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debian/linuxFixes in Linux Kernel

Risk 72
Severity
7.8
Use After Free
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

A flaw in the Linux Kernel found. For the netfilter, nftablesnewrule when adding a rule with NFTARULECHAINID can lead to use-after-free.

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0ebc1064e4874d5987722a2ddbc18f94aa53b211

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Source: Red Hat
First published (updated )
CVE-2023-4147

redhat/kernelKernel: vmwgfx: reference count issue leads to use-after-free in surface handling

Risk 53
Severity
7.8
EPSS
0.01%
Use After Free
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Last updated 30 August 2024

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Source: Ubuntu
First published (updated )
CVE-2023-5633

redhat/kernelBuffer Overflow, Integer Overflow

Risk 73
Severity
7.8
Buffer Overflow, Integer Overflow
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

A buffer overflow vulnerability was found in the Netfilter subsystem in the Linux Kernel. This issue could allow the leakage of both stack and heap addresses, and potentially allow Local Privilege Escalation to the root user via arbitrary code execution.

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Remedy

This flaw can be mitigated by disabling unprivileged user namespaces will prevent exploitation: ~~~ sysctl -w kernel.unprivileged_userns_clone = 0 ~~~

Remedy

If not needed, disable the ability for unprivileged users to create namespaces. To do this temporarily, do: sudo sysctl -w kernel.unprivileged_userns_clone=0 To disable across reboots, do: echo kernel.unprivileged_userns_clone=0 | \ sudo tee /etc/sysctl.d/99-disable-unpriv-userns.conf
First published (updated )
CVE-2023-0179

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