Description
OpenCV (Open Source Computer Vision Library) through 3.3 has an out-of-bounds read error in the cv::RBaseStream::readBlock function in modules/imgcodecs/src/bitstrm.cpp when reading an image file by using cv::imread, as demonstrated by the 8-opencv-invalid-read-fread test case.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | opencv | 3.2.0+dfsg-6 | — |
| Debian 13 | opencv | 3.2.0+dfsg-6 | — |
| Debian 12 | opencv | 3.2.0+dfsg-6 | — |
| Debian 9 | opencv | 2.4.9.1+dfsg1-2+deb9u1 | DLA-2799-1 |
| Debian 8 | opencv | 2.4.9.1+dfsg-1+deb8u2 | DLA-1438-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 7 | opencv | 2.3.1-11+deb7u2 | DLA-1117-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | opencv | 3.2.0+dfsg-4ubuntu0.1 | — |
| Ubuntu 16.04 LTS | opencv | 2.4.9.1+dfsg-1.5ubuntu1.1 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | opencv-contrib-python | < 3.3.1.11 | 3.3.1.11 | GHSA-33h2-69j3-r336 |
| PyPI | opencv-python | < 3.3.1.11 | 3.3.1.11 | GHSA-33h2-69j3-r336 |
Advisories 3
- DLA-2799-1 opencv - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1438-1 opencv - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1117-1 opencv - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- [debian-lts-announce] 20180722 [SECURITY] [DLA 1438-1] opencv security update mailing-list
- GLSA-201712-02 vendor-advisory
- https://github.com/xiaoqx/pocs/blob/master/opencv.md
- https://github.com/opencv/opencv/issues/9309
- [debian-lts-announce] 20211030 [SECURITY] [DLA 2799-1] opencv security update mailing-list