VDB
DEBIAN-CVE-2026-43458
DEBIAN-CVE-2026-43458
PUBLISHED
CVSS 8.600000381469727 HIGH
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.
Risk Scores
CVSS 4.0
8.600000381469727
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:14 | linux | 0, 6.12.38-1, 6.12.41-1 |
| Debian:11 | linux | 7.1, 6.1, 6.1 |
| Debian:13 | linux | 6.12.38-1, 6.12.41-1, 6.12.43-1 |
| Debian:12 | linux | 6.1.158-1, 6.1.159-1, 6.1.162-1 |
Timeline
- May 8, 2026 CVE Published
- May 9, 2026 CVE Updated