CVE-2026-90316 (GCVE-0-2026-90316)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:08 – Updated: 2026-09-18 17:54
VLAI
Title
drm/omap: dsi: Do not copy isr table
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/omap: dsi: Do not copy isr table To be able to unregister stuff from isrs, the corresponding table was copied. Nobody seems to unregister stuff that way, so it does not help. But there are stack-allocated objects passed to these isrs giving chances of UAF of these objects if irqs are unregistered while they are handled, so better do not copy that table.
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: 4ae2ddddf44cd9f73def2dbdb68c6859072262ff , < b3cbd1451c240446ce170f514244e1cb65ec0de4 (git)
Affected: 4ae2ddddf44cd9f73def2dbdb68c6859072262ff , < f6733460b6d483dea7bfb5cfceb11cbff31a60b7 (git)
Affected: 4ae2ddddf44cd9f73def2dbdb68c6859072262ff , < 542a6a3ec77cd29f953987f7263f32fb8acb097e (git)
Affected: 4ae2ddddf44cd9f73def2dbdb68c6859072262ff , < 2c27a84ba8d1bfed046d0067161d92001605accc (git)
Affected: 4ae2ddddf44cd9f73def2dbdb68c6859072262ff , < 9063b30faae8ccaacf003735560df3956dbb592f (git)
Affected: 4ae2ddddf44cd9f73def2dbdb68c6859072262ff , < 30810bdf273b4c93f8731b96a7204f33e052180d (git)
Affected: 4ae2ddddf44cd9f73def2dbdb68c6859072262ff , < 97c03b32b28a9f7f13f768f2b06e1eaafe850e66 (git)
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Linux Linux Affected: 2.6.39
Unaffected: 0 , < 2.6.39 (semver)
Unaffected: 5.15.221 , ≤ 5.15.* (semver)
Unaffected: 6.1.188 , ≤ 6.1.* (semver)
Unaffected: 6.6.157 , ≤ 6.6.* (semver)
Unaffected: 6.12.110 , ≤ 6.12.* (semver)
Unaffected: 6.18.52 , ≤ 6.18.* (semver)
Unaffected: 7.2.6 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
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{
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          "product": "Linux",
          "programFiles": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/omap: dsi: Do not copy isr table\n\nTo be able to unregister stuff from isrs, the corresponding table was\ncopied.  Nobody seems to unregister stuff that way, so it does not help.\nBut there are stack-allocated objects passed to these isrs giving chances\nof UAF of these objects if irqs are unregistered while they are handled,\nso better do not copy that table."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "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 UAF is reached from local DRM_IOCTL_MODE_ATOMIC on /dev/dri/card*: dsi_bridge_disable()\u2192dsi_disable()\u2192dsi_sync_vc(), or a command-mode pageflip via omap_crtc_flush()\u2192dsi_update_channel()\u2192_dsi_send_nop()\u2192dsi_vc_send_bta_sync(). Those register stack objects that omap_dsi_irq_handler() later fires from isr_tables_copy; no remote protocol carries this.\nAC:L - The attacker repeats those commits/pageflips so dsi_vc_send_bta_sync()/dsi_sync_vc_vp() register a stack completion then dsi_unregister_isr_vc() after wait_for_completion_timeout(), while DSI BTA/PACKET_SENT IRQs run omap_dsi_irq_handler() on another CPU against the copied table; both sides of the copy-vs-unregister race are attacker-driven.\nPR:L - DRM_IOCTL_MODE_ATOMIC is gated by DRM_MASTER in drm_ioctl_permit(), not CAP_SYS_ADMIN. drm_master_open() makes the first opener of an unclaimed omapdrm card the master, and a seat/video-group user on AM57x/OMAP DSI hardware typically holds that; this is ordinary local privilege, not init-namespace root.\nUI:N - The attacker opens /dev/dri/card* and submits their own atomic commits or dirty/page-flip ioctls that call dsi_vc_send_bta_sync() or dsi_sync_vc(); no other user must mount media, confirm a prompt, or attach a panel.\nS:U - dsi_call_isrs() running dsi_completion_handler()/dsi_packet_sent_handler_vp() corrupts kernel stack in the same kernel that hosts omapdrm; this is local kernel memory corruption, not a VM, IOMMU, or sandbox-boundary escape.\nC:H - dsi_call_isrs() invokes dsi_packet_sent_handler_vp/l4 with isr_data-\u003earg still pointing at a returned dsi_packet_sent_handler_data / DECLARE_COMPLETION_ONSTACK frame; after reuse that object is read as a fake dsi pointer through dsi_read_reg()/REG_GET, which is a UAF read of kernel memory.\nI:H - The same dangling arg is passed to complete() in dsi_completion_handler and to complete(vp_data-\u003ecompletion) in the packet-sent handlers; a reused stack slot that overwrites the completion pointer lets complete() lock and wake a wait-queue at an attacker-influenced address, a kernel write/control-flow hijack.\nA:H - complete() on a freed stack completion, or dsi_read_reg() through a dangling dsi_data in dsi_packet_sent_handler_vp, oopses or panics the kernel even if the UAF is not turned into a full write primitive."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-18T17:54:31.233Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/b3cbd1451c240446ce170f514244e1cb65ec0de4"
        },
        {
          "url": "https://git.kernel.org/stable/c/f6733460b6d483dea7bfb5cfceb11cbff31a60b7"
        },
        {
          "url": "https://git.kernel.org/stable/c/542a6a3ec77cd29f953987f7263f32fb8acb097e"
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        {
          "url": "https://git.kernel.org/stable/c/97c03b32b28a9f7f13f768f2b06e1eaafe850e66"
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      "title": "drm/omap: dsi: Do not copy isr table",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-90316",
    "datePublished": "2026-09-17T16:08:34.875Z",
    "dateReserved": "2026-09-11T19:38:34.801Z",
    "dateUpdated": "2026-09-18T17:54:31.233Z",
    "state": "PUBLISHED"
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  "dataVersion": "5.2",
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      "date": "2026-09-25",
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                "programFiles": [
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            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/omap: dsi: Do not copy isr table\n\nTo be able to unregister stuff from isrs, the corresponding table was\ncopied.  Nobody seems to unregister stuff that way, so it does not help.\nBut there are stack-allocated objects passed to these isrs giving chances\nof UAF of these objects if irqs are unregistered while they are handled,\nso better do not copy that table."
          }
        ],
        "id": "CVE-2026-90316",
        "lastModified": "2026-09-18T18:17:53.277",
        "metrics": {
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            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
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              "impactScore": 5.9,
              "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
              "type": "Secondary"
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        "published": "2026-09-17T17:17:29.443",
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          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    }
  }
}



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