{ "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" } } } }