# CVE-2023-39804: tar: In GNU tar before 1.35, mishandled extension attributes in a PAX archive can lead to an application crash in xheader.c.

CVE-2023-39804 is fixed in 4 products on 1 platform, first by tar 1.29b-2ubuntu0.4+esm1, released November 29, 2023. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2023-39804
- Priority: Routine
- CVSS: 6.2 (medium)
- EPSS: 0.0028
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 29, 2023

## Description

In GNU tar before 1.35, mishandled extension attributes in a PAX archive can lead to an application crash in xheader.c.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | tar Debian 12.15 (bookworm) | 1.34+dfsg-1.2+deb12u1 | [DEBIAN-CVE-2023-39804](https://patchblox.com/security/data/fix/linux/debian-cve-2023-39804.md) | Mar 27, 2024 |
| Linux | tar Debian 13.5 (trixie) | 1.34+dfsg-1.3 | [DEBIAN-CVE-2023-39804](https://patchblox.com/security/data/fix/linux/debian-cve-2023-39804.md) | Mar 27, 2024 |
| Linux | tar Debian 14 | 1.34+dfsg-1.3 | [DEBIAN-CVE-2023-39804](https://patchblox.com/security/data/fix/linux/debian-cve-2023-39804.md) | Mar 27, 2024 |
| Linux | tar Ubuntu 18.04.6 LTS (bionic) | 1.29b-2ubuntu0.4+esm1 | [tar 1.29b-2ubuntu0.4+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-tar-1.29b-2ubuntu0.4-esm1.md) | Nov 29, 2023 |
| Linux | tar Ubuntu 20.04 LTS (focal) | 1.30+dfsg-7ubuntu0.20.04.4 | [tar 1.30+dfsg-7ubuntu0.20.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-tar-1.30-dfsg-7ubuntu0.20.04.4.md) | Nov 29, 2023 |
| Linux | tar Ubuntu 22.04.1 LTS (jammy) | 1.34+dfsg-1ubuntu0.1.22.04.2 | [tar 1.34+dfsg-1ubuntu0.1.22.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-tar-1.34-dfsg-1ubuntu0.1.22.04.2.md) | Nov 29, 2023 |
| Linux | tar amzn 2023 | 2:1.34-1.amzn2023.0.4 | [ALAS2023-2024-475](https://patchblox.com/security/data/fix/linux/alas2023-2024-475.md) | Jan 3, 2024 |
| Linux | tar-debuginfo amzn 2023 | 2:1.34-1.amzn2023.0.4 | [ALAS2023-2024-475](https://patchblox.com/security/data/fix/linux/alas2023-2024-475.md) | Jan 3, 2024 |
| Linux | tar-debugsource amzn 2023 | 2:1.34-1.amzn2023.0.4 | [ALAS2023-2024-475](https://patchblox.com/security/data/fix/linux/alas2023-2024-475.md) | Jan 3, 2024 |
| Linux | tar-scripts Ubuntu 18.04.6 LTS (bionic) | 1.29b-2ubuntu0.4+esm1 | [tar-scripts 1.29b-2ubuntu0.4+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-tar-scripts-1.29b-2ubuntu0.4-esm1.md) | Nov 29, 2023 |
| Linux | tar-scripts Ubuntu 20.04 LTS (focal) | 1.30+dfsg-7ubuntu0.20.04.4 | [tar-scripts 1.30+dfsg-7ubuntu0.20.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-tar-scripts-1.30-dfsg-7ubuntu0.20.04.4.md) | Nov 29, 2023 |
| Linux | tar-scripts Ubuntu 22.04.1 LTS (jammy) | 1.34+dfsg-1ubuntu0.1.22.04.2 | [tar-scripts 1.34+dfsg-1ubuntu0.1.22.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-tar-scripts-1.34-dfsg-1ubuntu0.1.22.04.2.md) | Nov 29, 2023 |

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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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