CVE-2026-63798

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-63798", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.012Z", "datePublished": "2026-07-19T12:02:05.783Z", "dateUpdated": "2026-08-17T04:51:03.369Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T04:51:03.369Z"}, "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": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/irqchip/irq-imgpdc.c"], "versions": 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"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"}], "title": "irqchip/imgpdc: Fix resource leak, add missing chained handler cleanup on remove", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

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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()"}], "id": "CVE-2026-63798", "lastModified": "2026-08-17T05:17:16.123", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2026-07-19T12:16:52.303", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0405a65e4ebd9eac13a765f9f02ac05851ca5421"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/37738fdf2ab1e504d1c63ce5bc0aeb6452d8f057"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/41826e5297e67cd96a0a46fde06a5069a8ce436a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/44567537a2623dcd2b4018a7f043cf8069579e5d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8176773dfceae7978b01c20b233693e072053700"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/83d7ec14b0938ad8cae008058fd6f912f4a9a312"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b3a3831b2eb884641906fc5e46207b205b6aea13"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c2c7733101bb8c0b29ac9ee41073eaf602821a59"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-401"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: irqchip/imgpdc: Fix resource leak, add missing chained handler cleanup on remove", "id": "2502224", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502224"}, "csaw": false, "cwe": "CWE-772", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nirqchip/imgpdc: Fix resource leak, add missing chained handler cleanup on remove\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.\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.\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.\nFix these issues by:\n- Setting IRQ_DOMAIN_FLAG_DESTROY_GC flag in domain->flags, so the\ncore code automatically removes generic chips when irq_domain_remove()\nis called\n- Clearing all chained handlers with NULL in pdc_intc_remove()", "A flaw was found in the Linux kernel's `irqchip/imgpdc` driver. This vulnerability occurs because the driver fails to properly free allocated resources and remove interrupt handlers when the driver is removed. This oversight can lead to a use-after-free condition, where the system attempts to access memory that has already been released, potentially causing a kernel crash. Additionally, unremoved interrupt handlers could result in unexpected system behavior by accessing freed memory."], "name": "CVE-2026-63798", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-07-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-63798\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-63798\nhttps://lore.kernel.org/linux-cve-announce/2026071900-CVE-2026-63798-458a@gregkh/T"]}

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