CVE-2020-11935: aufs: improperly managed inode reference counts in the vfsub_dentry_open() method
First published: Fri Apr 07 2023(Updated: )
It was discovered that aufs improperly managed inode reference counts in the vfsub_dentry_open() method. A local attacker could use this vulnerability to cause a denial of service attack.
Credit: security@ubuntu.com security@ubuntu.com security@ubuntu.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Canonical Ubuntu Linux | =14.04 | |
| Canonical Ubuntu Linux | =16.04 | |
| Canonical Ubuntu Linux | =18.04 | |
| Canonical Ubuntu Linux | =20.04 | |
| Debian Debian Linux | =10.0 | |
| Linux Linux kernel | ||
| debian/aufs |
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Reference Links
- https://bugs.launchpad.net/bugs/1873074
- https://ubuntu.com/security/CVE-2020-11935
- https://launchpad.net/bugs/cve/CVE-2020-11935
- https://sourceforge.net/p/aufs/mailman/message/37048642/
- https://github.com/sfjro/aufs4-linux/commit/515a586eeef31e0717d5dea21e2c11a965340b3c
- https://github.com/sfjro/aufs4-linux/commit/f10aea57d39d6cd311312e9e7746804f7059b5c8
- https://security-tracker.debian.org/tracker/CVE-2020-11935
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-11935
- https://nvd.nist.gov/vuln/detail/CVE-2020-11935
Frequently Asked Questions
What is CVE-2020-11935?
CVE-2020-11935 is a vulnerability in aufs that allows a local attacker to cause a denial of service attack.
What is the severity of CVE-2020-11935?
The severity of CVE-2020-11935 is not specified.
How can a local attacker exploit CVE-2020-11935?
A local attacker can exploit CVE-2020-11935 by improperly managing inode reference counts in the vfsub_dentry_open() method.
Which software versions are affected by CVE-2020-11935?
The software versions affected by CVE-2020-11935 are listed in the provided reference links.
How can I fix CVE-2020-11935?
To fix CVE-2020-11935, update to the recommended software versions as mentioned in the provided reference links.
- collector/nvd-index
- agent/type
- collector/launchpad-cve
- source/Launchpad
- agent/weakness
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- agent/author
- collector/security-tracker-debian
- source/Debian
- collector/mitre-cve
- source/MITRE
- agent/severity
- agent/title
- agent/references
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- collector/usn-cve
- source/Ubuntu
- agent/description
- agent/event
- collector/nvd-cve
- agent/last-modified-date
- agent/trending
- vendor/canonical
- canonical/canonical ubuntu linux
- version/canonical ubuntu linux/14.04
- version/canonical ubuntu linux/16.04
- version/canonical ubuntu linux/18.04
- version/canonical ubuntu linux/20.04
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/10.0
- vendor/linux
- canonical/linux linux kernel
- package-manager/debian