Some vulnerabilities have been reported in the Linux kernel, which can be exploited by malicious, local users and potentially malicious people to cause a DoS (Denial of Service).
1) An error within the handling of keyrings makes it possible to crash the kernel when destroying a keyring that wasn't properly instantiated. This can be exploited by attempting to add a keyring that doesn't have an empty payload.
2) An error within the error handling path for the "KEYCTL_JOIN_SESSION_KEYRING" operation when attempting to join a key management session may cause the session management semaphore to not be released. This can be exploited by attempting to add a new session keyring.
3) Some errors in the in-kernel zlib routines can be exploited to cause a DoS via specially crafted input.
4) An error in the driver for compressed ISO file systems can be exploited to crash the kernel when e.g. a malicious CD-ROM with a specially crafted compressed ISO image is mounted.
5) A array type error in the "ipt_recent.c" netfilter module when calling "memset()" on the "last_pkts" array may cause the kernel to crash via certain attacks. e.g. SSH brute force. This only affects 64-bit platforms.
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Subject: Linux Kernel Multiple Denial of Service Vulnerabilities
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