Vulnerability Description
fs/namei.c in the Linux kernel before 5.5 has a may_create_in_sticky use-after-free, which allows local users to cause a denial of service (OOPS) or possibly obtain sensitive information from kernel memory, aka CID-d0cb50185ae9. One attack vector may be an open system call for a UNIX domain socket, if the socket is being moved to a new parent directory and its old parent directory is being removed.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.19, < 5.5 |
Related Weaknesses (CWE)
References
- http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00021.html
- http://packetstormsecurity.com/files/157233/Kernel-Live-Patch-Security-Notice-LS
- http://www.openwall.com/lists/oss-security/2020/01/28/4Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2020/02/02/1
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d0cb5Mailing ListPatchVendor Advisory
- https://github.com/torvalds/linux/commit/d0cb50185ae942b03c4327be322055d622dc79fPatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html
- https://security.netapp.com/advisory/ntap-20200313-0003/
- https://usn.ubuntu.com/4318-1/
- https://usn.ubuntu.com/4319-1/
- https://usn.ubuntu.com/4320-1/
- https://usn.ubuntu.com/4324-1/
- https://usn.ubuntu.com/4325-1/
- https://www.debian.org/security/2020/dsa-4667
- https://www.debian.org/security/2020/dsa-4698
FAQ
What is CVE-2020-8428?
CVE-2020-8428 is a vulnerability with a CVSS score of 7.1 (HIGH). fs/namei.c in the Linux kernel before 5.5 has a may_create_in_sticky use-after-free, which allows local users to cause a denial of service (OOPS) or possibly obtain sensitive information from kernel m...
How severe is CVE-2020-8428?
CVE-2020-8428 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-8428?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.