{"id":"CVE-2026-22986","summary":"gpiolib: fix race condition for gdev-\u003esrcu","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ngpiolib: fix race condition for gdev-\u003esrcu\n\nIf two drivers were calling gpiochip_add_data_with_key(), one may be\ntraversing the srcu-protected list in gpio_name_to_desc(), meanwhile\nother has just added its gdev in gpiodev_add_to_list_unlocked().\nThis creates a non-mutexed and non-protected timeframe, when one\ninstance is dereferencing and using &gdev-\u003esrcu, before the other\nhas initialized it, resulting in crash:\n\n[    4.935481] Unable to handle kernel paging request at virtual address ffff800272bcc000\n[    4.943396] Mem abort info:\n[    4.943400]   ESR = 0x0000000096000005\n[    4.943403]   EC = 0x25: DABT (current EL), IL = 32 bits\n[    4.943407]   SET = 0, FnV = 0\n[    4.943410]   EA = 0, S1PTW = 0\n[    4.943413]   FSC = 0x05: level 1 translation fault\n[    4.943416] Data abort info:\n[    4.943418]   ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000\n[    4.946220]   CM = 0, WnR = 0, TnD = 0, TagAccess = 0\n[    4.955261]   GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0\n[    4.955268] swapper pgtable: 4k pages, 48-bit VAs, pgdp=0000000038e6c000\n[    4.961449] [ffff800272bcc000] pgd=0000000000000000\n[    4.969203] , p4d=1000000039739003\n[    4.979730] , pud=0000000000000000\n[    4.980210] phandle (CPU): 0x0000005e, phandle (BE): 0x5e000000 for node \"reset\"\n[    4.991736] Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP\n...\n[    5.121359] pc : __srcu_read_lock+0x44/0x98\n[    5.131091] lr : gpio_name_to_desc+0x60/0x1a0\n[    5.153671] sp : ffff8000833bb430\n[    5.298440]\n[    5.298443] Call trace:\n[    5.298445]  __srcu_read_lock+0x44/0x98\n[    5.309484]  gpio_name_to_desc+0x60/0x1a0\n[    5.320692]  gpiochip_add_data_with_key+0x488/0xf00\n    5.946419] ---[ end trace 0000000000000000 ]---\n\nMove initialization code for gdev fields before it is added to\ngpio_devices, with adjacent initialization code.\nAdjust goto statements  to reflect modified order of operations\n\n[Bartosz: fixed a build issue, removed stray newline]","modified":"2026-04-02T13:11:38.849464Z","published":"2026-01-23T15:24:07.932Z","related":["CGA-6v2c-frfg-9g2j","SUSE-SU-2026:20555-1","SUSE-SU-2026:20599-1","SUSE-SU-2026:20615-1","openSUSE-SU-2026:20287-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/22xxx/CVE-2026-22986.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/a7ac22d53d0990152b108c3f4fe30df45fcb0181"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fb674c8f1a5d8dd3113a7326030f963fa2d79c02"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/22xxx/CVE-2026-22986.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-22986"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"47d8b4c1d868148c8fb51b785a89e58ca2d02c4d"},{"fixed":"fb674c8f1a5d8dd3113a7326030f963fa2d79c02"},{"fixed":"a7ac22d53d0990152b108c3f4fe30df45fcb0181"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-22986.json"}}],"schema_version":"1.7.5"}