# CVE-2026-53174: linux: In the Linux kernel, the following vulnerability has been resolved:  ovl: keep err zero after successful ovl_cache_ge...

CVE-2026-53174 is fixed in linux on 1 platform by DEBIAN-CVE-2026-53174 (version 7.0.13-1), released June 28, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-53174
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0017
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 25, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  ovl: keep err zero after successful ovl_cache_get()  ovl_iterate_merged() stores PTR_ERR(cache) in err before checking IS_ERR(cache). On success err holds the truncated cache pointer and can be returned as a bogus non-zero error.  The syzbot reproducer reaches this through overlay-on-overlay readdir:    getdents64     iterate_dir(outer overlay file)       ovl_iterate_merged()         ovl_cache_get()           ovl_dir_read_merged()             ovl_dir_read()               iterate_dir(inner overlay file)                 ovl_iterate_merged()  Only compute PTR_ERR(cache) on the error path.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 7.0.13-1 | [DEBIAN-CVE-2026-53174](https://patchblox.com/security/data/fix/linux/debian-cve-2026-53174.md) | Jun 28, 2026 |

---

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.