CVE-2026-43345

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-43345", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-01T14:12:56.003Z", "datePublished": "2026-05-08T13:39:31.222Z", "dateUpdated": "2026-08-05T12:27:22.811Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:27:22.811Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ipa: fix event ring index not programmed for IPA v5.0+\n\nFor IPA v5.0+, the event ring index field moved from CH_C_CNTXT_0 to\nCH_C_CNTXT_1. The v5.0 register definition intended to define this\nfield in the CH_C_CNTXT_1 fmask array but used the old identifier of\nERINDEX instead of CH_ERINDEX.\n\nWithout a valid event ring, GSI channels could never signal transfer\ncompletions. This caused gsi_channel_trans_quiesce() to block\nforever in wait_for_completion().\n\nAt least for IPA v5.2 this resolves an issue seen where runtime\nsuspend, system suspend, and remoteproc stop all hanged forever. It\nalso meant the IPA data path was completely non functional."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:N - The affected IPA/GSI channels are the Qualcomm modem/RMNet network data path, including AP receive channels driven by packets arriving from the cellular/network side. A remote peer can send traffic to a configured affected device without reaching any ioctl or local-only control interface.\nAC:L - The failure is deterministic on IPA v5.0+ hardware because the channel event-ring index is never encoded into CH_C_CNTXT_1. No race, heap shaping, or attacker-uncontrolled timing is needed once the affected channel is programmed and used.\nPR:N - For the remote packet/data-path scenario, the attacker does not need local credentials or kernel capabilities. The relevant receive path is packet-driven after the device and modem interface are configured by the system.\nUI:N - No victim action is required beyond the affected device being online with its IPA modem data path configured. Traffic or normal power-management transitions can exercise the broken completion path.\nS:U - The impact remains within the same kernel/device security authority. This is not a VM escape, IOMMU bypass, or cross-sandbox boundary violation.\nC:N - The bug is an incorrect hardware register field mask that prevents completion signaling; I found no out-of-bounds access, use-after-free, or attacker-readable memory exposure. The event rings are driver-allocated DMA rings, not an arbitrary disclosure primitive.\nI:N - The observed and code-supported impact is loss of completion signaling and broken data-path operation, not attacker-controlled modification of kernel memory or persistent data. There is no evident arbitrary write or control-flow corruption primitive.\nA:H - Missing completions cause waits such as gsi_channel_trans_quiesce() to block forever, hanging runtime suspend, system suspend, and remoteproc stop. The IPA data path can also become completely nonfunctional, so availability impact is high."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ipa/reg/gsi_reg-v5.0.c"], "versions": [{"version": "faf0678ec8a0aa9039d8b188d012206abd67dd5c", "lessThan": "ae8343a19ccb051d519dbb3a9082ddea9f0551d3", "status": "affected", "versionType": "git"}, {"version": "faf0678ec8a0aa9039d8b188d012206abd67dd5c", "lessThan": "2bf18b643c4656413f7cfd5615af60a6b4e261da", "status": "affected", "versionType": "git"}, {"version": "faf0678ec8a0aa9039d8b188d012206abd67dd5c", "lessThan": "2d2dc166d55148cfcf8ae67b415f8d6d110e6fca", "status": "affected", "versionType": "git"}, {"version": "faf0678ec8a0aa9039d8b188d012206abd67dd5c", "lessThan": "34c988bb04cbdf093d2134e179433da49ffcd044", "status": "affected", "versionType": "git"}, {"version": "faf0678ec8a0aa9039d8b188d012206abd67dd5c", "lessThan": "56007972c0b1e783ca714d6f1f4d6e66e531d21f", "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/ipa/reg/gsi_reg-v5.0.c"], "versions": [{"version": "6.4", "status": "affected"}, {"version": "0", "lessThan": "6.4", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.136", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.83", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.24", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.14", "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": "6.4", "versionEndExcluding": "6.6.136"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.12.83"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.18.24"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.19.14"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ae8343a19ccb051d519dbb3a9082ddea9f0551d3"}, {"url": "https://git.kernel.org/stable/c/2bf18b643c4656413f7cfd5615af60a6b4e261da"}, {"url": "https://git.kernel.org/stable/c/2d2dc166d55148cfcf8ae67b415f8d6d110e6fca"}, {"url": "https://git.kernel.org/stable/c/34c988bb04cbdf093d2134e179433da49ffcd044"}, {"url": "https://git.kernel.org/stable/c/56007972c0b1e783ca714d6f1f4d6e66e531d21f"}], "title": "net: ipa: fix event ring index not programmed for IPA v5.0+", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

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The v5.0 register definition intended to define this\nfield in the CH_C_CNTXT_1 fmask array but used the old identifier of\nERINDEX instead of CH_ERINDEX.\n\nWithout a valid event ring, GSI channels could never signal transfer\ncompletions. This caused gsi_channel_trans_quiesce() to block\nforever in wait_for_completion().\n\nAt least for IPA v5.2 this resolves an issue seen where runtime\nsuspend, system suspend, and remoteproc stop all hanged forever. It\nalso meant the IPA data path was completely non functional."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnet: ipa: correcci\u00f3n del \u00edndice del anillo de eventos no programado para IPA v5.0+\n\nPara IPA v5.0+, el campo del \u00edndice del anillo de eventos se movi\u00f3 de CH_C_CNTXT_0 a CH_C_CNTXT_1. La definici\u00f3n del registro v5.0 ten\u00eda la intenci\u00f3n de definir este campo en el array fmask de CH_C_CNTXT_1, pero us\u00f3 el identificador antiguo de ERINDEX en lugar de CH_ERINDEX.\n\nSin un anillo de eventos v\u00e1lido, los canales GSI nunca podr\u00edan se\u00f1alar la finalizaci\u00f3n de transferencias. Esto caus\u00f3 que gsi_channel_trans_quiesce() se bloqueara para siempre en wait_for_completion().\n\nAl menos para IPA v5.2, esto resuelve un problema observado donde la suspensi\u00f3n en tiempo de ejecuci\u00f3n, la suspensi\u00f3n del sistema y la detenci\u00f3n de remoteproc se colgaban todas para siempre. Tambi\u00e9n significaba que la ruta de datos de IPA era completamente no funcional."}], "id": "CVE-2026-43345", "lastModified": "2026-11-11T20:10:00.273", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-05-08T14:16:44.547", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2bf18b643c4656413f7cfd5615af60a6b4e261da"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2d2dc166d55148cfcf8ae67b415f8d6d110e6fca"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/34c988bb04cbdf093d2134e179433da49ffcd044"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/56007972c0b1e783ca714d6f1f4d6e66e531d21f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ae8343a19ccb051d519dbb3a9082ddea9f0551d3"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: net: ipa: fix event ring index not programmed for IPA v5.0+", "id": "2468040", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2468040"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-1285", "details": ["A flaw was found in the Linux kernel's ipa driver. This vulnerability, affecting IPA version 5.0 and later, stems from an incorrect event ring index programming, preventing GSI channels from signaling transfer completions. As a result, the system can experience hangs during operations such as runtime suspend, system suspend, and remoteproc stop. This leads to a Denial of Service (DoS), rendering the IPA data path completely non-functional."], "name": "CVE-2026-43345", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-08T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43345\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43345\nhttps://lore.kernel.org/linux-cve-announce/2026050837-CVE-2026-43345-3cfe@gregkh/T"], "threat_severity": "Moderate"}

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