{"cve":"CVE-2026-63798","nvd":{"published":"2026-07-19T12:16:52.303","modified":"2026-08-17T05:17:16.123","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nirqchip/imgpdc: Fix resource leak, add missing chained handler cleanup on remove\n\nThe driver allocates domain generic chips using\nirq_alloc_domain_generic_chips() during probe and sets up chained\nhandlers using irq_set_chained_handler_and_data(). However, on driver\nremoval, the generic chips are not freed and the chained handlers are\nnot removed.\n\nThe generic chips remain on the global gc_list and may later be accessed by\ngeneric interrupt chip suspend, resume, or shutdown callbacks after the\ndriver has been removed, potentially resulting in a use-after-free and\nkernel crash.\n\nThe chained handlers that were installed in probe for peripheral and\nsyswake interrupts are also left dangling, which can lead to spurious\ninterrupts accessing freed memory.\n\nFix these issues by:\n\n  - Setting IRQ_DOMAIN_FLAG_DESTROY_GC flag in domain->flags, so the\n    core code automatically removes generic chips when irq_domain_remove()\n    is called\n\n  - Clearing all chained handlers with NULL in pdc_intc_remove()","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-401"],"references":["https://git.kernel.org/stable/c/0405a65e4ebd9eac13a765f9f02ac05851ca5421","https://git.kernel.org/stable/c/37738fdf2ab1e504d1c63ce5bc0aeb6452d8f057","https://git.kernel.org/stable/c/41826e5297e67cd96a0a46fde06a5069a8ce436a","https://git.kernel.org/stable/c/44567537a2623dcd2b4018a7f043cf8069579e5d","https://git.kernel.org/stable/c/8176773dfceae7978b01c20b233693e072053700"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:45:36.895656543+00:00"},"epss":{"cve":"CVE-2026-63798","score":0.00126,"percentile":0.0229,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}