CVE-2023-6270: Kernel: aoe: improper reference count leads to use-after-free vulnerability
First published: Thu Jan 04 2024(Updated: )
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.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | ||
| Fedora | =39 | |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.123-1 6.1.128-1 6.12.12-1 6.12.17-1 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=2256786
- https://access.redhat.com/security/cve/CVE-2023-6270
- https://launchpad.net/bugs/cve/CVE-2023-6270
- https://www.zerodayinitiative.com/advisories/ZDI-CAN-22236/
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2256787
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2256786#c5
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/block/aoe?h=v6.10-rc3&id=f98364e926626c678fb4b9004b75cacf92ff0662
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-6270
- https://nvd.nist.gov/vuln/detail/CVE-2023-6270
- https://security-tracker.debian.org/tracker/CVE-2023-6270
- https://ubuntu.com/security/CVE-2023-6270
- https://www.zerodayinitiative.com/advisories/ZDI-CAN-22236
- https://git.kernel.org/linus/f98364e926626c678fb4b9004b75cacf92ff0662
Frequently Asked Questions
What is the severity of CVE-2023-6270?
CVE-2023-6270 is classified with a moderate severity due to the potential for a use-after-free vulnerability.
How do I fix CVE-2023-6270?
To remediate CVE-2023-6270, update your Linux kernel to the patched versions such as 5.10.223-1, 6.1.123-1, or newer versions.
Which systems are affected by CVE-2023-6270?
CVE-2023-6270 affects the Linux kernel and distributions like Fedora 39.
What type of vulnerability is CVE-2023-6270?
CVE-2023-6270 is a use-after-free vulnerability in the ATA over Ethernet driver of the Linux kernel.
How can CVE-2023-6270 impact my system?
Exploiting CVE-2023-6270 could allow an attacker to execute arbitrary code, leading to system compromise.
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