Debian: Security Advisory for linux (DSA-4941-1)

The remote host is missing an update for the 'linux' package(s) announced via the DSA-4941-1 advisory.

Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks. CVE-2020-36311 A flaw was discovered in the KVM subsystem for AMD CPUs, allowing an attacker to cause a denial of service by triggering destruction of a large SEV VM. CVE-2021-3609 Norbert Slusarek reported a race condition vulnerability in the CAN BCM networking protocol, allowing a local attacker to escalate privileges. CVE-2021-33909 The Qualys Research Labs discovered a size_t-to-int conversion vulnerability in the Linux kernel's filesystem layer. An unprivileged local attacker able to create, mount, and then delete a deep directory structure whose total path length exceeds 1GB, can take advantage of this flaw for privilege escalation. Details can be found in the Qualys advisory at [link moved to references] CVE-2021-34693 Norbert Slusarek discovered an information leak in the CAN BCM networking protocol. A local attacker can take advantage of this flaw to obtain sensitive information from kernel stack memory.

'linux' package(s) on Debian Linux.

Checks if a vulnerable package version is present on the target host.

For the stable distribution (buster), these problems have been fixed in version 4.19.194-3. We recommend that you upgrade your linux packages.