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CVE-2021-42008

Status Candidate

Overview

The decode_data function in drivers/net/hamradio/6pack.c in the Linux kernel before 5.13.13 has a slab out-of-bounds write. Input from a process that has the CAP_NET_ADMIN capability can lead to root access.

Related Files

Ubuntu Security Notice USN-5299-1
Posted Feb 22, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5299-1 - 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. It was discovered that the bluetooth subsystem in the Linux kernel did not properly perform access control. An authenticated attacker could possibly use this to expose sensitive information.

tags | advisory, kernel
systems | linux, ubuntu
advisories | CVE-2020-26147, CVE-2021-28972, CVE-2021-33034, CVE-2021-34693, CVE-2021-3483, CVE-2021-3564, CVE-2021-3612, CVE-2021-3679, CVE-2021-38204, CVE-2021-42008, CVE-2021-45485
SHA-256 | d8a0dffe787d4a58d1bd2849d246c1906fbde64a802ac79bc4262f763d9501ef
Ubuntu Security Notice USN-5116-2
Posted Oct 22, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5116-2 - It was discovered that a race condition existed in the Atheros Ath9k WiFi driver in the Linux kernel. An attacker could possibly use this to expose sensitive information. Alois Wohlschlager discovered that the overlay file system in the Linux kernel did not restrict private clones in some situations. An attacker could use this to expose sensitive information. It was discovered that the KVM hypervisor implementation in the Linux kernel did not properly compute the access permissions for shadow pages in some situations. A local attacker could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2020-3702, CVE-2021-3732, CVE-2021-38198, CVE-2021-38205, CVE-2021-40490, CVE-2021-42008
SHA-256 | bb413440af0aa8dceb1eaf38175be7d5c9ca2e29eb72383441a3801aa860047d
Ubuntu Security Notice USN-5116-1
Posted Oct 21, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5116-1 - It was discovered that a race condition existed in the Atheros Ath9k WiFi driver in the Linux kernel. An attacker could possibly use this to expose sensitive information. Alois Wohlschlager discovered that the overlay file system in the Linux kernel did not restrict private clones in some situations. An attacker could use this to expose sensitive information. It was discovered that the KVM hypervisor implementation in the Linux kernel did not properly compute the access permissions for shadow pages in some situations. A local attacker could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2020-3702, CVE-2021-3732, CVE-2021-38198, CVE-2021-38205, CVE-2021-40490, CVE-2021-42008
SHA-256 | 624673c2f26953a8ada3fd0b2a79cf84833b1595f649fda17da9e389c9afb9be
Ubuntu Security Notice USN-5115-1
Posted Oct 21, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5115-1 - It was discovered that a race condition existed in the Atheros Ath9k WiFi driver in the Linux kernel. An attacker could possibly use this to expose sensitive information. Ofek Kirzner, Adam Morrison, Benedict Schlueter, and Piotr Krysiuk discovered that the BPF verifier in the Linux kernel missed possible mispredicted branches due to type confusion, allowing a side-channel attack. An attacker could use this to expose sensitive information. Various other issues were also addressed.

tags | advisory, kernel
systems | linux, ubuntu
advisories | CVE-2020-3702, CVE-2021-33624, CVE-2021-34556, CVE-2021-35477, CVE-2021-3679, CVE-2021-37159, CVE-2021-3732, CVE-2021-3739, CVE-2021-3743, CVE-2021-3753, CVE-2021-3759, CVE-2021-38166, CVE-2021-38204, CVE-2021-38205, CVE-2021-40490, CVE-2021-42008
SHA-256 | 123e5f4aa3de879d935abfb080a9134445af106fa262a01d71265623b346525a
Ubuntu Security Notice USN-5114-1
Posted Oct 21, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5114-1 - It was discovered that a race condition existed in the Atheros Ath9k WiFi driver in the Linux kernel. An attacker could possibly use this to expose sensitive information. It was discovered that the KVM hypervisor implementation in the Linux kernel did not properly compute the access permissions for shadow pages in some situations. A local attacker could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2020-3702, CVE-2021-38198, CVE-2021-40490, CVE-2021-42008
SHA-256 | ceee63f51059c725b70a515fe8119b33ddc4422809941ce8a057f099681ff444
Ubuntu Security Notice USN-5113-1
Posted Oct 20, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5113-1 - It was discovered that a race condition existed in the Atheros Ath9k WiFi driver in the Linux kernel. An attacker could possibly use this to expose sensitive information. Alois Wohlschlager discovered that the overlay file system in the Linux kernel did not restrict private clones in some situations. An attacker could use this to expose sensitive information. It was discovered that the btrfs file system in the Linux kernel did not properly handle removing a non-existent device id. An attacker with CAP_SYS_ADMIN could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel
systems | linux, ubuntu
advisories | CVE-2020-3702, CVE-2021-3732, CVE-2021-3739, CVE-2021-3743, CVE-2021-3753, CVE-2021-38166, CVE-2021-40490, CVE-2021-42008
SHA-256 | 5b77b651661b26b5ddee110193bf60874290434159ecf99d6501028d96ace712
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