What is CVE-2022-31796?

CVE-2022-31796 is a medium-severity vulnerability in Jpeg Libjpeg, classified under Out-of-bounds Read. CVSS score: 6.5/10. Published 2022-06-02.

How severe is CVE-2022-31796?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Out-of-bounds Read in Jpeg Libjpeg

CVE-2022-31796

libjpeg 1.63 has a heap-based buffer over-read in HierarchicalBitmapRequester::FetchRegion in hierarchicalbitmaprequester.cpp because the MCU size can be different between allocation and use.

Vulnerability class: Buffer Overflow

Published 2022-06-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.009 (58.9th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 58.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: +0.000

Affected products

Jpeg Libjpeg — versions 1.63

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

github.com/thorfdbg/libjpeg/issues/71 (Third Party Advisory)
github.com/thorfdbg/libjpeg/commit/187035b9726710b4fe11d565c7808975c930895d (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2022-31796?: CVE-2022-31796 is a medium-severity vulnerability in Jpeg Libjpeg, classified under Out-of-bounds Read. CVSS score: 6.5/10. Published 2022-06-02.
How severe is CVE-2022-31796?: Medium severity. CVSS v3 base score is 6.5 out of 10.