# CVE-2026-98587: linux: In the Linux kernel, the following vulnerability has been resolved:  firewire: cdev: fix back-transition for iso_reso...

CVE-2026-98587 is fixed in linux on 1 platform by DEBIAN-CVE-2026-98587 (version 7.2.9-1), released October 19, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-98587
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0019
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 18, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  firewire: cdev: fix back-transition for iso_resource_auto client resource  The todo member of iso_resource_auto structure represents the state of the client resource and normally transitions in the following order:      ISO_RES_AUTO_ALLOC -> ISO_RES_AUTO_REALLOC -> ISO_RES_AUTO_DEALLOC  However, concurrent access from the work item and the file descriptor release function can cause the state to transition backwards from ISO_RES_AUTO_DEALLOC to ISO_RES_AUTO_REALLOC.  Prevent the back-transition by checking the current state before updating it in the work item.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 7.2.9-1 | [DEBIAN-CVE-2026-98587](https://patchblox.com/security/data/fix/linux/debian-cve-2026-98587.md) | Oct 19, 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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