# CVE-2026-89601: linux: In the Linux kernel, the following vulnerability has been resolved:  ext2: Fix lost inode updates for IS_SYNC inodes...

CVE-2026-89601 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-89601, released September 23, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-89601
- Priority: High
- CVSS: 8.8 (high)
- EPSS: 0.0055
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 11, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  ext2: Fix lost inode updates for IS_SYNC inodes  ext2_setsize() and ext2_xattr_set2() had a construct like:  	if (IS_SYNC(inode)) { 		sync_inode_metadata(inode, 1); 	} else { 		mark_inode_dirty(inode); 	}  which leads to lost inode updates for IS_SYNC inodes because sync_inode_metadata() does anything only if the inode is already dirty and hence inode updates may be simply lost. Fix the problem by unconditionally marking the inode dirty and *then* call sync_inode_metadata().

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.12.115-2 | [DEBIAN-CVE-2026-89601](https://patchblox.com/security/data/fix/linux/debian-cve-2026-89601.md) | Sep 23, 2026 |
| Linux | linux Debian 14 | 7.2.6-1 | [DEBIAN-CVE-2026-89601](https://patchblox.com/security/data/fix/linux/debian-cve-2026-89601.md) | Sep 23, 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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