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High USN-5830-1 4 CVEs

linux-azure, linux-azure-5.4, linux-raspi2 vulnerabilities

Published Jan 27, 2023 · Updated Oct 22, 2026

Ecosystem: Ubuntu

Summary

It was discovered that the NFSD implementation in the Linux kernel did not
properly handle some RPC messages, leading to a buffer overflow. A remote
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2022-43945)

Tamás Koczka discovered that the Bluetooth L2CAP handshake implementation
in the Linux kernel contained multiple use-after-free vulnerabilities. A
physically proximate attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2022-42896)

It was discovered that the Xen netback driver in the Linux kernel did not
properly handle packets structured in certain ways. An attacker in a guest
VM could possibly use this to cause a denial of service (host NIC
availability). (CVE-2022-3643)

It was discovered that an integer overflow vulnerability existed in the
Bluetooth subsystem in the Linux kernel. A physically proximate attacker
could use this to cause a denial of service (system crash).
(CVE-2022-45934)

Fixed packages 3

ReleasePackageFixed in
Ubuntu · 18.04 LTS 18.04:LTS linux-azure-5.4 5.4.0-1101.107~18.04.1
Ubuntu · 18.04 LTS 18.04:LTS linux-raspi2 4.15.0-1126.134
Ubuntu · 20.04 LTS 20.04:LTS linux-azure 5.4.0-1101.107

Vulnerabilities 4

References

  • report
    https://ubuntu.com/security/CVE-2022-3643
  • report
    https://ubuntu.com/security/CVE-2022-42896
  • report
    https://ubuntu.com/security/CVE-2022-43945
  • report
    https://ubuntu.com/security/CVE-2022-45934