{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64587","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-07-19T15:36:31.798Z","datePublished":"2026-08-06T07:06:27.765Z","dateUpdated":"2026-08-08T15:13:24.903Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-08T15:13:24.903Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ethernet: arc: emac: quiesce interrupts before requesting IRQ\n\nNormal RX/TX interrupts are enabled later, in arc_emac_open(), so probe\nshould not see interrupt delivery in the usual case. However, hardware may\nstill present stale or latched interrupt status left by firmware or the\nbootloader.\n\nIf probe later unwinds after devm_request_irq() has installed the handler,\nsuch a stale interrupt can still reach arc_emac_intr() during teardown and\nrace with release of the associated net_device.\n\nAvoid that window by putting the device into a known quiescent state before\nrequesting the IRQ: disable all EMAC interrupt sources and clear any\npending EMAC interrupt status bits. This keeps the change hardware-focused\nand minimal, while preventing spurious IRQ delivery from leftover state."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - The flaw is in ARC/Rockchip EMAC platform probe/teardown (arc_emac_probe → free_netdev while the devm IRQ remains), not in packet processing; a remote or adjacent peer cannot induce this path via Ethernet frames.\nAC:H - Exploitation needs leftover firmware/bootloader-latched EMAC IRQ state plus a post-request_irq probe failure overlapping interrupt delivery; the attacker does not control that hardware/firmware precondition or IRQ timing.\nPR:L - An unprivileged local user can drive post-request_irq failures such as dmam_alloc_coherent -ENOMEM via memory pressure during deferred probe after userspace is up; platform bind/unbind is root-only but is not required for this path.\nUI:N - No victim action is required; once leftover IRQ state exists, the attacker can induce probe failure and race teardown without another user opening or configuring the interface.\nS:U - Impact is use-after-free/corruption inside the host kernel EMAC interrupt path and does not cross a VM, IOMMU, or other separate security authority.\nC:H - arc_emac_intr can run on a freed or half-initialized net_device (netdev_priv, NAPI, stats), a use-after-free that can expose attacker-influenced kernel heap contents.\nI:H - The same UAF lets the IRQ handler write through reclaimed net_device/NAPI state (e.g. napi_schedule), enabling heap corruption and potential control-flow hijacking.\nA:H - Dereferencing freed or uninitialized NAPI/netdev state in IRQ context can oops or panic the kernel, causing full denial of service."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/arc/emac_main.c"],"versions":[{"version":"e4f2379db6c6823c5d4a4c2c912df00c65de51d7","lessThan":"abd338da658d7faa8e26cfefc8f83f0066707564","status":"affected","versionType":"git"},{"version":"e4f2379db6c6823c5d4a4c2c912df00c65de51d7","lessThan":"5f29dd540fe5ea3c826fc8ec759ba488b31f9707","status":"affected","versionType":"git"},{"version":"e4f2379db6c6823c5d4a4c2c912df00c65de51d7","lessThan":"6fc7449773748c7b904235a09a67054d78ab1172","status":"affected","versionType":"git"},{"version":"e4f2379db6c6823c5d4a4c2c912df00c65de51d7","lessThan":"81431da777924dddaefa5c9b0ca9da4a93f9df96","status":"affected","versionType":"git"},{"version":"e4f2379db6c6823c5d4a4c2c912df00c65de51d7","lessThan":"d0f2386f529807826e7404d40a245ee428f89f62","status":"affected","versionType":"git"},{"version":"e4f2379db6c6823c5d4a4c2c912df00c65de51d7","lessThan":"8efd5dcd31e22a9308b16b107a052fcd568c0a99","status":"affected","versionType":"git"},{"version":"e4f2379db6c6823c5d4a4c2c912df00c65de51d7","lessThan":"8f9adb3605e36f75639de529bb3d66e94194a388","status":"affected","versionType":"git"},{"version":"e4f2379db6c6823c5d4a4c2c912df00c65de51d7","lessThan":"2503d08f8a2de618e5c3a8183b250ff4a2e2d52c","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/arc/emac_main.c"],"versions":[{"version":"3.11","status":"affected"},{"version":"0","lessThan":"3.11","status":"unaffected","versionType":"semver"},{"version":"5.10.253","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.203","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.167","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.130","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.78","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.19","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19.9","lessThanOrEqual":"6.19.*","status":"unaffected","versionType":"semver"},{"version":"7.0","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.11","versionEndExcluding":"5.10.253"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.11","versionEndExcluding":"5.15.203"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.11","versionEndExcluding":"6.1.167"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.11","versionEndExcluding":"6.6.130"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.11","versionEndExcluding":"6.12.78"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.11","versionEndExcluding":"6.18.19"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.11","versionEndExcluding":"6.19.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.11","versionEndExcluding":"7.0"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/abd338da658d7faa8e26cfefc8f83f0066707564"},{"url":"https://git.kernel.org/stable/c/5f29dd540fe5ea3c826fc8ec759ba488b31f9707"},{"url":"https://git.kernel.org/stable/c/6fc7449773748c7b904235a09a67054d78ab1172"},{"url":"https://git.kernel.org/stable/c/81431da777924dddaefa5c9b0ca9da4a93f9df96"},{"url":"https://git.kernel.org/stable/c/d0f2386f529807826e7404d40a245ee428f89f62"},{"url":"https://git.kernel.org/stable/c/8efd5dcd31e22a9308b16b107a052fcd568c0a99"},{"url":"https://git.kernel.org/stable/c/8f9adb3605e36f75639de529bb3d66e94194a388"},{"url":"https://git.kernel.org/stable/c/2503d08f8a2de618e5c3a8183b250ff4a2e2d52c"}],"title":"net: ethernet: arc: emac: quiesce interrupts before requesting IRQ","x_generator":{"engine":"bippy-1.2.0"}}}}