CVE-2026-64587 is a vulnerability in Linux Kernel
Published on August 6, 2026
net: ethernet: arc: emac: quiesce interrupts before requesting IRQ
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.
Products Associated with CVE-2026-64587
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Affected Versions
Linux:- Version e4f2379db6c6823c5d4a4c2c912df00c65de51d7 and below abd338da658d7faa8e26cfefc8f83f0066707564 is affected.
- Version e4f2379db6c6823c5d4a4c2c912df00c65de51d7 and below 5f29dd540fe5ea3c826fc8ec759ba488b31f9707 is affected.
- Version e4f2379db6c6823c5d4a4c2c912df00c65de51d7 and below 6fc7449773748c7b904235a09a67054d78ab1172 is affected.
- Version e4f2379db6c6823c5d4a4c2c912df00c65de51d7 and below 81431da777924dddaefa5c9b0ca9da4a93f9df96 is affected.
- Version e4f2379db6c6823c5d4a4c2c912df00c65de51d7 and below d0f2386f529807826e7404d40a245ee428f89f62 is affected.
- Version e4f2379db6c6823c5d4a4c2c912df00c65de51d7 and below 8efd5dcd31e22a9308b16b107a052fcd568c0a99 is affected.
- Version e4f2379db6c6823c5d4a4c2c912df00c65de51d7 and below 8f9adb3605e36f75639de529bb3d66e94194a388 is affected.
- Version e4f2379db6c6823c5d4a4c2c912df00c65de51d7 and below 2503d08f8a2de618e5c3a8183b250ff4a2e2d52c is affected.
- Version 3.11 is affected.
- Before 3.11 is unaffected.
- Version 5.10.253, <= 5.10.* is unaffected.
- Version 5.15.203, <= 5.15.* is unaffected.
- Version 6.1.167, <= 6.1.* is unaffected.
- Version 6.6.130, <= 6.6.* is unaffected.
- Version 6.12.78, <= 6.12.* is unaffected.
- Version 6.18.19, <= 6.18.* is unaffected.
- Version 6.19.9, <= 6.19.* is unaffected.
- Version 7.0, <= * is unaffected.