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.
References
Configurations
Configuration 1 (hide)
|
History
21 May 2026, 16:47
| Type | Values Removed | Values Added |
|---|---|---|
| CWE | CWE-416 | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.8 |
| References | () https://git.kernel.org/stable/c/23a3ac2e2262a291498567418227b99e1f3606b1 - Patch | |
| References | () https://git.kernel.org/stable/c/27e43356d0defb9fc7fa25265219a3ffeb7b3e98 - Patch | |
| References | () https://git.kernel.org/stable/c/288598d80a068a0e9281de35bcb4ce495f189e2a - Patch | |
| References | () https://git.kernel.org/stable/c/35b58d3bc716ebb9ebd10fe1cac8c1177242511c - Patch | |
| References | () https://git.kernel.org/stable/c/52135420e9f75853ea0c6cea7b736e3e98495f7d - Patch | |
| References | () https://git.kernel.org/stable/c/8460187b4852fd00bd1c76394358053f3fa4d089 - Patch | |
| References | () https://git.kernel.org/stable/c/97a0bb491cae39478c6225381f14e9ac67b7bba7 - Patch | |
| References | () https://git.kernel.org/stable/c/ca2ceba983bb23ea0202c2882d963253416654a3 - Patch | |
| First Time |
Linux linux Kernel
Linux |
|
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* |
08 May 2026, 15:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-08 15:16
Updated : 2026-05-21 16:47
NVD link : CVE-2026-43458
Mitre link : CVE-2026-43458
CVE.ORG link : CVE-2026-43458
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-416
Use After Free