VulnerabilityPublished 25 Sep 2026Updated 21 Oct 2026

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

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in e85adaac3dc6317cae902372c6849189ec62cf7d : update Linux kernel when convenient.

Data as of 26 Oct 2026, 17:16 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 1% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in e85adaac3dc6317cae902372c6849189ec62cf7d, c5449b635362cb678d29d8f6ab54e65734d891ce, a5d946466a95621fa2769720d59ea336003aa1a5 +1

Exploitation evidence

Disclosed: evidence found.
CVE published 25 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Linux kernel to e85adaac3dc6317cae902372c6849189ec62cf7d, c5449b635362cb678d29d8f6ab54e65734d891ce, a5d946466a95621fa2769720d59ea336003aa1a5 or 8a3257f142ae513d0c96d42f97386d4941bcec29.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ f748be531d7012c456b97f66091d86b3675c5fef, < e85adaac3dc6317cae902372c6849189ec62cf7d	Fixed in e85adaac3dc6317cae902372c6849189ec62cf7d
LinuxLinux	Affected ≥ f748be531d7012c456b97f66091d86b3675c5fef, < c5449b635362cb678d29d8f6ab54e65734d891ce	Fixed in c5449b635362cb678d29d8f6ab54e65734d891ce
LinuxLinux	Affected ≥ f748be531d7012c456b97f66091d86b3675c5fef, < a5d946466a95621fa2769720d59ea336003aa1a5	Fixed in a5d946466a95621fa2769720d59ea336003aa1a5
LinuxLinux	Affected ≥ f748be531d7012c456b97f66091d86b3675c5fef, < 8a3257f142ae513d0c96d42f97386d4941bcec29	Fixed in 8a3257f142ae513d0c96d42f97386d4941bcec29
LinuxLinux	Affected =4.7	Fixed in–

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.

References

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