Use After Free Affecting kernel-rt-devel package, versions <0:5.14.0-284.11.1.rt14.296.el9_2
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Test your applications- Snyk ID SNYK-ALMALINUX9-KERNELRTDEVEL-5622451
- published 28 May 2023
- disclosed 9 May 2023
Introduced: 9 May 2023
CVE-2023-0461 Open this link in a new tabHow to fix?
Upgrade AlmaLinux:9
kernel-rt-devel
to version 0:5.14.0-284.11.1.rt14.296.el9_2 or higher.
This issue was patched in ALSA-2023:2148
.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-rt-devel
package and not the kernel-rt-devel
package as distributed by AlmaLinux
.
See How to fix?
for AlmaLinux:9
relevant fixed versions and status.
There is a use-after-free vulnerability in the Linux Kernel which can be exploited to achieve local privilege escalation. To reach the vulnerability kernel configuration flag CONFIG_TLS or CONFIG_XFRM_ESPINTCP has to be configured, but the operation does not require any privilege.
There is a use-after-free bug of icsk_ulp_data of a struct inet_connection_sock.
When CONFIG_TLS is enabled, user can install a tls context (struct tls_context) on a connected tcp socket. The context is not cleared if this socket is disconnected and reused as a listener. If a new socket is created from the listener, the context is inherited and vulnerable.
The setsockopt TCP_ULP operation does not require any privilege.
We recommend upgrading past commit 2c02d41d71f90a5168391b6a5f2954112ba2307c
References
- https://errata.almalinux.org/9/ALSA-2023-2148.html
- https://errata.almalinux.org/9/ALSA-2023-2458.html
- https://errata.almalinux.org/8/ALSA-2023-2736.html
- https://errata.almalinux.org/8/ALSA-2023-2951.html
- https://access.redhat.com/security/cve/CVE-2023-0461
- https://access.redhat.com/errata/RHSA-2023:2148
- https://access.redhat.com/errata/RHSA-2023:2458
- https://access.redhat.com/errata/RHSA-2023:2736
- https://access.redhat.com/errata/RHSA-2023:2951
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2c02d41d71f90a5168391b6a5f2954112ba2307c
- https://kernel.dance/#2c02d41d71f90a5168391b6a5f2954112ba2307c
- https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html
- https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html