernel-0:5.14.0-70.75.1.el9_02023-10-10redhat
redhatkernel-0:4.18.0-477.27.1.el8_82023-09-19redhat
redhatkernel-rt-0:4.18.0-477.27.1.rt7.290.el8_82023-09-19redhat
redhatkernel-rt-0:4.18.0-305.103.1.rt7.178.el8_42023-09-05redhat
redhatkernel-0:4.18.0-305.103.1.el8_42023-09-05redhat
redhatkernel-0:3.10.0-1160.99.1.el72023-08-29redhat
redhatkernel-0:4.18.0-193.113.1.el8_22023-08-29redhat
redhatkernel-0:4.18.0-372.70.1.el8_62023-08-29redhat
redhatkernel-rt-0:3.10.0-1160.99.1.rt56.1245.el72023-08-29redhat
redhatkernel-rt-0:4.18.0-193.113.1.rt13.164.el8_22023-08-29redhat
redhatkernel-0:3.10.0-1062.77.1.el72023-08-22redhat
redhatkernel-0:4.18.0-147.87.1.el8_12023-08-08redhat
redhatkernel-rt-0:5.14.0-284.25.1.rt14.310.el9_22023-08-01redhat
redhatkernel-0:5.14.0-284.25.1.el9_22023-08-01redhat

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.

Weakness Classification(1)

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

Additional Vendor Advisories

(16)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 11× in last 7d / 50× 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 113 total refreshes for this CVE.

  1. 2026-07-26 14:52 UTCEPSS rescore
  2. 2026-07-25 14:16 UTCEPSS rescore
  3. 2026-07-24 14:16 UTCEPSS rescore
  4. 2026-07-23 14:16 UTCEPSS rescore
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  6. 2026-07-23 02:24 UTCEG score recompute
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  19. 2026-07-15 17:53 UTCOSV refresh
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  1. 2026-07-13 06:11 UTCEPSS rescore
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  23. 2026-06-28 04:55 UTCEPSS rescore
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  25. 2026-06-27 18:34 UTCOSV refresh
  26. 2026-06-27 03:07 UTCEPSS rescore
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  28. 2026-06-25 13:48 UTCEPSS rescore
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  49. 2026-06-14 23:16 UTCEPSS rescore
  50. 2026-06-13 22:59 UTCEPSS rescore
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  54. 2026-06-11 13:59 UTCEPSS rescore
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  56. 2026-06-10 22:17 UTCEPSS rescore
  57. 2026-06-10 05:17 UTCOSV refresh
  58. 2026-06-08 14:16 UTCEPSS rescore
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  73. 2026-05-31 22:30 UTCEPSS rescore
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Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2023-35788?
CVE-2023-35788 is a high vulnerability published on June 16, 2023. An issue was discovered in flsetgeneveopt in net/sched/clsflower.c in the Linux kernel before 6.3.7. It allows an out-of-bounds write in the flower classifier code via TCAFLOWERKEYENCOPTS_GENEVE packets. This may result in denial of service or privilege escalation.
When was CVE-2023-35788 disclosed?
CVE-2023-35788 was first published in the National Vulnerability Database on June 16, 2023, with the most recent update on May 5, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-35788 actively exploited?
CVE-2023-35788 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 58.2% of all scored CVEs.
What is the CVSS score of CVE-2023-35788?
CVE-2023-35788 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2023-35788?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-35788, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2023-35788

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