What’s Vulnerable › Vulnerabilities

CVE-2017-9985

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-06-28 · updated 2026-06-17
• Weakness: CWE-125

Description

The snd_msndmidi_input_read function in sound/isa/msnd/msnd_midi.c in the Linux kernel through 4.11.7 allows local users to cause a denial of service (over-boundary access) or possibly have unspecified other impact by changing the value of a message queue head pointer between two kernel reads of that value, aka a "double fetch" vulnerability.

Affected products

• Canonical Ubuntu Linux: 14.04
• Linux kernel: before 3.18.71; from 3.19 before 4.1.45; from 4.2 before 4.4.88; from 4.5 before 4.9.50; from 4.10 before 4.12.13 — fixed in 3.18.71, 4.1.45, 4.12.13, 4.4.88, 4.9.50

How to fix

Upgrade to a fixed version: Linux kernel 3.18.71, 4.1.45, 4.12.13, 4.4.88. Check the vendor advisory for mitigations.

References

• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=20e2b791796bd68816fa115f12be5320de2b8021
• http://www.securityfocus.com/bid/99335
• https://bugzilla.kernel.org/show_bug.cgi?id=196133
• https://github.com/torvalds/linux/commit/20e2b791796bd68816fa115f12be5320de2b8021
• https://usn.ubuntu.com/3754-1/
• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=20e2b791796bd68816fa115f12be5320de2b8021
• http://www.securityfocus.com/bid/99335
• https://bugzilla.kernel.org/show_bug.cgi?id=196133
• https://github.com/torvalds/linux/commit/20e2b791796bd68816fa115f12be5320de2b8021
• https://usn.ubuntu.com/3754-1/

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