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Unscored USN-6454-2 0 CVEs

linux-aws, linux-azure, linux-gcp, linux-oracle, linux-raspi vulnerabilities

Published Oct 30, 2023 · Updated Feb 4, 2026

Summary

Kyle Zeng discovered that the netfilter subsystem in the Linux kernel
contained a race condition in IP set operations in certain situations. A
local attacker could use this to cause a denial of service (system crash).
(CVE-2023-42756)

Alex Birnberg discovered that the netfilter subsystem in the Linux kernel
did not properly validate register length, leading to an out-of- bounds
write vulnerability. A local attacker could possibly use this to cause a
denial of service (system crash). (CVE-2023-4881)

It was discovered that the Quick Fair Queueing scheduler implementation in
the Linux kernel did not properly handle network packets in certain
conditions, leading to a use after free vulnerability. A local attacker
could use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2023-4921)

Kevin Rich discovered that the netfilter subsystem in the Linux kernel did
not properly handle removal of rules from chain bindings in certain
circumstances, leading to a use-after-free vulnerability. A local attacker
could possibly use this to cause a denial of service (system crash) or
execute arbitrary code. (CVE-2023-5197)

Fixed packages 5

ReleasePackageFixed in
Ubuntu · 23.10 linux-aws 6.5.0-1009.9
Ubuntu · 23.10 linux-azure 6.5.0-1008.8
Ubuntu · 23.10 linux-gcp 6.5.0-1008.8
Ubuntu · 23.10 linux-oracle 6.5.0-1011.11
Ubuntu · 23.10 linux-raspi 6.5.0-1006.8

References

  • report
    https://ubuntu.com/security/CVE-2023-4921
  • report
    https://ubuntu.com/security/CVE-2023-5197
  • report
    https://ubuntu.com/security/CVE-2023-42756