CVE-2026-21413
Critical CVSS 9.8Published 2026-04-07 ยท last changed 2026-07-15
The fix
Microsoft publishes remediation for this across 24 product branches. The fixed build differs per Windows version, so the row that matters is the one matching the machine you are looking at.
| Windows version | Fixed in build | Update | Released |
|---|---|---|---|
| Raw Image Extension on Windows 10 for 32-bit Systems | 2.4.36.0 | configuration change | 2026-10-13 |
| Raw Image Extension on Windows 10 for x64-based Systems | 2.4.36.0 | configuration change | 2026-10-13 |
| Raw Image Extension on Windows 10 Version 1607 for 32-bit Systems | 2.4.36.0 | configuration change | 2026-10-13 |
| Raw Image Extension on Windows 10 Version 1607 for x64-based Systems | 2.4.36.0 | configuration change | 2026-10-13 |
| Raw Image Extension on Windows 10 Version 1809 for 32-bit Systems | 2.4.36.0 | configuration change | 2026-10-13 |
| Raw Image Extension on Windows 10 Version 1809 for ARM64-based Systems | 2.4.36.0 | configuration change | 2026-10-13 |
| Raw Image Extension on Windows 10 Version 1809 for HoloLens | 2.4.36.0 | configuration change | 2026-10-13 |
| Raw Image Extension on Windows 10 Version 1809 for x64-based Systems | 2.4.36.0 | configuration change | 2026-10-13 |
| Raw Image Extension on Windows 10 Version 1909 for 32-bit Systems | 2.4.36.0 | configuration change | 2026-10-13 |
| Raw Image Extension on Windows 10 Version 1909 for ARM64-based Systems | 2.4.36.0 | configuration change | 2026-10-13 |
| Raw Image Extension on Windows 10 Version 1909 for x64-based Systems | 2.4.36.0 | configuration change | 2026-10-13 |
| Raw Image Extension on Windows 10 Version 20H2 for 32-bit Systems | 2.4.36.0 | configuration change | 2026-10-13 |
| Raw Image Extension on Windows 10 Version 20H2 for ARM64-based Systems | 2.4.36.0 | configuration change | 2026-10-13 |
| Raw Image Extension on Windows 10 Version 21H1 for 32-bit Systems | 2.4.36.0 | configuration change | 2026-10-13 |
| Raw Image Extension on Windows 10 Version 21H1 for ARM64-based Systems | 2.4.36.0 | configuration change | 2026-10-13 |
| Raw Image Extension on Windows 10 Version 21H1 for x64-based Systems | 2.4.36.0 | configuration change | 2026-10-13 |
| Raw Image Extension on Windows 10 Version 21H2 for 32-bit Systems | 2.4.36.0 | configuration change | 2026-10-13 |
| Raw Image Extension on Windows 10 Version 21H2 for ARM64-based Systems | 2.4.36.0 | configuration change | 2026-10-13 |
| Raw Image Extension on Windows 10 Version 21H2 for x64-based Systems | 2.4.36.0 | configuration change | 2026-10-13 |
| Raw Image Extension on Windows 11 version 21H2 for ARM64-based Systems | 2.5.35.0 | configuration change | 2026-10-13 |
| Raw Image Extension on Windows 11 version 21H2 for x64-based Systems | 2.5.35.0 | configuration change | 2026-10-13 |
| Raw Image Extension on Windows 11 version 26H2 | 2.5.35.0 | configuration change | 2026-10-13 |
| Raw Image Extension on Windows 11 Version 26H2 for ARM64-based Systems | 2.5.35.0 | configuration change | 2026-10-13 |
| Raw Image Extension on Windows 11 Version 26H2 for x64-based Systems | 2.5.35.0 | configuration change | 2026-10-13 |
Having the KB is not the same as knowing whether a machine has it. Windows updates supersede each other, so the update you installed often covers a fix that shipped in an earlier one. Paste your build into the patch checker and it walks that chain for you.
What it is
A heap-based buffer overflow vulnerability exists in the lossless_jpeg_load_raw functionality of LibRaw Commit 0b56545 and Commit d20315b. A specially crafted malicious file can lead to a heap buffer overflow. An attacker can provide a malicious file to trigger this vulnerability.
Sources
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H