{"id":"CVE-2026-43345","state":"PUBLISHED","title":"net: ipa: fix event ring index not programmed for IPA v5.0+","description":"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.","publishedAt":"2026-05-08T13:39:31.222Z","updatedAt":"2026-08-05T12:27:22.811Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"faf0678ec8a0aa9039d8b188d012206abd67dd5c","status":"affected","lessThan":"ae8343a19ccb051d519dbb3a9082ddea9f0551d3","versionType":"git"},{"version":"faf0678ec8a0aa9039d8b188d012206abd67dd5c","status":"affected","lessThan":"2bf18b643c4656413f7cfd5615af60a6b4e261da","versionType":"git"},{"version":"faf0678ec8a0aa9039d8b188d012206abd67dd5c","status":"affected","lessThan":"2d2dc166d55148cfcf8ae67b415f8d6d110e6fca","versionType":"git"},{"version":"faf0678ec8a0aa9039d8b188d012206abd67dd5c","status":"affected","lessThan":"34c988bb04cbdf093d2134e179433da49ffcd044","versionType":"git"},{"version":"faf0678ec8a0aa9039d8b188d012206abd67dd5c","status":"affected","lessThan":"56007972c0b1e783ca714d6f1f4d6e66e531d21f","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ipa/reg/gsi_reg-v5.0.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.4","versionType":"semver"},{"version":"6.6.136","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.83","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.24","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.14","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ipa/reg/gsi_reg-v5.0.c"]}],"references":["https://git.kernel.org/stable/c/ae8343a19ccb051d519dbb3a9082ddea9f0551d3","https://git.kernel.org/stable/c/2bf18b643c4656413f7cfd5615af60a6b4e261da","https://git.kernel.org/stable/c/2d2dc166d55148cfcf8ae67b415f8d6d110e6fca","https://git.kernel.org/stable/c/34c988bb04cbdf093d2134e179433da49ffcd044","https://git.kernel.org/stable/c/56007972c0b1e783ca714d6f1f4d6e66e531d21f"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/43xxx/CVE-2026-43345.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-43345","state":"PUBLISHED","datePublished":"2026-05-08T13:39:31.222Z","dateUpdated":"2026-08-05T12:27:22.811Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-01T14:12:56.003Z"},"containers":{"cna":{"title":"net: ipa: fix event ring index not programmed for IPA v5.0+","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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"faf0678ec8a0aa9039d8b188d012206abd67dd5c","status":"affected","lessThan":"ae8343a19ccb051d519dbb3a9082ddea9f0551d3","versionType":"git"},{"version":"faf0678ec8a0aa9039d8b188d012206abd67dd5c","status":"affected","lessThan":"2bf18b643c4656413f7cfd5615af60a6b4e261da","versionType":"git"},{"version":"faf0678ec8a0aa9039d8b188d012206abd67dd5c","status":"affected","lessThan":"2d2dc166d55148cfcf8ae67b415f8d6d110e6fca","versionType":"git"},{"version":"faf0678ec8a0aa9039d8b188d012206abd67dd5c","status":"affected","lessThan":"34c988bb04cbdf093d2134e179433da49ffcd044","versionType":"git"},{"version":"faf0678ec8a0aa9039d8b188d012206abd67dd5c","status":"affected","lessThan":"56007972c0b1e783ca714d6f1f4d6e66e531d21f","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ipa/reg/gsi_reg-v5.0.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.4","versionType":"semver"},{"version":"6.6.136","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.83","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.24","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.14","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ipa/reg/gsi_reg-v5.0.c"]}],"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"}],"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."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-05T12:27:22.811Z"},"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"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}