Some vulnerabilities have been reported in the Linux Kernel, which can be exploited by malicious, local users to cause a DoS (Denial of Service), disclose sensitive information, and potentially gain escalated privileges.
1) An error exists within the "keyctl_session_to_parent()" function in security/keys/keyctl.c, which can be exploited to cause a NULL pointer dereference by e.g. calling "keyctl()" with KEYCTL_SESSION_TO_PARENT.
Note: Successful exploitation may require that the distribution does not use pam_keyinit.
2) A use-after-free error exists within the "snd_seq_oss_open()" function in sound/core/seq/oss/seq_oss_init.c, which can be exploited to e.g. cause a kernel crash.
Note: Successful exploitation may require access to the sequencer device.
3) The "mos7720_ioctl()" function in drivers/usb/serial/mos7720.c, the "mos7840_ioctl()" function in drivers/usb/serial/mos7840.c, and the "viafb_ioctl_get_viafb_info()" function in drivers/video/via/ioctl.c are not properly initializing all members of certain structures before copying them to userspace, which can be exploited to disclose kernel stack memory by sending certain IOCTLs.
Solution: Update to version 126.96.36.199 or 188.8.131.52.
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Subject: Linux Kernel Multiple Vulnerabilities
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