CVE-2023-31083

MEDIUMNVD 4.74.7—
EchelonGraph scoreMEDIUM confidence

Score 4.7 from GitHub Security Advisory published 2023-04-24. NVD baseline CVSS 4.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
4.7
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 4.7Exploit: NoneExposed: 0

A fix is available — apply it.

An issue was discovered in drivers/bluetooth/hci_ldisc.c in the Linux kernel 6.2. In hci_uart_tty_ioctl, there is a race condition between HCIUARTSETPROTO and HCIUARTGETPROTO. HCI_UART_PROTO_SET is set before hu->proto is set. A NULL pointer dereference may occur.

CVSS v3
4.7
EG Score
4.7(medium)
EG Risk
26(Track)
EG Risk 26/100SSVC: 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
Severity47% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
24.9%
KEV
Not listed

Published

April 24, 2023

Last Modified

November 3, 2025

References (10)

Vendor Advisories for CVE-2023-31083(2)

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

Patch Availability(17)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-starfive (6.2.0.1009.10~22.04.2) @ jammy2026-05-25ubuntu
ubuntulinux-virtual-hwe-16.04-edge (4.15.0.219.3) @ xenial2026-05-25ubuntu
ubuntulinux-tools-nvidia-hwe-22.04-edge (6.2.0.1011.13) @ jammy2026-05-25ubuntu
ubuntulinux-tools-gke-5.15 (5.15.0.1046.45) @ jammy2026-05-25ubuntu
ubuntulinux-tools-intel-iotg (5.15.0.1045.45) @ jammy2026-05-25ubuntu
ubuntulinux-tools-raspi-nolpae (5.15.0.1042.40) @ jammy2026-05-25ubuntu
ubuntulinux-tools-aws-hwe (4.15.0.1162.145) @ xenial2026-05-25ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.2.0.36.36) @ lunar2026-05-25ubuntu
ubuntulinux-tools-azure (4.15.0.1171.137) @ trusty2026-05-25ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.4.0-1033 (5.4.0-1033.37) @ focal2026-05-25ubuntu
ubuntulinux-tools-aws (4.4.0.1124.121) @ trusty2026-05-25ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.88.85) @ jammy2026-05-25ubuntu
ubuntulinux-virtual-lts-xenial (4.4.0.246.252) @ xenial2026-05-25ubuntu
ubuntulinux-tools-iot (5.4.0.1025.23) @ focal2026-05-25ubuntu
redhatkernel-0:4.18.0-553.el8_102024-05-22redhat
redhatkernel-rt-0:4.18.0-553.rt7.342.el8_102024-05-22redhat
redhatkernel-0:5.14.0-427.13.1.el9_42024-04-30redhat

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(2)

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

Additional Vendor Advisories

(15)

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 13× in last 7d / 49× 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 104 total refreshes for this CVE.

  1. 2026-07-23 02:22 UTCEG score recompute
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Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2023-31083?
CVE-2023-31083 is a medium vulnerability published on April 24, 2023. An issue was discovered in drivers/bluetooth/hcildisc.c in the Linux kernel 6.2. In hciuartttyioctl, there is a race condition between HCIUARTSETPROTO and HCIUARTGETPROTO. HCIUARTPROTO_SET is set before hu->proto is set. A NULL pointer dereference may occur.
When was CVE-2023-31083 disclosed?
CVE-2023-31083 was first published in the National Vulnerability Database on April 24, 2023, with the most recent update on November 3, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-31083 actively exploited?
CVE-2023-31083 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 24.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2023-31083?
CVE-2023-31083 has a CVSS v3 base score of 4.7 (NVD).
How do I remediate CVE-2023-31083?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-31083, 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

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