QID 198309

Date Published: 2021-04-01

QID 198309: Ubuntu Security Notification for Linux, Linux-aws, Linux-aws-hwe, Linux-azure, Linux-azure-4.15, (USN-4890-1)

It was discovered that the BPF subsystem in the Linux kernel did not properly compute a speculative execution limit on pointer arithmetic in some situations.

It was discovered that the BPF subsystem in the Linux kernel did not properly apply speculative execution limits on some pointer types.

A local attacker could use this to expose sensitive information (kernel memory). (CVE-2020-27171)

A local attacker could use this to expose sensitive information (kernel memory). (CVE-2020-27170)

CVSS V3 rated as High - 6 severity.

CVSS V2 rated as Medium - 3.6 severity.

Solution

Refer to Ubuntu advisory USN-4890-1 for affected packages and patching details, or update with your package manager.

Vendor References

USN-4890-1 - usn.ubuntu.com/4890-1/

CVEs related to QID 198309

CVE-2020-27170 | CVE-2020-27171 |

Software Advisories

Advisory ID	Software	Component	Link
USN-4890-1	16.04 (Xenial) on src	linux-image-4.15.0-1068-oracle	launchpad.net/ubuntu/+source/linux-aws/4.15.0-1097.104
USN-4890-1	16.04 (Xenial) on src	linux-image-4.15.0-1096-gcp	launchpad.net/ubuntu/+source/linux-aws/4.15.0-1097.104
USN-4890-1	16.04 (Xenial) on src	linux-image-4.15.0-1097-aws	launchpad.net/ubuntu/+source/linux-aws/4.15.0-1097.104
USN-4890-1	16.04 (Xenial) on src	linux-image-4.15.0-1111-azure	launchpad.net/ubuntu/+source/linux-aws/4.15.0-1097.104
USN-4890-1	16.04 (Xenial) on src	linux-image-4.15.0-140-generic	launchpad.net/ubuntu/+source/linux-aws/4.15.0-1097.104
USN-4890-1	16.04 (Xenial) on src	linux-image-4.15.0-140-generic-lpae	launchpad.net/ubuntu/+source/linux-aws/4.15.0-1097.104
USN-4890-1	16.04 (Xenial) on src	linux-image-4.15.0-140-lowlatency	launchpad.net/ubuntu/+source/linux-aws/4.15.0-1097.104
USN-4890-1	16.04 (Xenial) on src	linux-image-aws-hwe	launchpad.net/ubuntu/+source/linux-aws/4.15.0-1097.104
USN-4890-1	16.04 (Xenial) on src	linux-image-azure	launchpad.net/ubuntu/+source/linux-aws/4.15.0-1097.104
USN-4890-1	16.04 (Xenial) on src	linux-image-gcp	launchpad.net/ubuntu/+source/linux-aws/4.15.0-1097.104
USN-4890-1	16.04 (Xenial) on src	linux-image-generic-hwe-16.04	launchpad.net/ubuntu/+source/linux-aws/4.15.0-1097.104
USN-4890-1	16.04 (Xenial) on src	linux-image-generic-lpae-hwe-16.04	launchpad.net/ubuntu/+source/linux-aws/4.15.0-1097.104
USN-4890-1	16.04 (Xenial) on src	linux-image-gke	launchpad.net/ubuntu/+source/linux-aws/4.15.0-1097.104
USN-4890-1	16.04 (Xenial) on src	linux-image-lowlatency-hwe-16.04	launchpad.net/ubuntu/+source/linux-aws/4.15.0-1097.104
USN-4890-1	16.04 (Xenial) on src	linux-image-oem	launchpad.net/ubuntu/+source/linux-aws/4.15.0-1097.104
USN-4890-1	16.04 (Xenial) on src	linux-image-oracle	launchpad.net/ubuntu/+source/linux-aws/4.15.0-1097.104
USN-4890-1	16.04 (Xenial) on src	linux-image-virtual-hwe-16.04	launchpad.net/ubuntu/+source/linux-aws/4.15.0-1097.104
USN-4890-1	18.04 (bionic) on src	linux-image-4.15.0-1015-dell300x	launchpad.net/ubuntu/+source/linux/4.15.0-140.144
USN-4890-1	18.04 (bionic) on src	linux-image-4.15.0-1068-oracle	launchpad.net/ubuntu/+source/linux/4.15.0-140.144
USN-4890-1	18.04 (bionic) on src	linux-image-4.15.0-1088-kvm	launchpad.net/ubuntu/+source/linux/4.15.0-140.144
USN-4890-1	18.04 (bionic) on src	linux-image-4.15.0-1096-gcp	launchpad.net/ubuntu/+source/linux/4.15.0-140.144
USN-4890-1	18.04 (bionic) on src	linux-image-4.15.0-1097-aws	launchpad.net/ubuntu/+source/linux/4.15.0-140.144
USN-4890-1	18.04 (bionic) on src	linux-image-4.15.0-1099-snapdragon	launchpad.net/ubuntu/+source/linux/4.15.0-140.144
USN-4890-1	18.04 (bionic) on src	linux-image-4.15.0-1111-azure	launchpad.net/ubuntu/+source/linux/4.15.0-140.144
USN-4890-1	18.04 (bionic) on src	linux-image-4.15.0-140-generic	launchpad.net/ubuntu/+source/linux/4.15.0-140.144
USN-4890-1	18.04 (bionic) on src	linux-image-4.15.0-140-generic-lpae	launchpad.net/ubuntu/+source/linux/4.15.0-140.144
USN-4890-1	18.04 (bionic) on src	linux-image-4.15.0-140-lowlatency	launchpad.net/ubuntu/+source/linux/4.15.0-140.144
USN-4890-1	18.04 (bionic) on src	linux-image-aws-lts-18.04	launchpad.net/ubuntu/+source/linux/4.15.0-140.144
USN-4890-1	18.04 (bionic) on src	linux-image-azure-lts-18.04	launchpad.net/ubuntu/+source/linux/4.15.0-140.144
USN-4890-1	18.04 (bionic) on src	linux-image-dell300x	launchpad.net/ubuntu/+source/linux/4.15.0-140.144
USN-4890-1	18.04 (bionic) on src	linux-image-gcp-lts-18.04	launchpad.net/ubuntu/+source/linux/4.15.0-140.144
USN-4890-1	18.04 (bionic) on src	linux-image-generic	launchpad.net/ubuntu/+source/linux/4.15.0-140.144
USN-4890-1	18.04 (bionic) on src	linux-image-generic-lpae	launchpad.net/ubuntu/+source/linux/4.15.0-140.144
USN-4890-1	18.04 (bionic) on src	linux-image-kvm	launchpad.net/ubuntu/+source/linux/4.15.0-140.144
USN-4890-1	18.04 (bionic) on src	linux-image-lowlatency	launchpad.net/ubuntu/+source/linux/4.15.0-140.144
USN-4890-1	18.04 (bionic) on src	linux-image-oracle-lts-18.04	launchpad.net/ubuntu/+source/linux/4.15.0-140.144
USN-4890-1	18.04 (bionic) on src	linux-image-powerpc-e500mc	launchpad.net/ubuntu/+source/linux/4.15.0-140.144
USN-4890-1	18.04 (bionic) on src	linux-image-powerpc-smp	launchpad.net/ubuntu/+source/linux/4.15.0-140.144
USN-4890-1	18.04 (bionic) on src	linux-image-powerpc64-emb	launchpad.net/ubuntu/+source/linux/4.15.0-140.144
USN-4890-1	18.04 (bionic) on src	linux-image-powerpc64-smp	launchpad.net/ubuntu/+source/linux/4.15.0-140.144
USN-4890-1	18.04 (bionic) on src	linux-image-snapdragon	launchpad.net/ubuntu/+source/linux/4.15.0-140.144
USN-4890-1	18.04 (bionic) on src	linux-image-virtual	launchpad.net/ubuntu/+source/linux/4.15.0-140.144

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