CVE-2023-3439: Use After Free
First published: Tue Jun 27 2023(Updated: )
A flaw was found in the MCTP protocol in the Linux kernel. The function mctp_unregister() reclaims the device's relevant resource when a netcard detaches. However, a running routine may be unaware of this and cause the use-after-free of the mdev->addrs object, potentially leading to a denial of service.
Credit: patrick@puiterwijk.org patrick@puiterwijk.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <5.18 | |
| Linux Linux kernel | =5.18-rc1 | |
| Linux Linux kernel | =5.18-rc2 | |
| Linux Linux kernel | =5.18-rc3 | |
| Linux Linux kernel | =5.18-rc4 | |
| redhat/kernel | <5.18 | 5.18 |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.119-1 6.11.10-1 6.12.5-1 |
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Reference Links
- http://www.openwall.com/lists/oss-security/2023/07/02/1
- https://bugzilla.redhat.com/show_bug.cgi?id=2217915
- https://github.com/torvalds/linux/commit/b561275d633bcd8e0e8055ab86f1a13df75a0269
- https://launchpad.net/bugs/cve/CVE-2023-3439
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-3439
- https://nvd.nist.gov/vuln/detail/CVE-2023-3439
- https://security-tracker.debian.org/tracker/CVE-2023-3439
- https://ubuntu.com/security/CVE-2023-3439
- https://git.kernel.org/linus/b561275d633bcd8e0e8055ab86f1a13df75a0269
- https://www.openwall.com/lists/oss-security/2023/07/02/1
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