{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-50652", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-08T23:57:43.371Z", "datePublished": "2025-12-09T00:00:26.593Z", "dateUpdated": "2026-05-23T15:24:49.933Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-23T15:24:49.933Z" }, "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 '\\x00\\x00\\x00\\x00' > /dev/uio0\nroot@localhost:~# printf '\\x00\\x00\\x00\\x00' > /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] \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] \n\n('myfpga' is a simple 'uio_dmem_genirq' 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 'uio_info' 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---" } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/uio/uio_dmem_genirq.c" ], "versions": [ { "version": "b77fa964ecb1d72a671234f5bea95b41f77c233a", "lessThan": "9977cb7af5a8f4738198b020436e2e56c5cd721e", "status": "affected", "versionType": "git" }, { "version": "0151b03f43f2d295a6949454434074b34a262e06", "lessThan": "a323d24a0183be730d2398b11b3a91e5c2e222a0", "status": "affected", "versionType": "git" }, { "version": "ea6b7b1d58790ffb36bace723f6e62a1c8595c77", "lessThan": "ac5585bb06a2e82177269bee93e59887ce591106", "status": "affected", "versionType": "git" }, { "version": "750a95d63746458e86c6d92dfad48a05c64d0ecd", "lessThan": "eca77a25a7cb3201738f4b55b9b8fa1089d7d002", "status": "affected", "versionType": "git" }, { "version": "b74351287d4bd90636c3f48bc188c2f53824c2d4", "lessThan": "9bf7a0b2b15cd12e15f7858072bd89933746de67", "status": "affected", "versionType": "git" }, { "version": "b74351287d4bd90636c3f48bc188c2f53824c2d4", "lessThan": "79a4bdb6b9920134af1a4738a1fa36a0438cd905", "status": "affected", "versionType": "git" }, { "version": "b74351287d4bd90636c3f48bc188c2f53824c2d4", "lessThan": "030b6c7bb1e4edebaee2b1e48fbcc9cd5998d51d", "status": "affected", "versionType": "git" }, { "version": "b74351287d4bd90636c3f48bc188c2f53824c2d4", "lessThan": "ee180e867ce4b2f744799247b81050b3e5dd62cd", "status": "affected", "versionType": "git" }, { "version": "b74351287d4bd90636c3f48bc188c2f53824c2d4", "lessThan": "9de255c461d1b3f0242b3ad1450c3323a3e00b34", "status": "affected", "versionType": "git" }, { "version": "4a117a1c581623d04bf09aa7455d8e7b66e8bb85", "status": "affected", "versionType": "git" }, { "version": "1d52cd8b52876145b0f6344be95fc750e30d9ecb", "status": "affected", "versionType": "git" }, { "version": "4.9.215", "lessThan": "4.9.337", "status": "affected", "versionType": "semver" }, { "version": "4.14.172", "lessThan": "4.14.303", "status": "affected", "versionType": "semver" }, { "version": "4.19.106", "lessThan": "4.19.270", "status": "affected", "versionType": "semver" }, { "version": "5.4.22", "lessThan": "5.4.229", "status": "affected", "versionType": "semver" }, { "version": "4.4.215", "lessThan": "4.5", "status": "affected", "versionType": "semver" }, { "version": "5.5.6", "lessThan": "5.6", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/uio/uio_dmem_genirq.c" ], "versions": [ { "version": "5.6", "status": "affected" }, { "version": "0", "lessThan": "5.6", "status": "unaffected", "versionType": "semver" }, { "version": "4.9.337", "lessThanOrEqual": "4.9.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.14.303", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.270", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.229", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.163", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.86", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.0.16", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.2", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9.215", "versionEndExcluding": "4.9.337" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14.172", "versionEndExcluding": "4.14.303" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19.106", "versionEndExcluding": "4.19.270" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4.22", "versionEndExcluding": "5.4.229" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "5.10.163" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "5.15.86" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.0.16" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.1.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.2" }, { "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" } ] } ] } ], "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" } } } }