[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"cve-CVE-2026-89738":3},{"id":4,"cve_id":5,"euvd_id":6,"summary":7,"published":8,"cvss_data":9,"is_remote":19,"cwes":20,"cpes":21,"technologies":22,"references":23,"score":28,"epss_score":29,"epss_percentile":30,"is_kev":19,"cisa_kev_date_added":31,"cisa_kev_due_date":31,"cisa_ssvc":32,"attack_mappings":38,"exploits":45},388450,"CVE-2026-89738","EUVD-2026-76650","In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: at91_udc: drain polled-VBUS timer\u002Fwork before udc is freed\n\nIn polled-VBUS mode (board.vbus_pin && board.vbus_polled), probe arms a\nself-restarting cycle: at91_vbus_timer() schedules vbus_timer_work, and\nat91_vbus_timer_work() calls at91_vbus_update() and re-arms the timer via\nmod_timer(). Both recover the same udc through container_of and dereference\nit on every iteration.\n\nNeither teardown path cancels this cycle. udc is devm-allocated, so it is\nfreed after at91udc_remove() returns, and is likewise freed when probe\nfails and devres runs. A timer callback or work item that is pending or\nrunning at either point dereferences the freed udc.\n\nAdd at91_udc_shutdown_vbus_timer() and call it from at91udc_remove() and\nfrom the usb_add_gadget_udc() failure path in probe; the remaining probe\nerror paths fail before the timer is armed. timer_shutdown_sync() waits\nfor a running callback and clears timer->function, which makes the work\nhandler's mod_timer() a permanent no-op; cancel_work_sync() then drains\nany pending or running work whose re-arm attempt now does nothing. The\ntimer must be shut down first, since cancelling the work alone would let\nthe timer re-queue it. The guard mirrors probe: in IRQ mode the timer and\nwork_struct are never initialized.\n\nThis does not require a fault; a normal driver unbind can interleave with\nan already queued work item.\n\nThis issue was found by an in-house static analysis tool.","2026-09-11T20:20:00Z",{"cvss_v3.1":10},{"scope":11,"version":12,"baseScore":13,"attackVector":14,"baseSeverity":15,"vectorString":16,"integrityImpact":15,"userInteraction":17,"attackComplexity":18,"availabilityImpact":15,"privilegesRequired":18,"confidentialityImpact":15},"UNCHANGED","3.1",7.8,"LOCAL","HIGH","CVSS:3.1\u002FAV:L\u002FAC:L\u002FPR:L\u002FUI:N\u002FS:U\u002FC:H\u002FI:H\u002FA:H","NONE","LOW",false,[],[],[],[24,25,26,27],"https:\u002F\u002Fgit.kernel.org\u002Fstable\u002Fc\u002F51a311eb97e91ce1aed3005cb71ccb2e30f8cce8","https:\u002F\u002Fgit.kernel.org\u002Fstable\u002Fc\u002F557ef547d49ff5e6026a4d39bdd3113bd81d7688","https:\u002F\u002Fgit.kernel.org\u002Fstable\u002Fc\u002Fa2a602cb1e28d76a5398cec3fa21b0110385f501","https:\u002F\u002Fgit.kernel.org\u002Fstable\u002Fc\u002Fc27d13ce4bab80fbdf6523928071b6c24b37606c",0.39,0.00192,0.0873,null,{"timestamp":31,"automatable":33,"tech_impact":34,"exploitation":35,"cisa_decision":36,"cisa_remediation_timeline":37},"no","partial","none",{},"FSU",[39],{"name":40,"source":41,"tactics":42,"technique_id":44},"Exploitation for Privilege Escalation","attack_vector",[43],"privilege-escalation","T1068",[]]