CVE-2016-7912

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2016-11-16 · updated 2026-06-17
Weakness: CWE-416

Description

Use-after-free vulnerability in the ffs_user_copy_worker function in drivers/usb/gadget/function/f_fs.c in the Linux kernel before 4.5.3 allows local users to gain privileges by accessing an I/O data structure after a certain callback call.

Affected products

Linux kernel: from 3.15 before 3.16.40; from 3.17 before 4.1.24; from 4.2 before 4.4.9; from 4.5 before 4.5.3 — fixed in 3.16.40, 4.1.24, 4.4.9, 4.5.3

How to fix

Upgrade to a fixed version: Linux kernel 3.16.40, 4.1.24, 4.4.9, 4.5.3. Check the vendor advisory for mitigations.

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=38740a5b87d53ceb89eb2c970150f6e94e00373a
http://source.android.com/security/bulletin/2016-11-01.html
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.3
http://www.securityfocus.com/bid/94197
https://github.com/torvalds/linux/commit/38740a5b87d53ceb89eb2c970150f6e94e00373a
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=38740a5b87d53ceb89eb2c970150f6e94e00373a
http://source.android.com/security/bulletin/2016-11-01.html
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.3
http://www.securityfocus.com/bid/94197
https://github.com/torvalds/linux/commit/38740a5b87d53ceb89eb2c970150f6e94e00373a

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