{"id":"CVE-2026-63798","state":"PUBLISHED","title":"irqchip/imgpdc: Fix resource leak, add missing chained handler cleanup on remove","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()","publishedAt":"2026-07-19T12:02:05.783Z","updatedAt":"2026-08-17T04:51:03.369Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b6ef9161e43ad58c3824bd76dc87716276f0cd70","status":"affected","lessThan":"8176773dfceae7978b01c20b233693e072053700","versionType":"git"},{"version":"b6ef9161e43ad58c3824bd76dc87716276f0cd70","status":"affected","lessThan":"c2c7733101bb8c0b29ac9ee41073eaf602821a59","versionType":"git"},{"version":"b6ef9161e43ad58c3824bd76dc87716276f0cd70","status":"affected","lessThan":"83d7ec14b0938ad8cae008058fd6f912f4a9a312","versionType":"git"},{"version":"b6ef9161e43ad58c3824bd76dc87716276f0cd70","status":"affected","lessThan":"44567537a2623dcd2b4018a7f043cf8069579e5d","versionType":"git"},{"version":"b6ef9161e43ad58c3824bd76dc87716276f0cd70","status":"affected","lessThan":"41826e5297e67cd96a0a46fde06a5069a8ce436a","versionType":"git"},{"version":"b6ef9161e43ad58c3824bd76dc87716276f0cd70","status":"affected","lessThan":"b3a3831b2eb884641906fc5e46207b205b6aea13","versionType":"git"},{"version":"b6ef9161e43ad58c3824bd76dc87716276f0cd70","status":"affected","lessThan":"0405a65e4ebd9eac13a765f9f02ac05851ca5421","versionType":"git"},{"version":"b6ef9161e43ad58c3824bd76dc87716276f0cd70","status":"affected","lessThan":"37738fdf2ab1e504d1c63ce5bc0aeb6452d8f057","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/irqchip/irq-imgpdc.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.12","versionType":"semver"},{"version":"5.10.260","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.211","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.177","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.144","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.95","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.38","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.3","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/irqchip/irq-imgpdc.c"]}],"references":["https://git.kernel.org/stable/c/8176773dfceae7978b01c20b233693e072053700","https://git.kernel.org/stable/c/c2c7733101bb8c0b29ac9ee41073eaf602821a59","https://git.kernel.org/stable/c/83d7ec14b0938ad8cae008058fd6f912f4a9a312","https://git.kernel.org/stable/c/44567537a2623dcd2b4018a7f043cf8069579e5d","https://git.kernel.org/stable/c/41826e5297e67cd96a0a46fde06a5069a8ce436a","https://git.kernel.org/stable/c/b3a3831b2eb884641906fc5e46207b205b6aea13","https://git.kernel.org/stable/c/0405a65e4ebd9eac13a765f9f02ac05851ca5421","https://git.kernel.org/stable/c/37738fdf2ab1e504d1c63ce5bc0aeb6452d8f057"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/63xxx/CVE-2026-63798.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-63798","state":"PUBLISHED","datePublished":"2026-07-19T12:02:05.783Z","dateUpdated":"2026-08-17T04:51:03.369Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-19T07:54:57.012Z"},"containers":{"cna":{"title":"irqchip/imgpdc: Fix resource leak, add missing chained handler cleanup on remove","descriptions":[{"lang":"en","value":"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()"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b6ef9161e43ad58c3824bd76dc87716276f0cd70","status":"affected","lessThan":"8176773dfceae7978b01c20b233693e072053700","versionType":"git"},{"version":"b6ef9161e43ad58c3824bd76dc87716276f0cd70","status":"affected","lessThan":"c2c7733101bb8c0b29ac9ee41073eaf602821a59","versionType":"git"},{"version":"b6ef9161e43ad58c3824bd76dc87716276f0cd70","status":"affected","lessThan":"83d7ec14b0938ad8cae008058fd6f912f4a9a312","versionType":"git"},{"version":"b6ef9161e43ad58c3824bd76dc87716276f0cd70","status":"affected","lessThan":"44567537a2623dcd2b4018a7f043cf8069579e5d","versionType":"git"},{"version":"b6ef9161e43ad58c3824bd76dc87716276f0cd70","status":"affected","lessThan":"41826e5297e67cd96a0a46fde06a5069a8ce436a","versionType":"git"},{"version":"b6ef9161e43ad58c3824bd76dc87716276f0cd70","status":"affected","lessThan":"b3a3831b2eb884641906fc5e46207b205b6aea13","versionType":"git"},{"version":"b6ef9161e43ad58c3824bd76dc87716276f0cd70","status":"affected","lessThan":"0405a65e4ebd9eac13a765f9f02ac05851ca5421","versionType":"git"},{"version":"b6ef9161e43ad58c3824bd76dc87716276f0cd70","status":"affected","lessThan":"37738fdf2ab1e504d1c63ce5bc0aeb6452d8f057","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/irqchip/irq-imgpdc.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.12","versionType":"semver"},{"version":"5.10.260","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.211","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.177","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.144","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.95","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.38","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.3","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/irqchip/irq-imgpdc.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/8176773dfceae7978b01c20b233693e072053700"},{"url":"https://git.kernel.org/stable/c/c2c7733101bb8c0b29ac9ee41073eaf602821a59"},{"url":"https://git.kernel.org/stable/c/83d7ec14b0938ad8cae008058fd6f912f4a9a312"},{"url":"https://git.kernel.org/stable/c/44567537a2623dcd2b4018a7f043cf8069579e5d"},{"url":"https://git.kernel.org/stable/c/41826e5297e67cd96a0a46fde06a5069a8ce436a"},{"url":"https://git.kernel.org/stable/c/b3a3831b2eb884641906fc5e46207b205b6aea13"},{"url":"https://git.kernel.org/stable/c/0405a65e4ebd9eac13a765f9f02ac05851ca5421"},{"url":"https://git.kernel.org/stable/c/37738fdf2ab1e504d1c63ce5bc0aeb6452d8f057"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T04:51:03.369Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.12","versionEndExcluding":"5.10.260"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.12","versionEndExcluding":"5.15.211"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.12","versionEndExcluding":"6.1.177"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.12","versionEndExcluding":"6.6.144"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.12","versionEndExcluding":"6.12.95"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.12","versionEndExcluding":"6.18.38"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.12","versionEndExcluding":"7.1.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.12","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}