CVE-2020-11494: Medium severity Linux Linux kernel vulnerability
An issue was discovered in slcbump in drivers/net/can/slcan.c in the Linux kernel 3.16 through 5.6.2. It allows attackers to read uninitialized canframe data, potentially containing sensitive information from kernel stack memory, if the configuration lacks CONFIGINITSTACKALL, aka CID-b9258a2cece4.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 5.10.223-1Fixed in 5.10.262-1Fixed in 6.1.176-1Fixed in 6.1.180-1Fixed in 6.12.94-1Fixed in 6.12.101-1Fixed in 7.1.8-1Fixed in 7.1.8-2 - Compensating control
Ensure the system is built with CONFIG_INIT_STACK_ALL enabled to prevent reading uninitialized can_frame data in slc_bump (drivers/net/can/slcan.c) affecting Linux kernel versions 3.16 through 5.6.2.
Event History
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.