CVE-2020-11494
First published: Thu Apr 02 2020(Updated: )
An issue was discovered in slc_bump in drivers/net/can/slcan.c in the Linux kernel 3.16 through 5.6.2. It allows attackers to read uninitialized can_frame data, potentially containing sensitive information from kernel stack memory, if the configuration lacks CONFIG_INIT_STACK_ALL, aka CID-b9258a2cece4.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.128-1 6.12.12-1 6.12.13-1 | |
| Linux Kernel | >=3.16<=5.6.2 | |
| openSUSE | =15.1 | |
| Debian | =8.0 | |
| Debian | =9.0 | |
| Ubuntu | =14.04 | |
| Ubuntu | =16.04 | |
| Ubuntu | =18.04 | |
| Ubuntu | =19.10 |
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Reference Links
- http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00035.html
- http://packetstormsecurity.com/files/159565/Kernel-Live-Patch-Security-Notice-LSN-0072-1.html
- https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=08fadc32ce6239dc75fd5e869590e29bc62bbc28
- https://github.com/torvalds/linux/commit/b9258a2cece4ec1f020715fe3554bc2e360f6264
- https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html
- https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html
- https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html
- https://security.netapp.com/advisory/ntap-20200430-0004/
- https://usn.ubuntu.com/4363-1/
- https://usn.ubuntu.com/4364-1/
- https://usn.ubuntu.com/4368-1/
- https://usn.ubuntu.com/4369-1/
- https://www.debian.org/security/2020/dsa-4698
- https://launchpad.net/bugs/cve/CVE-2020-11494
- https://lore.kernel.org/netdev/20200401100639.20199-1-rpalethorpe@suse.com/
- https://security-tracker.debian.org/tracker/CVE-2020-11494
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-11494
- https://nvd.nist.gov/vuln/detail/CVE-2020-11494
- https://ubuntu.com/security/CVE-2020-11494
Frequently Asked Questions
What is the severity of CVE-2020-11494?
CVE-2020-11494 is considered a security vulnerability that could potentially expose sensitive information.
How do I fix CVE-2020-11494?
To fix CVE-2020-11494, update the Linux kernel to a version newer than 5.6.2 or apply the recommended patches.
Which Linux distributions are affected by CVE-2020-11494?
CVE-2020-11494 affects Linux kernel versions from 3.16 to 5.6.2, impacting distributions such as openSUSE, Debian, and Ubuntu.
Can CVE-2020-11494 lead to data leakage?
Yes, CVE-2020-11494 allows attackers to read uninitialized can_frame data, which may contain sensitive information.
What specific kernel configuration is related to CVE-2020-11494?
CVE-2020-11494 is related to the lack of CONFIG_INIT_STACK_ALL in the kernel configuration.
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