Vulnary
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Critical· 10official fix available

CVE-2024-38558

A critical flaw in the Linux kernel’s Open vSwitch packet handling can overwrite connection‑tracking data for ICMPv6 packets, causing incorrect packet matching and potentially executing unintended actions. The bug occurs when parsing non‑Neighbor Discovery ICMPv6 packets, wiping most of the destination address from the original conntrack tuple. This could allow an attacker to manipulate packet processing within the kernel.

publishedJun 19, 2024
last modifiedAug 4, 2026
sourcesNVD
severity · cvss
10
critical · how bad it is
exploitation · epss
<1%
18th percentile · chance of exploitation in 30 days
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →
auto-deletes from the system
counting…on Sep 4, 2026

An official fix is available, so this entry is kept for 30 days and then removed automatically.

01

Who is affected

Linux kernel, specifically the Open vSwitch packet execution path (OVS_PACKET_CMD_EXECUTE).

02

Real-world impact

An attacker could cause the kernel to mis‑handle ICMPv6 packets, leading to incorrect packet matching and potentially executing unintended actions, which could compromise system integrity or allow privilege escalation.

03

Why this severity

The CVSS score of 10 reflects that the vulnerability is exploitable over the network with no authentication or user interaction, and it can completely compromise confidentiality, integrity, and availability by allowing an attacker to manipulate packet handling.

04

What to do about it

official fix available
recommended steps
  1. 01Upgrade the Linux kernel to a version that includes the fix for CVE-2024-38558.
  2. 02Restart the system to load the updated kernel.

NVD-referenced vendor advisory

05

Timeline

  1. Jun 19, 2024 · Jun 19, 2024
    Published
    Disclosed and added to the National Vulnerability Database.
  2. Aug 4, 2026 · 2d ago
    Advisory updated
    The NVD record was last revised.
  3. Aug 5, 2026 · 1d ago
    Official fix available
    A vendor patch or mitigation now exists — see the remediation steps above.
06

How it’s attacked

Attack vectorNetwork (remote)
Attack complexityLow
Privileges requiredNone
User interactionNone needed
ScopeChanged
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
07

References & advisories

NVD advisory ↗Search advisories ↗
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →