First published: Wed Jun 23 2021(Updated: )
Norbert Slusarek discovered a race condition in the CAN BCM networking protocol of the Linux kernel leading to multiple use-after-free vulnerabilities. A local attacker could use this issue to execute arbitrary code. (CVE-2021-3609) Piotr Krysiuk discovered that the eBPF implementation in the Linux kernel did not properly enforce limits for pointer operations. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-33200) Mathy Vanhoef discovered that the Linux kernel’s WiFi implementation did not properly clear received fragments from memory in some situations. A physically proximate attacker could possibly use this issue to inject packets or expose sensitive information. (CVE-2020-24586) Mathy Vanhoef discovered that the Linux kernel’s WiFi implementation incorrectly handled encrypted fragments. A physically proximate attacker could possibly use this issue to decrypt fragments. (CVE-2020-24587) Mathy Vanhoef discovered that the Linux kernel’s WiFi implementation incorrectly handled certain malformed frames. If a user were tricked into connecting to a malicious server, a physically proximate attacker could use this issue to inject packets. (CVE-2020-24588) Mathy Vanhoef discovered that the Linux kernel’s WiFi implementation incorrectly handled EAPOL frames from unauthenticated senders. A physically proximate attacker could inject malicious packets to cause a denial of service (system crash). (CVE-2020-26139) Mathy Vanhoef discovered that the Linux kernel’s WiFi implementation did not properly verify certain fragmented frames. A physically proximate attacker could possibly use this issue to inject or decrypt packets. (CVE-2020-26141) Mathy Vanhoef discovered that the Linux kernel’s WiFi implementation accepted plaintext fragments in certain situations. A physically proximate attacker could use this issue to inject packets. (CVE-2020-26145) Mathy Vanhoef discovered that the Linux kernel’s WiFi implementation could reassemble mixed encrypted and plaintext fragments. A physically proximate attacker could possibly use this issue to inject packets or exfiltrate selected fragments. (CVE-2020-26147) Or Cohen discovered that the SCTP implementation in the Linux kernel contained a race condition in some situations, leading to a use-after-free condition. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-23133) Or Cohen and Nadav Markus discovered a use-after-free vulnerability in the nfc implementation in the Linux kernel. A privileged local attacker could use this issue to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-23134) Manfred Paul discovered that the extended Berkeley Packet Filter (eBPF) implementation in the Linux kernel contained an out-of-bounds vulnerability. A local attacker could use this issue to execute arbitrary code. (CVE-2021-31440) Piotr Krysiuk discovered that the eBPF implementation in the Linux kernel did not properly prevent speculative loads in certain situations. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2021-31829) It was discovered that a race condition in the kernel Bluetooth subsystem could lead to use-after-free of slab objects. An attacker could use this issue to possibly execute arbitrary code. (CVE-2021-32399) It was discovered that a use-after-free existed in the Bluetooth HCI driver of the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-33034) It was discovered that an out-of-bounds (OOB) memory access flaw existed in the f2fs module of the Linux kernel. A local attacker could use this issue to cause a denial of service (system crash). (CVE-2021-3506) Mathias Krause discovered that a null pointer dereference existed in the Nitro Enclaves kernel driver of the Linux kernel. A local attacker could use this issue to cause a denial of service or possibly execute arbitrary code. (CVE-2021-3543)
Affected Software | Affected Version | How to fix |
---|---|---|
All of | ||
ubuntu/linux-image-5.11.0-1012-raspi | <5.11.0-1012.13 | 5.11.0-1012.13 |
Ubuntu Ubuntu | =21.04 | |
All of | ||
ubuntu/linux-image-5.11.0-1010-oracle | <5.11.0-1010.10 | 5.11.0-1010.10 |
Ubuntu Ubuntu | =21.04 | |
All of | ||
ubuntu/linux-image-5.11.0-22-generic | <5.11.0-22.23 | 5.11.0-22.23 |
Ubuntu Ubuntu | =21.04 | |
All of | ||
ubuntu/linux-image-oracle | <5.11.0.1010.10 | 5.11.0.1010.10 |
Ubuntu Ubuntu | =21.04 | |
All of | ||
ubuntu/linux-image-azure | <5.11.0.1009.9 | 5.11.0.1009.9 |
Ubuntu Ubuntu | =21.04 | |
All of | ||
ubuntu/linux-image-5.11.0-22-generic-lpae | <5.11.0-22.23 | 5.11.0-22.23 |
Ubuntu Ubuntu | =21.04 | |
All of | ||
ubuntu/linux-image-raspi-nolpae | <5.11.0.1012.10 | 5.11.0.1012.10 |
Ubuntu Ubuntu | =21.04 | |
All of | ||
ubuntu/linux-image-5.11.0-1009-azure | <5.11.0-1009.9 | 5.11.0-1009.9 |
Ubuntu Ubuntu | =21.04 | |
All of | ||
ubuntu/linux-image-5.11.0-22-lowlatency | <5.11.0-22.23 | 5.11.0-22.23 |
Ubuntu Ubuntu | =21.04 | |
All of | ||
ubuntu/linux-image-virtual | <5.11.0.22.23 | 5.11.0.22.23 |
Ubuntu Ubuntu | =21.04 | |
All of | ||
ubuntu/linux-image-generic | <5.11.0.22.23 | 5.11.0.22.23 |
Ubuntu Ubuntu | =21.04 | |
All of | ||
ubuntu/linux-image-raspi | <5.11.0.1012.10 | 5.11.0.1012.10 |
Ubuntu Ubuntu | =21.04 | |
All of | ||
ubuntu/linux-image-gke | <5.11.0.1011.11 | 5.11.0.1011.11 |
Ubuntu Ubuntu | =21.04 | |
All of | ||
ubuntu/linux-image-generic-64k | <5.11.0.22.23 | 5.11.0.22.23 |
Ubuntu Ubuntu | =21.04 | |
All of | ||
ubuntu/linux-image-5.11.0-22-generic-64k | <5.11.0-22.23 | 5.11.0-22.23 |
Ubuntu Ubuntu | =21.04 | |
All of | ||
ubuntu/linux-image-5.11.0-1012-raspi-nolpae | <5.11.0-1012.13 | 5.11.0-1012.13 |
Ubuntu Ubuntu | =21.04 | |
All of | ||
ubuntu/linux-image-5.11.0-1011-gcp | <5.11.0-1011.12 | 5.11.0-1011.12 |
Ubuntu Ubuntu | =21.04 | |
All of | ||
ubuntu/linux-image-aws | <5.11.0.1011.11 | 5.11.0.1011.11 |
Ubuntu Ubuntu | =21.04 | |
All of | ||
ubuntu/linux-image-5.11.0-1011-aws | <5.11.0-1011.11 | 5.11.0-1011.11 |
Ubuntu Ubuntu | =21.04 | |
All of | ||
ubuntu/linux-image-generic-lpae | <5.11.0.22.23 | 5.11.0.22.23 |
Ubuntu Ubuntu | =21.04 | |
All of | ||
ubuntu/linux-image-gcp | <5.11.0.1011.11 | 5.11.0.1011.11 |
Ubuntu Ubuntu | =21.04 | |
All of | ||
ubuntu/linux-image-lowlatency | <5.11.0.22.23 | 5.11.0.22.23 |
Ubuntu Ubuntu | =21.04 |
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
(Contains the following vulnerabilities)
The vulnerability ID of this Linux kernel vulnerability is CVE-2021-3609.
The severity of the Linux kernel vulnerability (CVE-2021-3609) is not specified in the provided information. Please refer to the official sources for more details.
The affected software version for the Linux kernel vulnerability (CVE-2021-3609) is Linux kernel version 5.11.0-1012.13.
To fix the Linux kernel vulnerability (CVE-2021-3609), update to the remedied version 5.11.0-1012.13 of the Linux kernel.
You can find more information about the Linux kernel vulnerability (CVE-2021-3609) on the Ubuntu Security Notices website.