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Linux kernel vulnerabilities

Description

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) Kiyin (尹亮) discovered that the NFC LLCP protocol implementation in the Linux kernel contained a reference counting error. A local attacker could use this to cause a denial of service (system crash). (CVE-2020-25670) Kiyin (尹亮) discovered that the NFC LLCP protocol implementation in the Linux kernel did not properly deallocate memory in certain error situations. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2020-25671, CVE-2020-25672) Kiyin (尹亮) discovered that the NFC LLCP protocol implementation in the Linux kernel did not properly handle error conditions in some situations, leading to an infinite loop. A local attacker could use this to cause a denial of service. (CVE-2020-25673) 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) Piotr Krysiuk and Benedict Schlueter discovered that the eBPF implementation in the Linux kernel performed out of bounds speculation on pointer arithmetic. A local attacker could use this to expose sensitive information. (CVE-2021-29155) 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)


Affected Package


OS OS Version Package Name Package Version
Ubuntu 20.10 linux-image-5.8.0-59-lowlatency 5.8.0-59.66
Ubuntu 20.10 linux-image-5.8.0-1029-raspi 5.8.0-1029.32
Ubuntu 20.10 linux-image-5.8.0-1038-aws 5.8.0-1038.40
Ubuntu 20.10 linux-image-oracle 5.8.0.1033.32
Ubuntu 20.10 linux-image-azure 5.8.0.1036.36
Ubuntu 20.10 linux-image-raspi-nolpae 5.8.0.1029.31
Ubuntu 20.10 linux-image-5.8.0-59-generic-64k 5.8.0-59.66
Ubuntu 20.10 linux-image-5.8.0-59-generic-lpae 5.8.0-59.66
Ubuntu 20.10 linux-image-virtual 5.8.0.59.64
Ubuntu 20.10 linux-image-raspi 5.8.0.1029.31
Ubuntu 20.10 linux-image-gke 5.8.0.1035.35
Ubuntu 20.10 linux-image-generic-64k 5.8.0.59.64
Ubuntu 20.10 linux-image-generic 5.8.0.59.64
Ubuntu 20.10 linux-image-5.8.0-1036-azure 5.8.0-1036.38
Ubuntu 20.10 linux-image-5.8.0-1033-oracle 5.8.0-1033.34
Ubuntu 20.10 linux-image-aws 5.8.0.1038.40
Ubuntu 20.10 linux-image-kvm 5.8.0.1030.32
Ubuntu 20.10 linux-image-5.8.0-1030-kvm 5.8.0-1030.32
Ubuntu 20.10 linux-image-generic-lpae 5.8.0.59.64
Ubuntu 20.10 linux-image-gcp 5.8.0.1035.35
Ubuntu 20.10 linux-image-5.8.0-1029-raspi-nolpae 5.8.0-1029.32
Ubuntu 20.10 linux-image-5.8.0-1035-gcp 5.8.0-1035.37
Ubuntu 20.10 linux-image-5.8.0-59-generic 5.8.0-59.66
Ubuntu 20.10 linux-image-lowlatency 5.8.0.59.64
Ubuntu 20.04 linux-image-virtual-hwe-20.04 5.8.0.59.66~20.04.42
Ubuntu 20.04 linux-image-5.8.0-59-generic-64k 5.8.0-59.66~20.04.1
Ubuntu 20.04 linux-image-5.8.0-59-lowlatency 5.8.0-59.66~20.04.1
Ubuntu 20.04 linux-image-generic-lpae-hwe-20.04 5.8.0.59.66~20.04.42
Ubuntu 20.04 linux-image-5.8.0-59-generic 5.8.0-59.66~20.04.1
Ubuntu 20.04 linux-image-gcp 5.8.0.1035.37~20.04.9
Ubuntu 20.04 linux-image-generic-64k-hwe-20.04 5.8.0.59.66~20.04.42
Ubuntu 20.04 linux-image-5.8.0-1036-azure 5.8.0-1036.38~20.04.1
Ubuntu 20.04 linux-image-5.8.0-1033-oracle 5.8.0-1033.34~20.04.1
Ubuntu 20.04 linux-image-lowlatency-hwe-20.04 5.8.0.59.66~20.04.42
Ubuntu 20.04 linux-image-5.8.0-1035-gcp 5.8.0-1035.37~20.04.1
Ubuntu 20.04 linux-image-aws 5.8.0.1038.40~20.04.11
Ubuntu 20.04 linux-image-generic-hwe-20.04 5.8.0.59.66~20.04.42
Ubuntu 20.04 linux-image-5.8.0-1038-aws 5.8.0-1038.40~20.04.1
Ubuntu 20.04 linux-image-5.8.0-59-generic-lpae 5.8.0-59.66~20.04.1
Ubuntu 20.04 linux-image-oracle 5.8.0.1033.34~20.04.9
Ubuntu 20.04 linux-image-azure 5.8.0.1036.38~20.04.8

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