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CVE-2026-63798— irqchip/imgpdc: Fix resource leak, add missing chained handler cleanup on remove

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel 3.12版本存在安全漏洞，该漏洞源于irqchip/imgpdc驱动中资源泄露和链式处理程序清理缺失，可能导致释放后重用和内核崩溃。

AI Predicted 5.5 Difficulty: Hard EPSS 0.13% · P3

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux b6ef9161e43ad58c3824bd76dc87716276f0cd70< 8176773dfceae7978b01c20b233693e072053700 affected
b6ef9161e43ad58c3824bd76dc87716276f0cd70< c2c7733101bb8c0b29ac9ee41073eaf602821a59 affected
b6ef9161e43ad58c3824bd76dc87716276f0cd70< 83d7ec14b0938ad8cae008058fd6f912f4a9a312 affected
b6ef9161e43ad58c3824bd76dc87716276f0cd70< 44567537a2623dcd2b4018a7f043cf8069579e5d affected
b6ef9161e43ad58c3824bd76dc87716276f0cd70< 41826e5297e67cd96a0a46fde06a5069a8ce436a affected
b6ef9161e43ad58c3824bd76dc87716276f0cd70< b3a3831b2eb884641906fc5e46207b205b6aea13 affected
b6ef9161e43ad58c3824bd76dc87716276f0cd70< 0405a65e4ebd9eac13a765f9f02ac05851ca5421 affected
b6ef9161e43ad58c3824bd76dc87716276f0cd70< 37738fdf2ab1e504d1c63ce5bc0aeb6452d8f057 affected
… +10 more rows
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I. Basic Information for CVE-2026-63798

Vulnerability Information
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Vulnerability Title
irqchip/imgpdc: Fix resource leak, add missing chained handler cleanup on remove
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: irqchip/imgpdc: Fix resource leak, add missing chained handler cleanup on remove The driver allocates domain generic chips using irq_alloc_domain_generic_chips() during probe and sets up chained handlers using irq_set_chained_handler_and_data(). However, on driver removal, the generic chips are not freed and the chained handlers are not removed. The generic chips remain on the global gc_list and may later be accessed by generic interrupt chip suspend, resume, or shutdown callbacks after the driver has been removed, potentially resulting in a use-after-free and kernel crash. The chained handlers that were installed in probe for peripheral and syswake interrupts are also left dangling, which can lead to spurious interrupts accessing freed memory. Fix these issues by: - Setting IRQ_DOMAIN_FLAG_DESTROY_GC flag in domain->flags, so the core code automatically removes generic chips when irq_domain_remove() is called - Clearing all chained handlers with NULL in pdc_intc_remove()
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel 3.12版本存在安全漏洞，该漏洞源于irqchip/imgpdc驱动中资源泄露和链式处理程序清理缺失，可能导致释放后重用和内核崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux b6ef9161e43ad58c3824bd76dc87716276f0cd70 ~ 8176773dfceae7978b01c20b233693e072053700 -
Linux Linux 3.12 -

II. Public POCs for CVE-2026-63798

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III. Intelligence Information for CVE-2026-63798

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Patches & Fixes for CVE-2026-63798 (7)

Same Patch Batch · Linux · 2026-07-19 · 429 CVEs total

CVE-2026-63795 10.0 CRITICAL 9p: avoid putting oldfid in p9_client_walk() error path
CVE-2026-64046 9.8 CRITICAL net: tls: prevent chain-after-chain in plain text SG
CVE-2026-63984 9.8 CRITICAL ipv6: rpl: fix hdrlen overflow in ipv6_rpl_srh_decompress()
CVE-2026-63800 9.8 CRITICAL pNFS: Fix use-after-free in pnfs_update_layout()
CVE-2026-63979 9.8 CRITICAL net/handshake: hand off the pinned file reference to accept_doit
CVE-2026-64142 9.8 CRITICAL ksmbd: close durable scavenger races against m_fp_list lookups
CVE-2026-63978 9.8 CRITICAL net/handshake: Drain pending requests at net namespace exit
CVE-2026-64056 9.8 CRITICAL net: ethernet: cortina: Make RX SKB per-port
CVE-2026-63808 9.8 CRITICAL exfat: fix potential use-after-free in exfat_find_dir_entry()
CVE-2026-64055 9.8 CRITICAL net: ethernet: cortina: Carry over frag counter
CVE-2026-63922 9.8 CRITICAL ipv6: exthdrs: refresh nh after handling HAO option
CVE-2026-64033 9.8 CRITICAL RDMA/rtrs: Fix use-after-free in path file creation cleanup
CVE-2026-64113 9.8 CRITICAL ixgbevf: fix use-after-free in VEPA multicast source pruning
CVE-2026-63825 9.8 CRITICAL gcov: use atomic counter updates to fix concurrent access crashes
CVE-2026-64016 9.8 CRITICAL ksmbd: fix durable reconnect error path file lifetime
CVE-2026-64122 9.8 CRITICAL net/mlx5e: Fix use-after-free in mlx5e_tx_reporter_timeout_recover
CVE-2026-64047 9.8 CRITICAL net: tls: fix off-by-one in sg_chain entry count for wrapped sk_msg ring
CVE-2026-64035 9.8 CRITICAL igc: set tx buffer type for SMD frames
CVE-2026-64025 9.8 CRITICAL bpf, skmsg: fix verdict sk_data_ready racing with ktls rx
CVE-2026-64150 9.8 CRITICAL netfilter: nft_inner: release local_lock before re-enabling softirqs

Showing top 20 of 429 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-63798

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