What is CVE-2019-11926?

CVE-2019-11926 is a critical-severity vulnerability in Facebook Hhvm, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2019-09-06.

How severe is CVE-2019-11926?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Facebook Hhvm

CVE-2019-11926

Insufficient boundary checks when processing M_SOFx markers from JPEG headers in the GD extension could allow access to out-of-bounds memory via a maliciously constructed invalid JPEG input. This issue affects HHVM versions prior to 3.30.9…

Vulnerability class: Buffer Overflow

EPSS: 0.023 (81.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Facebook Hhvm — versions 4.21.0, 4.20.2, 4.20.0

Weakness classification (CWE)

References

cve-assign@fb.com (x_refsource_CONFIRM, Third Party Advisory)
cve-assign@fb.com (x_refsource_CONFIRM, Patch, Third Party Advisory)
cve-assign@fb.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2019-11926?: CVE-2019-11926 is a critical-severity vulnerability in Facebook Hhvm, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2019-09-06.
How severe is CVE-2019-11926?: Critical severity. CVSS v3 base score is 9.8 out of 10.