What’s Vulnerable › Vulnerabilities

CVE-2023-6270: Kernel: aoe: improper reference count leads to use-after-free vulnerability

• Severity: high (CVSS 7.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-01-04 · updated 2026-10-29
• Weakness: CWE-416

Description

A flaw was found in the ATA over Ethernet (AoE) driver in the Linux kernel. The aoecmd_cfg_pkts() function improperly updates the refcnt on `struct net_device`, and a use-after-free can be triggered by racing between the free on the struct and the access through the `skbtxq` global queue. This could lead to a denial of service condition or potential code execution.

Affected products

• Debian Linux: 10.0
• Fedoraproject Fedora: 39
• Linux kernel: before 6.9 — fixed in 6.9

How to fix

Upgrade to a fixed version: Linux kernel 6.9. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/security/cve/CVE-2023-6270
• https://bugzilla.redhat.com/show_bug.cgi?id=2256786
• https://access.redhat.com/security/cve/CVE-2023-6270
• https://bugzilla.redhat.com/show_bug.cgi?id=2256786
• https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
• https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html

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