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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-43458 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: serial: caif: hold tty->link reference in ldisc_open and ser_release A reproducer triggers a KASAN slab-use-after-free in pty_write_room() when caif_serial's TX path calls tty_write_room(). The faulting access is on tty->link->port. Hold an extra kref on tty->link for the lifetime of the caif_serial line discipline: get it in ldisc_open() and drop it in ser_release(), and also drop it on the ldisc_open() error path. With this change applied, the reproducer no longer triggers the UAF in my testing.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/23a3ac2e2262a291498567418227b99e1f3606b1 kernel.org Patch 
https://git.kernel.org/stable/c/27e43356d0defb9fc7fa25265219a3ffeb7b3e98 kernel.org Patch 
https://git.kernel.org/stable/c/288598d80a068a0e9281de35bcb4ce495f189e2a kernel.org Patch 
https://git.kernel.org/stable/c/35b58d3bc716ebb9ebd10fe1cac8c1177242511c kernel.org Patch 
https://git.kernel.org/stable/c/52135420e9f75853ea0c6cea7b736e3e98495f7d kernel.org Patch 
https://git.kernel.org/stable/c/8460187b4852fd00bd1c76394358053f3fa4d089 kernel.org Patch 
https://git.kernel.org/stable/c/97a0bb491cae39478c6225381f14e9ac67b7bba7 kernel.org Patch 
https://git.kernel.org/stable/c/ca2ceba983bb23ea0202c2882d963253416654a3 kernel.org Patch 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-416 Use After Free cwe source acceptance level NIST  

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Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-43458
NVD Published Date:
05/08/2026
NVD Last Modified:
05/21/2026
Source:
kernel.org