CVE-2017-9951

7.5 highEPSS 4.2%

The try_read_command function in memcached.c in memcached before 1.4.39 allows remote attackers to cause a denial of service (segmentation fault) via a request to add/set a key, which makes a comparison between signed and unsigned int and triggers a heap-based buffer over-read. NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-8705.

Severity

CVSS 3.0

7.5 high

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 4.2% chance of exploitation in the next 30 days; higher than 90% of CVEs (scores of 2026-10-31)
Published: 2017-07-17
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

memcached:memcached

References

http://www.securityfocus.com/bid/99874
https://github.com/memcached/memcached/wiki/ReleaseNotes1439
https://groups.google.com/forum/message/raw?msg=memcached/ubGWrkmrr4E/nrm1SeVJAQAJ
https://usn.ubuntu.com/3588-1/
https://www.debian.org/security/2018/dsa-4218

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