Exploited
high
7.8
CWE
416 415
Advisory Published
CVE Published
Advisory Published
Updated

CVE-2024-1086: Fixes in Linux Kernel

First published: Wed Jan 31 2024(Updated: )

A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation. The nft_verdict_init() function allows positive values as drop error within the hook verdict, and hence the nf_hook_slow() function can cause a double free vulnerability when NF_DROP is issued with a drop error which resembles NF_ACCEPT. We recommend upgrading past commit f342de4e2f33e0e39165d8639387aa6c19dff660.

Credit: cve-coordination@google.com cve-coordination@google.com

Affected SoftwareAffected VersionHow to fix
IBM QRadar SIEM<=7.5 - 7.5.0 UP8 IF01
Linux Linux kernel>=3.15<5.15.149
Linux Linux kernel>=6.1<6.1.76
Linux Linux kernel>=6.2<6.6.15
Linux Linux kernel>=6.7<6.7.3
Linux Linux kernel=6.8-rc1
Fedoraproject Fedora=39
Redhat Enterprise Linux Desktop=7.0
Redhat Enterprise Linux For Ibm Z Systems=7.0_s390x
Redhat Enterprise Linux For Power Big Endian=7.0_ppc64
Redhat Enterprise Linux For Power Little Endian=7.0_ppc64le
Redhat Enterprise Linux Server=7.0
Redhat Enterprise Linux Workstation=7.0
Debian Debian Linux=10.0
All of
Netapp A250 Firmware
Netapp A250
All of
Netapp 500f Firmware
Netapp 500f
All of
Netapp C250 Firmware
Netapp C250
Linux kernel
F5 F5OS-A=1.7.0>=1.5.0<=1.5.2
1.8.0
F5 F5OS-C>=1.6.0<=1.6.2>=1.5.0<=1.5.1
redhat/kernel<6.8
6.8
debian/linux
5.10.223-1
5.10.226-1
6.1.115-1
6.1.119-1
6.11.10-1
6.12.5-1

Remedy

http://www.openwall.com/lists/oss-security/2024/04/10/22

Remedy

http://www.openwall.com/lists/oss-security/2024/04/10/23

Remedy

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f342de4e2f33e0e39165d8639387aa6c19dff660

Remedy

https://kernel.dance/f342de4e2f33e0e39165d8639387aa6c19dff660

Remedy

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

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

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