Entreprise française de cybersécurité depuis 2004
☎ 03 60 47 09 81 - info@securiteinfo.com
☎ 03 60 47 09 81 - info@securiteinfo.com
A use-after-free vulnerability in the Linux kernel's af_unix component can be exploited to achieve local privilege escalation.The unix_stream_sendpage() function tries to add data to the last skb in the peer's recv queue without locking the queue. Thus there is a race where unix_stream_sendpage() could access an skb locklessly that is being released by garbage collection, resulting in use-after-free.We recommend upgrading past commit 790c2f9d15b594350ae9bca7b236f2b1859de02c.
- http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html
- https://github.com/0range1337/CVE-CVE-2023-4622
- https://github.com/FreeXR/exploits
- https://github.com/nidhi7598/linux-4.19.72_net_CVE-2023-4622
- https://github.com/nomi-sec/PoC-in-GitHub