CVE-2023-0461
There is a use-after-free vulnerability in the Linux Kernel which can be exploited to achieve local privilege escalation.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.65%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.65% probability · 49th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel
- Source
- cve-coordination@google.com
References
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2c02d41d71f90a5168391b6a5f2954112ba2307cMailing List, Patch
- https://kernel.dance/#2c02d41d71f90a5168391b6a5f2954112ba2307cPatch
- https://lists.debian.org/debian-lts-announce/2023/05/msg00005.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/05/msg00006.htmlThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2c02d41d71f90a5168391b6a5f2954112ba2307cMailing List, Patch
- https://kernel.dance/#2c02d41d71f90a5168391b6a5f2954112ba2307cPatch
- https://lists.debian.org/debian-lts-announce/2023/05/msg00005.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/05/msg00006.htmlThird Party Advisory
- https://security.netapp.com/advisory/ntap-20230331-0006/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.