CVE-2026-98131 is a vulnerability in Linux Kernel
Published on September 25, 2026
net: stmmac: fix dma mapping leak in stmmac_tso_xmit()
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.
Products Associated with CVE-2026-98131
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Affected Versions
Linux:- Version f748be531d7012c456b97f66091d86b3675c5fef and below e85adaac3dc6317cae902372c6849189ec62cf7d is affected.
- Version f748be531d7012c456b97f66091d86b3675c5fef and below a5d946466a95621fa2769720d59ea336003aa1a5 is affected.
- Version 4.7 is affected.
- Before 4.7 is unaffected.
- Version 7.2.7, <= 7.2.* is unaffected.
- Version 7.3-rc2, <= * is unaffected.