CVE-2016-9313

security/keys/big_key.c in the Linux kernel before 4.8.7 mishandles unsuccessful crypto registration in conjunction with successful key-type registration, which allows local users to cause a denial of service (NULL pointer dereference and panic) or possibly have unspecified other impact via a crafted application that uses the big_key data type.

Weakness

A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit.

Affected Software

Potential Mitigations

References

• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=7df3e59c3d1df4f87fe874c7956ef7a3d2f4d5fb
• http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.7
• http://www.openwall.com/lists/oss-security/2016/07/22/1
• http://www.securityfocus.com/bid/94546
• https://github.com/torvalds/linux/commit/7df3e59c3d1df4f87fe874c7956ef7a3d2f4d5fb
• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=7df3e59c3d1df4f87fe874c7956ef7a3d2f4d5fb
• http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.7
• http://www.openwall.com/lists/oss-security/2016/07/22/1
• http://www.securityfocus.com/bid/94546
• https://github.com/torvalds/linux/commit/7df3e59c3d1df4f87fe874c7956ef7a3d2f4d5fb