CVE-2026-64587
In the Linux kernel, the following vulnerability has been resolved: net: ethernet: arc: emac: quiesce interrupts before requesting IRQ Normal RX/TX interrupts are enabled later, in arc_emac_open(), so probe should not see interrupt delivery in the usual case. However, hardware may still present stale or latched interrupt status left by firmware or the bootloader. If probe later unwinds after devm_request_irq() has installed the handler, such a stale interrupt can still reach arc_emac_intr() during teardown and race with release of the associated net_device. Avoid that window by putting the device into a known quiescent state before requesting the IRQ: disable all EMAC interrupt sources and clear any pending EMAC interrupt status bits. This keeps the change hardware-focused and minimal, while preventing spurious IRQ delivery from leftover state.
Affected versions
Linux kernel versions
3.11
and later are affected. Fixed in
5.10.253,
5.15.203,
6.1.167,
6.6.130,
6.12.78,
6.18.19,
6.19.9,
7.0
and their respective stable series.
References
8 totalFrequently asked questions
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What is CVE-2026-64587?
CVE-2026-64587 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 3.11 onward and has been patched in 5.10.253, 5.15.203, 6.1.167 and others. CVE-2026-64587 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-64587?
Yes. CVE-2026-64587 has been patched. Fixed versions include 5.10.253, 5.15.203, 6.1.167 and others. If you are running Linux kernel 3.11 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-64587 actively exploited?
No. CVE-2026-64587 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.