Medium 5.5Published Sep 25, 2026

CVE-2026-98131net: stmmac: fix dma mapping leak in stmmac_tso_xmit()

Updated under an hour ago (Oct 27, 2026, 11:50 AM ET)

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Exploited in the last 30 days

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: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 21, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from f748be531d7012c456b97f66091d86b3675c5fef before c5449b635362cb678d29d8f6ab54e65734d891ce; from f748be531d7012c456b97f66091d86b3675c5fef before 8a3257f142ae513d0c96d42f97386d4941bcec29; from f748be531d7012c456b97f66091d86b3675c5fef before e85adaac3dc6317cae902372c6849189ec62cf7d; from f748be531d7012c456b97f66091d86b3675c5fef before a5d946466a95621fa2769720d59ea336003aa1a5	CNA record
linux linux_kernel linux:linux_kernel	from 4.7 before 7.2.7; 7.3	NVD

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.