An integer underflow vulnerability exists in pixel-a.asm, the x86 assembly code for planeClipAndMax() in MulticoreWare x265 through 2.4, as used by the x265_encoder_encode dependency in libbpg and other products
Published May 11, 2017
5.5
MEDIUMCVSS 3.1
EPSS 0.80%
Description
An integer underflow vulnerability exists in pixel-a.asm, the x86 assembly code for planeClipAndMax() in MulticoreWare x265 through 2.4, as used by the x265_encoder_encode dependency in libbpg and other products. A small picture can cause an integer underflow, which leads to a Denial of Service in the process of encoding.
Affected products
No data.
- ≤ 2.4
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.80% (0.00799) | 54.93th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.80% (0.00799) | 54.99th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.05% (0.00051) | 20.41th | v3 (v2023.03.01) |
| Apr 25, 2024 | 0.05% (0.00051) | 18.51th | v3 (v2023.03.01) |
| Mar 15, 2024 | 0.05% (0.00049) | 15.50th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.04% (0.00044) | 10.26th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.06% (0.00056) | 21.55th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00885) | 10.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.52% (0.00518) | 11.68th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.52% (0.00518) | 0.00th | v1 |
References (1)
- https://bitbucket.org/multicoreware/x265/issues/345/integer-underflow-in-x265-source-common x_refsource_MISCExploitIssue TrackingPatchThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://bitbucket.org/multicoreware/x265/issues/345/integer-underflow-in-x265-source-common | x_refsource_MISCExploitIssue TrackingPatchThird Party Advisory |
Change history (0)
No recorded changes yet.