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CVE-2026-89594 (GCVE-0-2026-89594)

Vulnerability from cvelistv5 – Published: 2026-09-11 19:44 – Updated: 2026-09-14 12:01
VLAI
Title
hsi: omap_ssi_core: fix missing DMA mask setup for SSI controller device
Summary
In the Linux kernel, the following vulnerability has been resolved: hsi: omap_ssi_core: fix missing DMA mask setup for SSI controller device The OMAP SSI driver uses a synthetic HSI controller device allocated via hsi_alloc_controller(), which does not go through the normal OF/platform device initialization path. As a result, the embedded struct device does not have a DMA mask initialized by default. After recent DMA API hardening changes, dma_map_sg() and related helpers now require a valid dma_mask to be present, otherwise the driver may crash or trigger warnings when attempting DMA mapping operations. Fix this by explicitly initializing the DMA mask for the SSI controller device and setting a 32-bit DMA mask, which matches the hardware capabilities.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: f959dcd6ddfd29235030e8026471ac1b022ad2b0 , < 6a5426f56de98faf7886702f8720828bf346a48f (git)
Affected: f959dcd6ddfd29235030e8026471ac1b022ad2b0 , < a4beb841f84e0e6ad5ff3d114f43ad30165572dd (git)
Affected: f959dcd6ddfd29235030e8026471ac1b022ad2b0 , < 9ecef057b7a7f165ce66eaf07cb4cf85d10ed9c7 (git)
Affected: f959dcd6ddfd29235030e8026471ac1b022ad2b0 , < 9963a65be2befff82b5f5a7cfcd7ac4aca081c0b (git)
Affected: f959dcd6ddfd29235030e8026471ac1b022ad2b0 , < e8d47e309c704df95816e7442f05947424d8b33f (git)
Affected: f959dcd6ddfd29235030e8026471ac1b022ad2b0 , < 4e019e5e247bfe877fdf288f2d6ec1b4c850c7c6 (git)
Affected: f959dcd6ddfd29235030e8026471ac1b022ad2b0 , < fbffbfdae55954213fea99c5c9856c48dc705019 (git)
Affected: f959dcd6ddfd29235030e8026471ac1b022ad2b0 , < e81250ec6b69248b00d38c523dc6a13efaf38aab (git)
Affected: 4e57482e8440fac7137832629109730ea4b267aa (git)
Affected: 5.9.2 , < 5.10 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 5.10
Unaffected: 0 , < 5.10 (semver)
Unaffected: 5.10.270 , ≤ 5.10.* (semver)
Unaffected: 5.15.221 , ≤ 5.15.* (semver)
Unaffected: 6.1.188 , ≤ 6.1.* (semver)
Unaffected: 6.6.157 , ≤ 6.6.* (semver)
Unaffected: 6.12.109 , ≤ 6.12.* (semver)
Unaffected: 6.18.50 , ≤ 6.18.* (semver)
Unaffected: 7.2.4 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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          "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."
        }
      ],
      "metrics": [
        {
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "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()\u2192dma_map_sg() on ssi-\u003edevice, 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."
            }
          ]
        }
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/6a5426f56de98faf7886702f8720828bf346a48f"
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          "url": "https://git.kernel.org/stable/c/a4beb841f84e0e6ad5ff3d114f43ad30165572dd"
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        {
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      ],
      "title": "hsi: omap_ssi_core: fix missing DMA mask setup for SSI controller device",
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    "datePublished": "2026-09-11T19:44:57.291Z",
    "dateReserved": "2026-09-11T19:38:34.730Z",
    "dateUpdated": "2026-09-14T12:01:17.110Z",
    "state": "PUBLISHED"
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      "title": "hsi: omap_ssi_core: fix missing DMA mask setup for SSI controller device",
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controller\\ndevice and setting a 32-bit DMA mask, which matches the hardware\\ncapabilities.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/hsi/controllers/omap_ssi_core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"f959dcd6ddfd29235030e8026471ac1b022ad2b0\",\"lessThan\":\"6a5426f56de98faf7886702f8720828bf346a48f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f959dcd6ddfd29235030e8026471ac1b022ad2b0\",\"lessThan\":\"a4beb841f84e0e6ad5ff3d114f43ad30165572dd\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f959dcd6ddfd29235030e8026471ac1b022ad2b0\",\"lessThan\":\"9ecef057b7a7f165ce66eaf07cb4cf85d10ed9c7\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f959dcd6ddfd29235030e8026471ac1b022ad2b0\",\"lessThan\":\"9963a65be2befff82b5f5a7cfcd7ac4aca081c0b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f959dcd6ddfd29235030e8026471ac1b022ad2b0\",\"lessThan\":\"e8d47e309c704df95816e7442f05947424d8b33f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f959dcd6ddfd29235030e8026471ac1b022ad2b0\",\"lessThan\":\"4e019e5e247bfe877fdf288f2d6ec1b4c850c7c6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f959dcd6ddfd29235030e8026471ac1b022ad2b0\",\"lessThan\":\"fbffbfdae55954213fea99c5c9856c48dc705019\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f959dcd6ddfd29235030e8026471ac1b022ad2b0\",\"lessThan\":\"e81250ec6b69248b00d38c523dc6a13efaf38aab\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4e57482e8440fac7137832629109730ea4b267aa\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5.9.2\",\"lessThan\":\"5.10\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/hsi/controllers/omap_ssi_core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.10\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.10\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.270\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.221\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.188\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.157\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.109\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.50\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2.4\",\"lessThanOrEqual\":\"7.2.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.3-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"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\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/4e019e5e247bfe877fdf288f2d6ec1b4c850c7c6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6a5426f56de98faf7886702f8720828bf346a48f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9963a65be2befff82b5f5a7cfcd7ac4aca081c0b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9ecef057b7a7f165ce66eaf07cb4cf85d10ed9c7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a4beb841f84e0e6ad5ff3d114f43ad30165572dd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e81250ec6b69248b00d38c523dc6a13efaf38aab\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e8d47e309c704df95816e7442f05947424d8b33f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/fbffbfdae55954213fea99c5c9856c48dc705019\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-09-15T05:47:04+00:00",
      "cve": "CVE-2026-89594",
      "id": "CVE-2026-89594",
      "initial_release_date": "2026-09-11T00:00:00+00:00",
      "product_status:known_not_affected": "276",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: hsi: omap_ssi_core: fix missing DMA mask setup for SSI controller device",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89594.json",
      "version": "3"
    }
  }
}



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Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.