# RHSA-2026:70390: tar security update

RHSA-2026:70390, released September 23, 2026, fixes 4 CVEs in tar (version 2:1.30-13.el8_10). None of them is reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2026-70390
- Platform: Linux
- Released: Sep 23, 2026
- Priority: Routine (Closes 4 CVEs, none high severity)
- CVEs: 4, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2026:70390

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [tar](https://patchblox.com/security/data/product/linux/tar.md) | RHEL 8 | 2:1.30-13.el8_10 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2025-45582](https://patchblox.com/security/data/cve/CVE-2025-45582.md) | Routine | GNU Tar through 1.35 allows file overwrite via directory traversal in crafted TAR archives, with a certain two-step process. First, the victim must extract an archive that contains a ../ symlink to a critical directory. Second, the victim must extract an archive that contains a critical file, specified via a relative pathname that begins with the symlink name and ends with that critical file's name. Here, the extraction follows the symlink and overwrites the critical file. This bypasses the protection mechanism of "Member name contains '..'" that would occur for a single TAR archive that attempted to specify the critical file via a ../ approach. For example, the first archive can contain "x -> ../../../../../home/victim/.ssh" and the second archive can contain x/authorized_keys. This can affect server applications that automatically extract any number of user-supplied TAR archives, and were relying on the blocking of traversal. This can also affect software installation processes in wh | 5.6 | 0.0049 |  |
| [CVE-2026-5704](https://patchblox.com/security/data/cve/CVE-2026-5704.md) | Routine | tar: A flaw was found in tar | 5.6 | 0.0047 |  |
| [CVE-2026-18508](https://patchblox.com/security/data/cve/CVE-2026-18508.md) | Routine | Tar: tar: --one-top-level hardlink targets not confined to top-level directory enabling arbitrary file overwrite | 5.6 | 0.0014 |  |
| [CVE-2026-18477](https://patchblox.com/security/data/cve/CVE-2026-18477.md) | Routine | Tar: tar: toctou in incremental dumpdir 'x' rename handling allows restore path escape | 5.6 | 0.0010 |  |

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Data as of 2026-11-07T18:46:35Z 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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