Vulnerability-Lookup

FKIE_CVE-2022-50652

Vulnerability from fkie_nvd - Published: 2025-12-09 01:16 - Updated: 2026-06-17 05:23

Severity

Summary

In the Linux kernel, the following vulnerability has been resolved: uio: uio_dmem_genirq: Fix missing unlock in irq configuration Commit b74351287d4b ("uio: fix a sleep-in-atomic-context bug in uio_dmem_genirq_irqcontrol()") started calling disable_irq() without holding the spinlock because it can sleep. However, that fix introduced another bug: if interrupt is already disabled and a new disable request comes in, then the spinlock is not unlocked: root@localhost:~# printf '\x00\x00\x00\x00' > /dev/uio0 root@localhost:~# printf '\x00\x00\x00\x00' > /dev/uio0 root@localhost:~# [ 14.851538] BUG: scheduling while atomic: bash/223/0x00000002 [ 14.851991] Modules linked in: uio_dmem_genirq uio myfpga(OE) bochs drm_vram_helper drm_ttm_helper ttm drm_kms_helper drm snd_pcm ppdev joydev psmouse snd_timer snd e1000fb_sys_fops syscopyarea parport sysfillrect soundcore sysimgblt input_leds pcspkr i2c_piix4 serio_raw floppy evbug qemu_fw_cfg mac_hid pata_acpi ip_tables x_tables autofs4 [last unloaded: parport_pc] [ 14.854206] CPU: 0 PID: 223 Comm: bash Tainted: G OE 6.0.0-rc7 #21 [ 14.854786] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014 [ 14.855664] Call Trace: [ 14.855861] <TASK> [ 14.856025] dump_stack_lvl+0x4d/0x67 [ 14.856325] dump_stack+0x14/0x1a [ 14.856583] __schedule_bug.cold+0x4b/0x5c [ 14.856915] __schedule+0xe81/0x13d0 [ 14.857199] ? idr_find+0x13/0x20 [ 14.857456] ? get_work_pool+0x2d/0x50 [ 14.857756] ? __flush_work+0x233/0x280 [ 14.858068] ? __schedule+0xa95/0x13d0 [ 14.858307] ? idr_find+0x13/0x20 [ 14.858519] ? get_work_pool+0x2d/0x50 [ 14.858798] schedule+0x6c/0x100 [ 14.859009] schedule_hrtimeout_range_clock+0xff/0x110 [ 14.859335] ? tty_write_room+0x1f/0x30 [ 14.859598] ? n_tty_poll+0x1ec/0x220 [ 14.859830] ? tty_ldisc_deref+0x1a/0x20 [ 14.860090] schedule_hrtimeout_range+0x17/0x20 [ 14.860373] do_select+0x596/0x840 [ 14.860627] ? __kernel_text_address+0x16/0x50 [ 14.860954] ? poll_freewait+0xb0/0xb0 [ 14.861235] ? poll_freewait+0xb0/0xb0 [ 14.861517] ? rpm_resume+0x49d/0x780 [ 14.861798] ? common_interrupt+0x59/0xa0 [ 14.862127] ? asm_common_interrupt+0x2b/0x40 [ 14.862511] ? __uart_start.isra.0+0x61/0x70 [ 14.862902] ? __check_object_size+0x61/0x280 [ 14.863255] core_sys_select+0x1c6/0x400 [ 14.863575] ? vfs_write+0x1c9/0x3d0 [ 14.863853] ? vfs_write+0x1c9/0x3d0 [ 14.864121] ? _copy_from_user+0x45/0x70 [ 14.864526] do_pselect.constprop.0+0xb3/0xf0 [ 14.864893] ? do_syscall_64+0x6d/0x90 [ 14.865228] ? do_syscall_64+0x6d/0x90 [ 14.865556] __x64_sys_pselect6+0x76/0xa0 [ 14.865906] do_syscall_64+0x60/0x90 [ 14.866214] ? syscall_exit_to_user_mode+0x2a/0x50 [ 14.866640] ? do_syscall_64+0x6d/0x90 [ 14.866972] ? do_syscall_64+0x6d/0x90 [ 14.867286] ? do_syscall_64+0x6d/0x90 [ 14.867626] entry_SYSCALL_64_after_hwframe+0x63/0xcd [...] stripped [ 14.872959] </TASK> ('myfpga' is a simple 'uio_dmem_genirq' driver I wrote to test this) The implementation of "uio_dmem_genirq" was based on "uio_pdrv_genirq" and it is used in a similar manner to the "uio_pdrv_genirq" driver with respect to interrupt configuration and handling. At the time "uio_dmem_genirq" was introduced, both had the same implementation of the 'uio_info' handlers irqcontrol() and handler(). Then commit 34cb27528398 ("UIO: Fix concurrency issue"), which was only applied to "uio_pdrv_genirq", ended up making them a little different. That commit, among other things, changed disable_irq() to disable_irq_nosync() in the implementation of irqcontrol(). The motivation there was to avoid a deadlock between irqcontrol() and handler(), since it added a spinlock in the irq handler, and disable_irq() waits for the completion of the irq handler. By changing disable_irq() to disable_irq_nosync() in irqcontrol(), we also avoid the sleeping-whil ---truncated---

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/030b6c7bb1e4edebaee2b1e48fbcc9cd5998d51d
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/79a4bdb6b9920134af1a4738a1fa36a0438cd905
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9977cb7af5a8f4738198b020436e2e56c5cd721e
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9bf7a0b2b15cd12e15f7858072bd89933746de67
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9de255c461d1b3f0242b3ad1450c3323a3e00b34
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a323d24a0183be730d2398b11b3a91e5c2e222a0
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ac5585bb06a2e82177269bee93e59887ce591106
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/eca77a25a7cb3201738f4b55b9b8fa1089d7d002
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ee180e867ce4b2f744799247b81050b3e5dd62cd

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/uio/uio_dmem_genirq.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "9977cb7af5a8f4738198b020436e2e56c5cd721e",
              "status": "affected",
              "version": "b77fa964ecb1d72a671234f5bea95b41f77c233a",
              "versionType": "git"
            },
            {
              "lessThan": "a323d24a0183be730d2398b11b3a91e5c2e222a0",
              "status": "affected",
              "version": "0151b03f43f2d295a6949454434074b34a262e06",
              "versionType": "git"
            },
            {
              "lessThan": "ac5585bb06a2e82177269bee93e59887ce591106",
              "status": "affected",
              "version": "ea6b7b1d58790ffb36bace723f6e62a1c8595c77",
              "versionType": "git"
            },
            {
              "lessThan": "eca77a25a7cb3201738f4b55b9b8fa1089d7d002",
              "status": "affected",
              "version": "750a95d63746458e86c6d92dfad48a05c64d0ecd",
              "versionType": "git"
            },
            {
              "lessThan": "9bf7a0b2b15cd12e15f7858072bd89933746de67",
              "status": "affected",
              "version": "b74351287d4bd90636c3f48bc188c2f53824c2d4",
              "versionType": "git"
            },
            {
              "lessThan": "79a4bdb6b9920134af1a4738a1fa36a0438cd905",
              "status": "affected",
              "version": "b74351287d4bd90636c3f48bc188c2f53824c2d4",
              "versionType": "git"
            },
            {
              "lessThan": "030b6c7bb1e4edebaee2b1e48fbcc9cd5998d51d",
              "status": "affected",
              "version": "b74351287d4bd90636c3f48bc188c2f53824c2d4",
              "versionType": "git"
            },
            {
              "lessThan": "ee180e867ce4b2f744799247b81050b3e5dd62cd",
              "status": "affected",
              "version": "b74351287d4bd90636c3f48bc188c2f53824c2d4",
              "versionType": "git"
            },
            {
              "lessThan": "9de255c461d1b3f0242b3ad1450c3323a3e00b34",
              "status": "affected",
              "version": "b74351287d4bd90636c3f48bc188c2f53824c2d4",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "4a117a1c581623d04bf09aa7455d8e7b66e8bb85",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "1d52cd8b52876145b0f6344be95fc750e30d9ecb",
              "versionType": "git"
            },
            {
              "lessThan": "4.9.337",
              "status": "affected",
              "version": "4.9.215",
              "versionType": "semver"
            },
            {
              "lessThan": "4.14.303",
              "status": "affected",
              "version": "4.14.172",
              "versionType": "semver"
            },
            {
              "lessThan": "4.19.270",
              "status": "affected",
              "version": "4.19.106",
              "versionType": "semver"
            },
            {
              "lessThan": "5.4.229",
              "status": "affected",
              "version": "5.4.22",
              "versionType": "semver"
            },
            {
              "lessThan": "4.5",
              "status": "affected",
              "version": "4.4.215",
              "versionType": "semver"
            },
            {
              "lessThan": "5.6",
              "status": "affected",
              "version": "5.5.6",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/uio/uio_dmem_genirq.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.6"
            },
            {
              "lessThan": "5.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.9.*",
              "status": "unaffected",
              "version": "4.9.337",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.303",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.229",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.163",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.86",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nuio: uio_dmem_genirq: Fix missing unlock in irq configuration\n\nCommit b74351287d4b (\"uio: fix a sleep-in-atomic-context bug in\nuio_dmem_genirq_irqcontrol()\") started calling disable_irq() without\nholding the spinlock because it can sleep. However, that fix introduced\nanother bug: if interrupt is already disabled and a new disable request\ncomes in, then the spinlock is not unlocked:\n\nroot@localhost:~# printf \u0027\\x00\\x00\\x00\\x00\u0027 \u003e /dev/uio0\nroot@localhost:~# printf \u0027\\x00\\x00\\x00\\x00\u0027 \u003e /dev/uio0\nroot@localhost:~# [   14.851538] BUG: scheduling while atomic: bash/223/0x00000002\n[   14.851991] Modules linked in: uio_dmem_genirq uio myfpga(OE) bochs drm_vram_helper drm_ttm_helper ttm drm_kms_helper drm snd_pcm ppdev joydev psmouse snd_timer snd e1000fb_sys_fops syscopyarea parport sysfillrect soundcore sysimgblt input_leds pcspkr i2c_piix4 serio_raw floppy evbug qemu_fw_cfg mac_hid pata_acpi ip_tables x_tables autofs4 [last unloaded: parport_pc]\n[   14.854206] CPU: 0 PID: 223 Comm: bash Tainted: G           OE      6.0.0-rc7 #21\n[   14.854786] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014\n[   14.855664] Call Trace:\n[   14.855861]  \u003cTASK\u003e\n[   14.856025]  dump_stack_lvl+0x4d/0x67\n[   14.856325]  dump_stack+0x14/0x1a\n[   14.856583]  __schedule_bug.cold+0x4b/0x5c\n[   14.856915]  __schedule+0xe81/0x13d0\n[   14.857199]  ? idr_find+0x13/0x20\n[   14.857456]  ? get_work_pool+0x2d/0x50\n[   14.857756]  ? __flush_work+0x233/0x280\n[   14.858068]  ? __schedule+0xa95/0x13d0\n[   14.858307]  ? idr_find+0x13/0x20\n[   14.858519]  ? get_work_pool+0x2d/0x50\n[   14.858798]  schedule+0x6c/0x100\n[   14.859009]  schedule_hrtimeout_range_clock+0xff/0x110\n[   14.859335]  ? tty_write_room+0x1f/0x30\n[   14.859598]  ? n_tty_poll+0x1ec/0x220\n[   14.859830]  ? tty_ldisc_deref+0x1a/0x20\n[   14.860090]  schedule_hrtimeout_range+0x17/0x20\n[   14.860373]  do_select+0x596/0x840\n[   14.860627]  ? __kernel_text_address+0x16/0x50\n[   14.860954]  ? poll_freewait+0xb0/0xb0\n[   14.861235]  ? poll_freewait+0xb0/0xb0\n[   14.861517]  ? rpm_resume+0x49d/0x780\n[   14.861798]  ? common_interrupt+0x59/0xa0\n[   14.862127]  ? asm_common_interrupt+0x2b/0x40\n[   14.862511]  ? __uart_start.isra.0+0x61/0x70\n[   14.862902]  ? __check_object_size+0x61/0x280\n[   14.863255]  core_sys_select+0x1c6/0x400\n[   14.863575]  ? vfs_write+0x1c9/0x3d0\n[   14.863853]  ? vfs_write+0x1c9/0x3d0\n[   14.864121]  ? _copy_from_user+0x45/0x70\n[   14.864526]  do_pselect.constprop.0+0xb3/0xf0\n[   14.864893]  ? do_syscall_64+0x6d/0x90\n[   14.865228]  ? do_syscall_64+0x6d/0x90\n[   14.865556]  __x64_sys_pselect6+0x76/0xa0\n[   14.865906]  do_syscall_64+0x60/0x90\n[   14.866214]  ? syscall_exit_to_user_mode+0x2a/0x50\n[   14.866640]  ? do_syscall_64+0x6d/0x90\n[   14.866972]  ? do_syscall_64+0x6d/0x90\n[   14.867286]  ? do_syscall_64+0x6d/0x90\n[   14.867626]  entry_SYSCALL_64_after_hwframe+0x63/0xcd\n[...] stripped\n[   14.872959]  \u003c/TASK\u003e\n\n(\u0027myfpga\u0027 is a simple \u0027uio_dmem_genirq\u0027 driver I wrote to test this)\n\nThe implementation of \"uio_dmem_genirq\" was based on \"uio_pdrv_genirq\" and\nit is used in a similar manner to the \"uio_pdrv_genirq\" driver with respect\nto interrupt configuration and handling. At the time \"uio_dmem_genirq\" was\nintroduced, both had the same implementation of the \u0027uio_info\u0027 handlers\nirqcontrol() and handler(). Then commit 34cb27528398 (\"UIO: Fix concurrency\nissue\"), which was only applied to \"uio_pdrv_genirq\", ended up making them\na little different. That commit, among other things, changed disable_irq()\nto disable_irq_nosync() in the implementation of irqcontrol(). The\nmotivation there was to avoid a deadlock between irqcontrol() and\nhandler(), since it added a spinlock in the irq handler, and disable_irq()\nwaits for the completion of the irq handler.\n\nBy changing disable_irq() to disable_irq_nosync() in irqcontrol(), we also\navoid the sleeping-whil\n---truncated---"
    }
  ],
  "id": "CVE-2022-50652",
  "lastModified": "2026-06-17T05:23:56.183",
  "metrics": {},
  "published": "2025-12-09T01:16:48.063",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/030b6c7bb1e4edebaee2b1e48fbcc9cd5998d51d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/79a4bdb6b9920134af1a4738a1fa36a0438cd905"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9977cb7af5a8f4738198b020436e2e56c5cd721e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9bf7a0b2b15cd12e15f7858072bd89933746de67"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9de255c461d1b3f0242b3ad1450c3323a3e00b34"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a323d24a0183be730d2398b11b3a91e5c2e222a0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ac5585bb06a2e82177269bee93e59887ce591106"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/eca77a25a7cb3201738f4b55b9b8fa1089d7d002"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ee180e867ce4b2f744799247b81050b3e5dd62cd"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Deferred"
}

CVE-2022-50652 (GCVE-0-2022-50652)

Vulnerability from cvelistv5 – Published: 2025-12-09 00:00 – Updated: 2026-05-23 15:24

Title

uio: uio_dmem_genirq: Fix missing unlock in irq configuration

Summary

Severity

No CVSS data available.

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 6637 records in the last 180 days details

References

9 references

URL	Tags
https://git.kernel.org/stable/c/9977cb7af5a8f4738…
https://git.kernel.org/stable/c/a323d24a0183be730…
https://git.kernel.org/stable/c/ac5585bb06a2e8217…
https://git.kernel.org/stable/c/eca77a25a7cb32017…
https://git.kernel.org/stable/c/9bf7a0b2b15cd12e1…
https://git.kernel.org/stable/c/79a4bdb6b9920134a…
https://git.kernel.org/stable/c/030b6c7bb1e4edeba…
https://git.kernel.org/stable/c/ee180e867ce4b2f74…
https://git.kernel.org/stable/c/9de255c461d1b3f02…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: b77fa964ecb1d72a671234f5bea95b41f77c233a , < 9977cb7af5a8f4738198b020436e2e56c5cd721e (git) Affected: 0151b03f43f2d295a6949454434074b34a262e06 , < a323d24a0183be730d2398b11b3a91e5c2e222a0 (git) Affected: ea6b7b1d58790ffb36bace723f6e62a1c8595c77 , < ac5585bb06a2e82177269bee93e59887ce591106 (git) Affected: 750a95d63746458e86c6d92dfad48a05c64d0ecd , < eca77a25a7cb3201738f4b55b9b8fa1089d7d002 (git) Affected: b74351287d4bd90636c3f48bc188c2f53824c2d4 , < 9bf7a0b2b15cd12e15f7858072bd89933746de67 (git) Affected: b74351287d4bd90636c3f48bc188c2f53824c2d4 , < 79a4bdb6b9920134af1a4738a1fa36a0438cd905 (git) Affected: b74351287d4bd90636c3f48bc188c2f53824c2d4 , < 030b6c7bb1e4edebaee2b1e48fbcc9cd5998d51d (git) Affected: b74351287d4bd90636c3f48bc188c2f53824c2d4 , < ee180e867ce4b2f744799247b81050b3e5dd62cd (git) Affected: b74351287d4bd90636c3f48bc188c2f53824c2d4 , < 9de255c461d1b3f0242b3ad1450c3323a3e00b34 (git) Affected: 4a117a1c581623d04bf09aa7455d8e7b66e8bb85 (git) Affected: 1d52cd8b52876145b0f6344be95fc750e30d9ecb (git) Affected: 4.9.215 , < 4.9.337 (semver) Affected: 4.14.172 , < 4.14.303 (semver) Affected: 4.19.106 , < 4.19.270 (semver) Affected: 5.4.22 , < 5.4.229 (semver) Affected: 4.4.215 , < 4.5 (semver) Affected: 5.5.6 , < 5.6 (semver)
Linux	Linux	Affected: 5.6 Unaffected: 0 , < 5.6 (semver) Unaffected: 4.9.337 , ≤ 4.9.* (semver) Unaffected: 4.14.303 , ≤ 4.14.* (semver) Unaffected: 4.19.270 , ≤ 4.19.* (semver) Unaffected: 5.4.229 , ≤ 5.4.* (semver) Unaffected: 5.10.163 , ≤ 5.10.* (semver) Unaffected: 5.15.86 , ≤ 5.15.* (semver) Unaffected: 6.0.16 , ≤ 6.0.* (semver) Unaffected: 6.1.2 , ≤ 6.1.* (semver) Unaffected: 6.2 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/uio/uio_dmem_genirq.c"
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              "versionType": "git"
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              "versionType": "git"
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              "status": "affected",
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              "versionType": "git"
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              "status": "affected",
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              "versionType": "git"
            },
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              "status": "affected",
              "version": "b74351287d4bd90636c3f48bc188c2f53824c2d4",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "4a117a1c581623d04bf09aa7455d8e7b66e8bb85",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "1d52cd8b52876145b0f6344be95fc750e30d9ecb",
              "versionType": "git"
            },
            {
              "lessThan": "4.9.337",
              "status": "affected",
              "version": "4.9.215",
              "versionType": "semver"
            },
            {
              "lessThan": "4.14.303",
              "status": "affected",
              "version": "4.14.172",
              "versionType": "semver"
            },
            {
              "lessThan": "4.19.270",
              "status": "affected",
              "version": "4.19.106",
              "versionType": "semver"
            },
            {
              "lessThan": "5.4.229",
              "status": "affected",
              "version": "5.4.22",
              "versionType": "semver"
            },
            {
              "lessThan": "4.5",
              "status": "affected",
              "version": "4.4.215",
              "versionType": "semver"
            },
            {
              "lessThan": "5.6",
              "status": "affected",
              "version": "5.5.6",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/uio/uio_dmem_genirq.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.6"
            },
            {
              "lessThan": "5.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.9.*",
              "status": "unaffected",
              "version": "4.9.337",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.303",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.229",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.163",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.86",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.9.337",
                  "versionStartIncluding": "4.9.215",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.14.303",
                  "versionStartIncluding": "4.14.172",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.270",
                  "versionStartIncluding": "4.19.106",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.229",
                  "versionStartIncluding": "5.4.22",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.163",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.86",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0.16",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.2",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.2",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "4.4.215",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "5.5.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nuio: uio_dmem_genirq: Fix missing unlock in irq configuration\n\nCommit b74351287d4b (\"uio: fix a sleep-in-atomic-context bug in\nuio_dmem_genirq_irqcontrol()\") started calling disable_irq() without\nholding the spinlock because it can sleep. However, that fix introduced\nanother bug: if interrupt is already disabled and a new disable request\ncomes in, then the spinlock is not unlocked:\n\nroot@localhost:~# printf \u0027\\x00\\x00\\x00\\x00\u0027 \u003e /dev/uio0\nroot@localhost:~# printf \u0027\\x00\\x00\\x00\\x00\u0027 \u003e /dev/uio0\nroot@localhost:~# [   14.851538] BUG: scheduling while atomic: bash/223/0x00000002\n[   14.851991] Modules linked in: uio_dmem_genirq uio myfpga(OE) bochs drm_vram_helper drm_ttm_helper ttm drm_kms_helper drm snd_pcm ppdev joydev psmouse snd_timer snd e1000fb_sys_fops syscopyarea parport sysfillrect soundcore sysimgblt input_leds pcspkr i2c_piix4 serio_raw floppy evbug qemu_fw_cfg mac_hid pata_acpi ip_tables x_tables autofs4 [last unloaded: parport_pc]\n[   14.854206] CPU: 0 PID: 223 Comm: bash Tainted: G           OE      6.0.0-rc7 #21\n[   14.854786] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014\n[   14.855664] Call Trace:\n[   14.855861]  \u003cTASK\u003e\n[   14.856025]  dump_stack_lvl+0x4d/0x67\n[   14.856325]  dump_stack+0x14/0x1a\n[   14.856583]  __schedule_bug.cold+0x4b/0x5c\n[   14.856915]  __schedule+0xe81/0x13d0\n[   14.857199]  ? idr_find+0x13/0x20\n[   14.857456]  ? get_work_pool+0x2d/0x50\n[   14.857756]  ? __flush_work+0x233/0x280\n[   14.858068]  ? __schedule+0xa95/0x13d0\n[   14.858307]  ? idr_find+0x13/0x20\n[   14.858519]  ? get_work_pool+0x2d/0x50\n[   14.858798]  schedule+0x6c/0x100\n[   14.859009]  schedule_hrtimeout_range_clock+0xff/0x110\n[   14.859335]  ? tty_write_room+0x1f/0x30\n[   14.859598]  ? n_tty_poll+0x1ec/0x220\n[   14.859830]  ? tty_ldisc_deref+0x1a/0x20\n[   14.860090]  schedule_hrtimeout_range+0x17/0x20\n[   14.860373]  do_select+0x596/0x840\n[   14.860627]  ? __kernel_text_address+0x16/0x50\n[   14.860954]  ? poll_freewait+0xb0/0xb0\n[   14.861235]  ? poll_freewait+0xb0/0xb0\n[   14.861517]  ? rpm_resume+0x49d/0x780\n[   14.861798]  ? common_interrupt+0x59/0xa0\n[   14.862127]  ? asm_common_interrupt+0x2b/0x40\n[   14.862511]  ? __uart_start.isra.0+0x61/0x70\n[   14.862902]  ? __check_object_size+0x61/0x280\n[   14.863255]  core_sys_select+0x1c6/0x400\n[   14.863575]  ? vfs_write+0x1c9/0x3d0\n[   14.863853]  ? vfs_write+0x1c9/0x3d0\n[   14.864121]  ? _copy_from_user+0x45/0x70\n[   14.864526]  do_pselect.constprop.0+0xb3/0xf0\n[   14.864893]  ? do_syscall_64+0x6d/0x90\n[   14.865228]  ? do_syscall_64+0x6d/0x90\n[   14.865556]  __x64_sys_pselect6+0x76/0xa0\n[   14.865906]  do_syscall_64+0x60/0x90\n[   14.866214]  ? syscall_exit_to_user_mode+0x2a/0x50\n[   14.866640]  ? do_syscall_64+0x6d/0x90\n[   14.866972]  ? do_syscall_64+0x6d/0x90\n[   14.867286]  ? do_syscall_64+0x6d/0x90\n[   14.867626]  entry_SYSCALL_64_after_hwframe+0x63/0xcd\n[...] stripped\n[   14.872959]  \u003c/TASK\u003e\n\n(\u0027myfpga\u0027 is a simple \u0027uio_dmem_genirq\u0027 driver I wrote to test this)\n\nThe implementation of \"uio_dmem_genirq\" was based on \"uio_pdrv_genirq\" and\nit is used in a similar manner to the \"uio_pdrv_genirq\" driver with respect\nto interrupt configuration and handling. At the time \"uio_dmem_genirq\" was\nintroduced, both had the same implementation of the \u0027uio_info\u0027 handlers\nirqcontrol() and handler(). Then commit 34cb27528398 (\"UIO: Fix concurrency\nissue\"), which was only applied to \"uio_pdrv_genirq\", ended up making them\na little different. That commit, among other things, changed disable_irq()\nto disable_irq_nosync() in the implementation of irqcontrol(). The\nmotivation there was to avoid a deadlock between irqcontrol() and\nhandler(), since it added a spinlock in the irq handler, and disable_irq()\nwaits for the completion of the irq handler.\n\nBy changing disable_irq() to disable_irq_nosync() in irqcontrol(), we also\navoid the sleeping-whil\n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-23T15:24:49.933Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/9977cb7af5a8f4738198b020436e2e56c5cd721e"
        },
        {
          "url": "https://git.kernel.org/stable/c/a323d24a0183be730d2398b11b3a91e5c2e222a0"
        },
        {
          "url": "https://git.kernel.org/stable/c/ac5585bb06a2e82177269bee93e59887ce591106"
        },
        {
          "url": "https://git.kernel.org/stable/c/eca77a25a7cb3201738f4b55b9b8fa1089d7d002"
        },
        {
          "url": "https://git.kernel.org/stable/c/9bf7a0b2b15cd12e15f7858072bd89933746de67"
        },
        {
          "url": "https://git.kernel.org/stable/c/79a4bdb6b9920134af1a4738a1fa36a0438cd905"
        },
        {
          "url": "https://git.kernel.org/stable/c/030b6c7bb1e4edebaee2b1e48fbcc9cd5998d51d"
        },
        {
          "url": "https://git.kernel.org/stable/c/ee180e867ce4b2f744799247b81050b3e5dd62cd"
        },
        {
          "url": "https://git.kernel.org/stable/c/9de255c461d1b3f0242b3ad1450c3323a3e00b34"
        }
      ],
      "title": "uio: uio_dmem_genirq: Fix missing unlock in irq configuration",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50652",
    "datePublished": "2025-12-09T00:00:26.593Z",
    "dateReserved": "2025-12-08T23:57:43.371Z",
    "dateUpdated": "2026-05-23T15:24:49.933Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

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.

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