CVE-2022-50332 (GCVE-0-2022-50332)

Vulnerability from cvelistv5 – Published: 2025-09-15 14:49 – Updated: 2026-05-11 19:17
VLAI
Title
video/aperture: Call sysfb_disable() before removing PCI devices
Summary
In the Linux kernel, the following vulnerability has been resolved: video/aperture: Call sysfb_disable() before removing PCI devices Call sysfb_disable() from aperture_remove_conflicting_pci_devices() before removing PCI devices. Without, simpledrm can still bind to simple-framebuffer devices after the hardware driver has taken over the hardware. Both drivers interfere with each other and results are undefined. Reported modesetting errors [1] are shown below. ---- snap ---- rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks: { 13-.... } 7 jiffies s: 165 root: 0x2000/. rcu: blocking rcu_node structures (internal RCU debug): Task dump for CPU 13: task:X state:R running task stack: 0 pid: 4242 ppid: 4228 flags:0x00000008 Call Trace: <TASK> ? commit_tail+0xd7/0x130 ? drm_atomic_helper_commit+0x126/0x150 ? drm_atomic_commit+0xa4/0xe0 ? drm_plane_get_damage_clips.cold+0x1c/0x1c ? drm_atomic_helper_dirtyfb+0x19e/0x280 ? drm_mode_dirtyfb_ioctl+0x10f/0x1e0 ? drm_mode_getfb2_ioctl+0x2d0/0x2d0 ? drm_ioctl_kernel+0xc4/0x150 ? drm_ioctl+0x246/0x3f0 ? drm_mode_getfb2_ioctl+0x2d0/0x2d0 ? __x64_sys_ioctl+0x91/0xd0 ? do_syscall_64+0x60/0xd0 ? entry_SYSCALL_64_after_hwframe+0x4b/0xb5 </TASK> ... rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks: { 13-.... } 30 jiffies s: 169 root: 0x2000/. rcu: blocking rcu_node structures (internal RCU debug): Task dump for CPU 13: task:X state:R running task stack: 0 pid: 4242 ppid: 4228 flags:0x0000400e Call Trace: <TASK> ? memcpy_toio+0x76/0xc0 ? memcpy_toio+0x1b/0xc0 ? drm_fb_memcpy_toio+0x76/0xb0 ? drm_fb_blit_toio+0x75/0x2b0 ? simpledrm_simple_display_pipe_update+0x132/0x150 ? drm_atomic_helper_commit_planes+0xb6/0x230 ? drm_atomic_helper_commit_tail+0x44/0x80 ? commit_tail+0xd7/0x130 ? drm_atomic_helper_commit+0x126/0x150 ? drm_atomic_commit+0xa4/0xe0 ? drm_plane_get_damage_clips.cold+0x1c/0x1c ? drm_atomic_helper_dirtyfb+0x19e/0x280 ? drm_mode_dirtyfb_ioctl+0x10f/0x1e0 ? drm_mode_getfb2_ioctl+0x2d0/0x2d0 ? drm_ioctl_kernel+0xc4/0x150 ? drm_ioctl+0x246/0x3f0 ? drm_mode_getfb2_ioctl+0x2d0/0x2d0 ? __x64_sys_ioctl+0x91/0xd0 ? do_syscall_64+0x60/0xd0 ? entry_SYSCALL_64_after_hwframe+0x4b/0xb5 </TASK> The problem was added by commit 5e0137612430 ("video/aperture: Disable and unregister sysfb devices via aperture helpers") to v6.0.3 and does not exist in the mainline branch. The mainline commit 5e0137612430 ("video/aperture: Disable and unregister sysfb devices via aperture helpers") has been backported from v6.0-rc1 to stable v6.0.3 from a larger patch series [2] that reworks fbdev framebuffer ownership. The backport misses a change to aperture_remove_conflicting_pci_devices(). Mainline itself is fine, because the function does not exist there as a result of the patch series. Instead of backporting the whole series, fix the additional function.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: cfecfc98a78d97a49807531b5b224459bda877de , < 25a6688f27ff54f97adf7cce1d7e18c38bf51eb4 (git)
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Linux Linux Affected: 6.0.3 , < 6.0.6 (semver)
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{
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      "affected": [
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          "product": "Linux",
          "programFiles": [
            "drivers/video/aperture.c"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvideo/aperture: Call sysfb_disable() before removing PCI devices\n\nCall sysfb_disable() from aperture_remove_conflicting_pci_devices()\nbefore removing PCI devices. Without, simpledrm can still bind to\nsimple-framebuffer devices after the hardware driver has taken over\nthe hardware. Both drivers interfere with each other and results are\nundefined.\n\nReported modesetting errors [1] are shown below.\n\n---- snap ----\nrcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks: { 13-.... } 7 jiffies s: 165 root: 0x2000/.\nrcu: blocking rcu_node structures (internal RCU debug):\nTask dump for CPU 13:\ntask:X               state:R  running task     stack:    0 pid: 4242 ppid:  4228 flags:0x00000008\nCall Trace:\n \u003cTASK\u003e\n ? commit_tail+0xd7/0x130\n ? drm_atomic_helper_commit+0x126/0x150\n ? drm_atomic_commit+0xa4/0xe0\n ? drm_plane_get_damage_clips.cold+0x1c/0x1c\n ? drm_atomic_helper_dirtyfb+0x19e/0x280\n ? drm_mode_dirtyfb_ioctl+0x10f/0x1e0\n ? drm_mode_getfb2_ioctl+0x2d0/0x2d0\n ? drm_ioctl_kernel+0xc4/0x150\n ? drm_ioctl+0x246/0x3f0\n ? drm_mode_getfb2_ioctl+0x2d0/0x2d0\n ? __x64_sys_ioctl+0x91/0xd0\n ? do_syscall_64+0x60/0xd0\n ? entry_SYSCALL_64_after_hwframe+0x4b/0xb5\n \u003c/TASK\u003e\n...\nrcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks: { 13-.... } 30 jiffies s: 169 root: 0x2000/.\nrcu: blocking rcu_node structures (internal RCU debug):\nTask dump for CPU 13:\ntask:X               state:R  running task     stack:    0 pid: 4242 ppid:  4228 flags:0x0000400e\nCall Trace:\n \u003cTASK\u003e\n ? memcpy_toio+0x76/0xc0\n ? memcpy_toio+0x1b/0xc0\n ? drm_fb_memcpy_toio+0x76/0xb0\n ? drm_fb_blit_toio+0x75/0x2b0\n ? simpledrm_simple_display_pipe_update+0x132/0x150\n ? drm_atomic_helper_commit_planes+0xb6/0x230\n ? drm_atomic_helper_commit_tail+0x44/0x80\n ? commit_tail+0xd7/0x130\n ? drm_atomic_helper_commit+0x126/0x150\n ? drm_atomic_commit+0xa4/0xe0\n ? drm_plane_get_damage_clips.cold+0x1c/0x1c\n ? drm_atomic_helper_dirtyfb+0x19e/0x280\n ? drm_mode_dirtyfb_ioctl+0x10f/0x1e0\n ? drm_mode_getfb2_ioctl+0x2d0/0x2d0\n ? drm_ioctl_kernel+0xc4/0x150\n ? drm_ioctl+0x246/0x3f0\n ? drm_mode_getfb2_ioctl+0x2d0/0x2d0\n ? __x64_sys_ioctl+0x91/0xd0\n ? do_syscall_64+0x60/0xd0\n ? entry_SYSCALL_64_after_hwframe+0x4b/0xb5\n \u003c/TASK\u003e\n\nThe problem was added by commit 5e0137612430 (\"video/aperture: Disable\nand unregister sysfb devices via aperture helpers\") to v6.0.3 and does\nnot exist in the mainline branch.\n\nThe mainline commit 5e0137612430 (\"video/aperture: Disable and\nunregister sysfb devices via aperture helpers\") has been backported\nfrom v6.0-rc1 to stable v6.0.3 from a larger patch series [2] that\nreworks fbdev framebuffer ownership. The backport misses a change to\naperture_remove_conflicting_pci_devices(). Mainline itself is fine,\nbecause the function does not exist there as a result of the patch\nseries.\n\nInstead of backporting the whole series, fix the additional function."
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        "dateUpdated": "2026-05-11T19:17:24.374Z",
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      }
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    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50332",
    "datePublished": "2025-09-15T14:49:42.733Z",
    "dateReserved": "2025-09-15T14:18:36.816Z",
    "dateUpdated": "2026-05-11T19:17:24.374Z",
    "state": "PUBLISHED"
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      "date": "2026-09-29",
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      "percentile": "0.0241"
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        "configurations": [
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        "descriptions": [
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            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvideo/aperture: Call sysfb_disable() before removing PCI devices\n\nCall sysfb_disable() from aperture_remove_conflicting_pci_devices()\nbefore removing PCI devices. Without, simpledrm can still bind to\nsimple-framebuffer devices after the hardware driver has taken over\nthe hardware. Both drivers interfere with each other and results are\nundefined.\n\nReported modesetting errors [1] are shown below.\n\n---- snap ----\nrcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks: { 13-.... } 7 jiffies s: 165 root: 0x2000/.\nrcu: blocking rcu_node structures (internal RCU debug):\nTask dump for CPU 13:\ntask:X               state:R  running task     stack:    0 pid: 4242 ppid:  4228 flags:0x00000008\nCall Trace:\n \u003cTASK\u003e\n ? commit_tail+0xd7/0x130\n ? drm_atomic_helper_commit+0x126/0x150\n ? drm_atomic_commit+0xa4/0xe0\n ? drm_plane_get_damage_clips.cold+0x1c/0x1c\n ? drm_atomic_helper_dirtyfb+0x19e/0x280\n ? drm_mode_dirtyfb_ioctl+0x10f/0x1e0\n ? drm_mode_getfb2_ioctl+0x2d0/0x2d0\n ? drm_ioctl_kernel+0xc4/0x150\n ? drm_ioctl+0x246/0x3f0\n ? drm_mode_getfb2_ioctl+0x2d0/0x2d0\n ? __x64_sys_ioctl+0x91/0xd0\n ? do_syscall_64+0x60/0xd0\n ? entry_SYSCALL_64_after_hwframe+0x4b/0xb5\n \u003c/TASK\u003e\n...\nrcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks: { 13-.... } 30 jiffies s: 169 root: 0x2000/.\nrcu: blocking rcu_node structures (internal RCU debug):\nTask dump for CPU 13:\ntask:X               state:R  running task     stack:    0 pid: 4242 ppid:  4228 flags:0x0000400e\nCall Trace:\n \u003cTASK\u003e\n ? memcpy_toio+0x76/0xc0\n ? memcpy_toio+0x1b/0xc0\n ? drm_fb_memcpy_toio+0x76/0xb0\n ? drm_fb_blit_toio+0x75/0x2b0\n ? simpledrm_simple_display_pipe_update+0x132/0x150\n ? drm_atomic_helper_commit_planes+0xb6/0x230\n ? drm_atomic_helper_commit_tail+0x44/0x80\n ? commit_tail+0xd7/0x130\n ? drm_atomic_helper_commit+0x126/0x150\n ? drm_atomic_commit+0xa4/0xe0\n ? drm_plane_get_damage_clips.cold+0x1c/0x1c\n ? drm_atomic_helper_dirtyfb+0x19e/0x280\n ? drm_mode_dirtyfb_ioctl+0x10f/0x1e0\n ? drm_mode_getfb2_ioctl+0x2d0/0x2d0\n ? drm_ioctl_kernel+0xc4/0x150\n ? drm_ioctl+0x246/0x3f0\n ? drm_mode_getfb2_ioctl+0x2d0/0x2d0\n ? __x64_sys_ioctl+0x91/0xd0\n ? do_syscall_64+0x60/0xd0\n ? entry_SYSCALL_64_after_hwframe+0x4b/0xb5\n \u003c/TASK\u003e\n\nThe problem was added by commit 5e0137612430 (\"video/aperture: Disable\nand unregister sysfb devices via aperture helpers\") to v6.0.3 and does\nnot exist in the mainline branch.\n\nThe mainline commit 5e0137612430 (\"video/aperture: Disable and\nunregister sysfb devices via aperture helpers\") has been backported\nfrom v6.0-rc1 to stable v6.0.3 from a larger patch series [2] that\nreworks fbdev framebuffer ownership. The backport misses a change to\naperture_remove_conflicting_pci_devices(). Mainline itself is fine,\nbecause the function does not exist there as a result of the patch\nseries.\n\nInstead of backporting the whole series, fix the additional function."
          }
        ],
        "id": "CVE-2022-50332",
        "lastModified": "2026-06-17T05:23:15.157",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 5.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 3.6,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2025-09-15T15:15:45.427",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/25a6688f27ff54f97adf7cce1d7e18c38bf51eb4"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "NVD-CWE-noinfo"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-06-30T10:37:27+00:00",
      "cve": "CVE-2022-50332",
      "id": "CVE-2022-50332",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_affected": "156",
      "product_status:known_not_affected": "118",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel: Denial of Service due to improper PCI device handling in aperture driver",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50332.json",
      "version": "3"
    }
  }
}



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