Description
Memory leak in the VFS file lease handling in locks.c in Linux kernels 2.6.10 to 2.6.15 allows local users to cause a denial of service (memory exhaustion) via certain Samba activities that cause an fasync entry to be re-allocated by the fcntl_setlease function after the fasync queue has already been cleaned by the locks_delete_lock function.
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- Linux Kernel 2.6.x - File Lock Lease Local Denial of Service EDB-26749 · dos · Dec 29, 2005 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- 17917 third-party-advisory
- SUSE-SA:2005:067 vendor-advisory
- http://kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=dc15ae14e97ee9d5ed740cbb0b94996076d8b37e
- 18203 third-party-advisory
- USN-231-1 vendor-advisory
- SUSE-SA:2005:068 vendor-advisory
- [linux-kernel] 20051113 [GIT] Fix memory leak in lease code mailing-list
- FLSA:157459-4 vendor-advisory
- TSLSA-2005-0070 vendor-advisory
- 17918 third-party-advisory
- 15745 vdb-entry