CVE-2015-2686

Severity: high (CVSS 7.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2016-05-02 · updated 2026-06-17
Weakness: CWE-264

Description

net/socket.c in the Linux kernel 3.19 before 3.19.3 does not validate certain range data for (1) sendto and (2) recvfrom system calls, which allows local users to gain privileges by leveraging a subsystem that uses the copy_from_iter function in the iov_iter interface, as demonstrated by the Bluetooth subsystem.

Affected products

Linux kernel: 3.19, 3.19.1, 3.19.2

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4de930efc23b92ddf88ce91c405ee645fe6e27ea
http://grsecurity.net/~spender/viro.txt
http://twitter.com/grsecurity/statuses/579050211605102592
http://twitter.com/grsecurity/statuses/579060953477701632
http://twitter.com/grsecurity/statuses/579075689439059968
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.19.3
http://www.openwall.com/lists/oss-security/2015/03/23/14
http://www.securityfocus.com/bid/73286
https://bugzilla.redhat.com/show_bug.cgi?id=1205242
https://github.com/torvalds/linux/commit/4de930efc23b92ddf88ce91c405ee645fe6e27ea
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4de930efc23b92ddf88ce91c405ee645fe6e27ea
http://grsecurity.net/~spender/viro.txt

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