{"id":"CVE-2026-89594","state":"PUBLISHED","title":"hsi: omap_ssi_core: fix missing DMA mask setup for SSI controller device","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nhsi: omap_ssi_core: fix missing DMA mask setup for SSI controller device\n\nThe OMAP SSI driver uses a synthetic HSI controller device allocated via\nhsi_alloc_controller(), which does not go through the normal OF/platform\ndevice initialization path.\n\nAs a result, the embedded struct device does not have a DMA mask\ninitialized by default.\n\nAfter recent DMA API hardening changes, dma_map_sg() and related helpers\nnow require a valid dma_mask to be present, otherwise the driver may\ncrash or trigger warnings when attempting DMA mapping operations.\n\nFix this by explicitly initializing the DMA mask for the SSI controller\ndevice and setting a 32-bit DMA mask, which matches the hardware\ncapabilities.","publishedAt":"2026-09-11T19:44:57.291Z","updatedAt":"2026-10-19T08:49:26.718Z","severity":{"score":7.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"f959dcd6ddfd29235030e8026471ac1b022ad2b0","status":"affected","lessThan":"6a5426f56de98faf7886702f8720828bf346a48f","versionType":"git"},{"version":"f959dcd6ddfd29235030e8026471ac1b022ad2b0","status":"affected","lessThan":"a4beb841f84e0e6ad5ff3d114f43ad30165572dd","versionType":"git"},{"version":"f959dcd6ddfd29235030e8026471ac1b022ad2b0","status":"affected","lessThan":"9ecef057b7a7f165ce66eaf07cb4cf85d10ed9c7","versionType":"git"},{"version":"f959dcd6ddfd29235030e8026471ac1b022ad2b0","status":"affected","lessThan":"9963a65be2befff82b5f5a7cfcd7ac4aca081c0b","versionType":"git"},{"version":"f959dcd6ddfd29235030e8026471ac1b022ad2b0","status":"affected","lessThan":"e8d47e309c704df95816e7442f05947424d8b33f","versionType":"git"},{"version":"f959dcd6ddfd29235030e8026471ac1b022ad2b0","status":"affected","lessThan":"4e019e5e247bfe877fdf288f2d6ec1b4c850c7c6","versionType":"git"},{"version":"f959dcd6ddfd29235030e8026471ac1b022ad2b0","status":"affected","lessThan":"fbffbfdae55954213fea99c5c9856c48dc705019","versionType":"git"},{"version":"f959dcd6ddfd29235030e8026471ac1b022ad2b0","status":"affected","lessThan":"e81250ec6b69248b00d38c523dc6a13efaf38aab","versionType":"git"},{"version":"4e57482e8440fac7137832629109730ea4b267aa","status":"affected","versionType":"git"},{"version":"5.9.2","status":"affected","lessThan":"5.10","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hsi/controllers/omap_ssi_core.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.10","versionType":"semver"},{"version":"5.10.270","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.221","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.109","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.50","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.4","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hsi/controllers/omap_ssi_core.c"]}],"references":["https://git.kernel.org/stable/c/6a5426f56de98faf7886702f8720828bf346a48f","https://git.kernel.org/stable/c/a4beb841f84e0e6ad5ff3d114f43ad30165572dd","https://git.kernel.org/stable/c/9ecef057b7a7f165ce66eaf07cb4cf85d10ed9c7","https://git.kernel.org/stable/c/9963a65be2befff82b5f5a7cfcd7ac4aca081c0b","https://git.kernel.org/stable/c/e8d47e309c704df95816e7442f05947424d8b33f","https://git.kernel.org/stable/c/4e019e5e247bfe877fdf288f2d6ec1b4c850c7c6","https://git.kernel.org/stable/c/fbffbfdae55954213fea99c5c9856c48dc705019","https://git.kernel.org/stable/c/e81250ec6b69248b00d38c523dc6a13efaf38aab"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:26.108Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/89xxx/CVE-2026-89594.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-89594","state":"PUBLISHED","datePublished":"2026-09-11T19:44:57.291Z","dateUpdated":"2026-10-19T08:49:26.718Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.730Z"},"containers":{"cna":{"title":"hsi: omap_ssi_core: fix missing DMA mask setup for SSI controller device","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nhsi: omap_ssi_core: fix missing DMA mask setup for SSI controller device\n\nThe OMAP SSI driver uses a synthetic HSI controller device allocated via\nhsi_alloc_controller(), which does not go through the normal OF/platform\ndevice initialization path.\n\nAs a result, the embedded struct device does not have a DMA mask\ninitialized by default.\n\nAfter recent DMA API hardening changes, dma_map_sg() and related helpers\nnow require a valid dma_mask to be present, otherwise the driver may\ncrash or trigger warnings when attempting DMA mapping operations.\n\nFix this by explicitly initializing the DMA mask for the SSI controller\ndevice and setting a 32-bit DMA mask, which matches the hardware\ncapabilities."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"f959dcd6ddfd29235030e8026471ac1b022ad2b0","status":"affected","lessThan":"6a5426f56de98faf7886702f8720828bf346a48f","versionType":"git"},{"version":"f959dcd6ddfd29235030e8026471ac1b022ad2b0","status":"affected","lessThan":"a4beb841f84e0e6ad5ff3d114f43ad30165572dd","versionType":"git"},{"version":"f959dcd6ddfd29235030e8026471ac1b022ad2b0","status":"affected","lessThan":"9ecef057b7a7f165ce66eaf07cb4cf85d10ed9c7","versionType":"git"},{"version":"f959dcd6ddfd29235030e8026471ac1b022ad2b0","status":"affected","lessThan":"9963a65be2befff82b5f5a7cfcd7ac4aca081c0b","versionType":"git"},{"version":"f959dcd6ddfd29235030e8026471ac1b022ad2b0","status":"affected","lessThan":"e8d47e309c704df95816e7442f05947424d8b33f","versionType":"git"},{"version":"f959dcd6ddfd29235030e8026471ac1b022ad2b0","status":"affected","lessThan":"4e019e5e247bfe877fdf288f2d6ec1b4c850c7c6","versionType":"git"},{"version":"f959dcd6ddfd29235030e8026471ac1b022ad2b0","status":"affected","lessThan":"fbffbfdae55954213fea99c5c9856c48dc705019","versionType":"git"},{"version":"f959dcd6ddfd29235030e8026471ac1b022ad2b0","status":"affected","lessThan":"e81250ec6b69248b00d38c523dc6a13efaf38aab","versionType":"git"},{"version":"4e57482e8440fac7137832629109730ea4b267aa","status":"affected","versionType":"git"},{"version":"5.9.2","status":"affected","lessThan":"5.10","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hsi/controllers/omap_ssi_core.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.10","versionType":"semver"},{"version":"5.10.270","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.221","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.109","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.50","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.4","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hsi/controllers/omap_ssi_core.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/6a5426f56de98faf7886702f8720828bf346a48f"},{"url":"https://git.kernel.org/stable/c/a4beb841f84e0e6ad5ff3d114f43ad30165572dd"},{"url":"https://git.kernel.org/stable/c/9ecef057b7a7f165ce66eaf07cb4cf85d10ed9c7"},{"url":"https://git.kernel.org/stable/c/9963a65be2befff82b5f5a7cfcd7ac4aca081c0b"},{"url":"https://git.kernel.org/stable/c/e8d47e309c704df95816e7442f05947424d8b33f"},{"url":"https://git.kernel.org/stable/c/4e019e5e247bfe877fdf288f2d6ec1b4c850c7c6"},{"url":"https://git.kernel.org/stable/c/fbffbfdae55954213fea99c5c9856c48dc705019"},{"url":"https://git.kernel.org/stable/c/e81250ec6b69248b00d38c523dc6a13efaf38aab"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - The OMAP SSI HSI controller is an on-SoC serial engine used as the Nokia N900/RX-51 modem link. dma_map_sg() on the synthetic controller device is reached from local hsi_char I/O, cmt_speech, or ssi_protocol/phonet transfers, not from the network stack or a pluggable USB/Bluetooth device.\nAC:L - Any SSI payload longer than 4 bytes takes ssi_start_dma()→dma_map_sg() on ssi->device, whose dma_mask is NULL after hsi_alloc_controller(). The WARN/oops is deterministic; the attacker does not need a race or an uncontrollable memory layout.\nPR:L - hsi_char open/read/write has no capability check. On the intended OMAP3 phone deployment an unprivileged user can also drive SSI DMA through the cellular/phonet modem stack. Direct AF_PHONET sockets need CAP_SYS_ADMIN, which is not required for this highest-impact local path.\nUI:N - The attacker starts the SSI transfer or modem activity themselves; no separate victim must mount a filesystem, plug in a device, or otherwise cooperate.\nS:U - The oops, panic, and any GDD completion on the stale hsi_msg stay in the host kernel. Mapping is rejected rather than issuing IOMMU-bypassing DMA, so this is not a VM escape or DMA-boundary bypass.\nC:H - ssi_claim_lch() leaves the hsi_msg in gdd_trn after dma_map_sg() fails and ssi_async() returns that message to the client, so the observed ssi_gdd_complete()/ssi_gdd_tasklet oops is a use-after-unlink of a kernel DMA object, treated as a high-impact read primitive.\nI:H - The same leftover GDD claim lets completion list_del, dma_unmap_sg, and complete a message the client already reused or freed, corrupting kernel lists and object state; the reporter also hit an L3 interconnect abort and a NULL-pointer store in interrupt context.\nA:H - The original N900 report shows WARN_ON in dma_map_sg, an L3 nobody-cared IRQ storm, a NULL deref in ssi_gdd_tasklet, and Kernel panic - not syncing: Fatal exception in interrupt."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T08:49:26.718Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"5.10.270"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"5.15.221"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"6.1.188"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"6.6.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"6.12.109"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"6.18.50"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"7.2.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"7.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.9.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}