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Vulnerability record · CVE-2026-98131 · published 25 September 2026

CVE-2026-98131: Linux kernel memory leak vulnerability

Linux · Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: net: stmmac: fix dma mapping leak in stmmac_tso_xmit() In stmmac_tso_xmit(), if the DMA mapping of an skb fragment fails, the frame is dropped but the DMA mappings already created for the linear part and for the fragments mapped before the failure are never unmapped, leaking DMA mappings. Fix the leak by walking back over the descriptors used by the frame and releasing each of them with stmmac_free_tx_buffer(). Moreover, release the descriptors with stmmac_release_tx_desc() unmapping the DMA buffers.

5.5 CVSS 3.1 Medium EPSS 0.12% · top 98.0% CWE-401 · Memory leak
5.5CVSS 3.1 base score
0.12%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
21 Oct 2026Last modified by NVD

Description

In the Linux kernel, the following vulnerability has been resolved: net: stmmac: fix dma mapping leak in stmmac_tso_xmit() In stmmac_tso_xmit(), if the DMA mapping of an skb fragment fails, the frame is dropped but the DMA mappings already created for the linear part and for the fragments mapped before the failure are never unmapped, leaking DMA mappings. Fix the leak by walking back over the descriptors used by the frame and releasing each of them with stmmac_free_tx_buffer(). Moreover, release the descriptors with stmmac_release_tx_desc() unmapping the DMA buffers.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/8a3257f142ae513d0c96d42f97386d4941bcec29
https://git.kernel.org/stable/c/a5d946466a95621fa2769720d59ea336003aa1a5 Patch
https://git.kernel.org/stable/c/c5449b635362cb678d29d8f6ab54e65734d891ce
https://git.kernel.org/stable/c/e85adaac3dc6317cae902372c6849189ec62cf7d Patch

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Source: NIST National Vulnerability Database (record CVE-2026-98131), CISA KEV, FIRST EPSS (scores of 2026-11-11). This page is refreshed as NVD updates the record.