# CVE-2026-48101: 7zip: 7-Zip is a file archiver with a high compression ratio

CVE-2026-48101 is fixed in 2 products on 1 platform, first by SUSE-SU-2026:22347-1, released June 23, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-48101
- Priority: Routine
- CVSS: 6.5 (medium)
- EPSS: 0.0028
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 5, 2026

## Description

7-Zip is a file archiver with a high compression ratio. Versions 9.21 through 26.00 contain an An uninitialized memory disclosure vulnerability in the UEFI capsule (.scap) parser in 7-Zip. The OpenCapsule function allocates a heap buffer of attacker-declared CapsuleImageSize (up to 1 GiB) without zero-initialization, then reads the file contents into it with ReadStream_FALSE whose return value is silently discarded. If the file is truncated, the unread tail of the buffer retains uninitialized heap memory, which is then exposed as extracted file content via GetStream. Version 26.0.1 fixes the issue.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | 7zip Debian 12.15 (bookworm) | 22.01+really26.01+dfsg-0+deb12u1 | [DEBIAN-CVE-2026-48101](https://patchblox.com/security/data/fix/linux/debian-cve-2026-48101.md) | Jun 24, 2026 |
| Linux | 7zip Debian 14 | 26.01+dfsg-1 | [DEBIAN-CVE-2026-48101](https://patchblox.com/security/data/fix/linux/debian-cve-2026-48101.md) | Jun 24, 2026 |
| Linux | 7zip opensuse-leap 16.0 | 26.01-160000.1.1 | [OPENSUSE-SU-2026:21038-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21038-1.md) | Jun 23, 2026 |
| Linux | 7zip sles 15.6 | 26.01-150400.9.6.1 | [SUSE-SU-2026:2696-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2696-1.md) | Jun 30, 2026 |
| Linux | 7zip sles 15.7 | 26.01-150400.9.6.1 | [SUSE-SU-2026:2696-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2696-1.md) | Jun 30, 2026 |
| Linux | 7zip sles 16.0 | 26.01-160000.1.1 | [SUSE-SU-2026:22347-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-22347-1.md) | Jun 23, 2026 |
| Linux | p7zip Debian 12.15 (bookworm) | 16.02+really26.01+dfsg-0+deb12u1 | [DEBIAN-CVE-2026-48101](https://patchblox.com/security/data/fix/linux/debian-cve-2026-48101.md) | Jun 24, 2026 |
| Linux | p7zip Debian 13.5 (trixie) | 16.02+transitional.1 | [DEBIAN-CVE-2026-48101](https://patchblox.com/security/data/fix/linux/debian-cve-2026-48101.md) | Jun 24, 2026 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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