CVE-2021-46905
net: hso: fix NULL-deref on disconnect regression
Vexday Risk Score
3Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS —EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
25 Feb 2024Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
In the Linux kernel, the following vulnerability has been resolved:
net: hso: fix NULL-deref on disconnect regression
Commit 8a12f8836145 ("net: hso: fix null-ptr-deref during tty device
unregistration") fixed the racy minor allocation reported by syzbot, but
introduced an unconditional NULL-pointer dereference on every disconnect
instead.
Specifically, the serial device table must no longer be accessed after
the minor has been released by hso_serial_tty_unregister().
Affected products
Linux · LinuxWant to know if your infrastructure is exposed to this?
Talk to TrueHacking →References
https://git.kernel.org/stable/c/0c71d4c89559f72cec2592d078681a843bce570ehttps://git.kernel.org/stable/c/0f000005da31f6947f843ce6b3e3a960540c6e00https://git.kernel.org/stable/c/24b699bea7553fc0b98dad9d864befb6005ac7f1https://git.kernel.org/stable/c/2ad5692db72874f02b9ad551d26345437ea4f7f3https://git.kernel.org/stable/c/41c44e1f3112d7265dae522c026399b2a42d19efhttps://git.kernel.org/stable/c/5871761c5f0f20d6e98bf3b6bd7486d857589554https://git.kernel.org/stable/c/5c17cfe155d21954b4c7e2a78fa771cebcd86725https://git.kernel.org/stable/c/90642ee9eb581a13569b1c0bd57e85d962215273https://git.kernel.org/stable/c/d7fad2ce15bdbbd0fec3ebe999fd7cab2267f53e