# CVE-2026-90266: linux: In the Linux kernel, the following vulnerability has been resolved:  btrfs: zoned: don't force read-only on transient...

CVE-2026-90266 is fixed in linux on 1 platform by DEBIAN-CVE-2026-90266 (version 7.2.6-1), released September 23, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-90266
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0020
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 17, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  btrfs: zoned: don't force read-only on transient -EAGAIN from reloc merge  On a zoned FS, btrfs_delayed_refs_rsv_refill() returns -EAGAIN whenever the over-committed metadata plus the zone_unusable bytes exceeds the usable size in a metadata block-group to avoid heavy over-commit of metadata and early ENOSPC in one transaction.  If this happens while doing reclaim, the transaction is getting aborted.  Treat -EAGAIN as a soft, retryable condition in case of block-group reclaim.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 7.2.6-1 | [DEBIAN-CVE-2026-90266](https://patchblox.com/security/data/fix/linux/debian-cve-2026-90266.md) | Sep 23, 2026 |

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Data as of 2026-11-08T19:12:23Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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