# CVE-2026-98324: linux: In the Linux kernel, the following vulnerability has been resolved:  dmaengine: pxa: fix double counting of the hw de...

CVE-2026-98324 is fixed in linux on 1 platform by DEBIAN-CVE-2026-98324 (version 7.2.8-1), released October 6, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-98324
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0013
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 6, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  dmaengine: pxa: fix double counting of the hw descriptors  pxad_alloc_desc() was converted from          kzalloc(struct_size(sw_desc, hw_desc, nb_hw_desc), GFP_NOWAIT)  to kzalloc_flex(), which sets the __counted_by() counter sw_desc->nb_desc itself - but only where the compiler has __builtin_counted_by_ref(), so from gcc 15.1 or clang 22.1 on. The loop below it still increments nb_desc, which makes it come out doubled there and correct elsewhere.  nb_desc is what pxad_free_desc() iterates over and what set_updater_desc() indexes from, so set it explicitly and drop the increment. The error path has to lower it to the number of descriptors allocated so far, otherwise pxad_free_desc() would free entries that were never allocated.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 7.2.8-1 | [DEBIAN-CVE-2026-98324](https://patchblox.com/security/data/fix/linux/debian-cve-2026-98324.md) | Oct 6, 2026 |

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Data as of 2026-11-10T07:50:38Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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