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CVE-2026-97503— genirq/proc: Size interrupt directory names for 10-digit interrupt numbers

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.

在 Linux 内核中，已修复以下漏洞： genirq/proc：为 10 位中断号调整中断目录名的缓冲区大小 /proc/irq/<n>/ 目录名在 缓冲区中构建，并使用 进行格式化。 10 位 IRQ 号（包括末尾的空字符 NUL）实际上需要 11 字节空间，而当前的稀疏中断（sparse-IRQ）配置允许中断号达到该范围。 因此，将临时名称缓冲区的大小调整为适合当前十进制格式，并在创建或移除 proc 条目时改用有界格式化（bounded formatting）方式。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.14% · P3

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 6

VendorProduct Version RangeStatus
Linux Linux 721255b9826bd11c7a38b585905fc2dd0fb94e52< d4b22fbae70037299e96539c330e4a1054b28a91 affected
721255b9826bd11c7a38b585905fc2dd0fb94e52< c2c7983c93f5d86962318be7e7298f1bc3feb1a6 affected
6.5 affected
< 6.5 unaffected
6.18.53≤ 6.18.* unaffected
7.2≤ * unaffected
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I. Basic Information for CVE-2026-97503

Vulnerability Information
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Vulnerability Title
genirq/proc: Size interrupt directory names for 10-digit interrupt numbers
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: genirq/proc: Size interrupt directory names for 10-digit interrupt numbers /proc/irq/<n>/ directory names are built in `char name[10]` buffers with `sprintf(name, "%u", irq)`. Ten-digit IRQ numbers already need 11 bytes including the trailing NUL, and current sparse-IRQ configurations allow interrupt numbers in that range. Size the temporary name buffer for the current decimal form and switch to bounded formatting when creating or removing the proc entry.
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 721255b9826bd11c7a38b585905fc2dd0fb94e52 ~ d4b22fbae70037299e96539c330e4a1054b28a91 -
Linux Linux 6.5 -

II. Public POCs for CVE-2026-97503

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III. Intelligence Information for CVE-2026-97503

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Patches & Fixes for CVE-2026-97503 (2)

Same Patch Batch · Linux · 2026-09-24 · 234 CVEs total

CVE-2026-93207 9.8 CRITICAL SUNRPC: Zero rpc_gss_wire_cred at svcauth_gss_decode_credbody() entry
CVE-2026-97413 9.8 CRITICAL RDMA/rtrs-srv: Fix integer underflow in process_read and process_write
CVE-2026-93228 9.1 CRITICAL svcrdma: Reject Write/Reply chunks with segcount 0
CVE-2026-93799 8.8 HIGH wifi: iwlwifi: mvm: validate sta_id in BA window status notif
CVE-2026-97442 8.8 HIGH wifi: ath11k: fix invalid data access in ath11k_dp_rx_h_undecap_nwifi
CVE-2026-97409 8.8 HIGH nvme-fc: Do not cancel requests in io target before it is initialized
CVE-2026-93806 8.8 HIGH wifi: cfg80211: validate assoc response length before status and IE access
CVE-2026-93793 8.8 HIGH wifi: iwlwifi: mvm: validate TX_CMD response layout
CVE-2026-93790 8.8 HIGH wifi: iwlwifi: mvm: fix out-of-bounds tid_data access in BA notif
CVE-2026-93284 8.8 HIGH drm/pagemap: dma-unmap pages before handling migration errors
CVE-2026-93280 8.8 HIGH greybus: audio: bound the topology section sizes against the fetched size
CVE-2026-97509 8.8 HIGH thunderbolt: Keep XDomain reference during the lifetime of a service
CVE-2026-93827 8.4 HIGH virtio-fs: avoid double-free on failed queue setup
CVE-2026-97450 8.4 HIGH ACPICA: validate handler object type in two places
CVE-2026-97451 8.4 HIGH ACPICA: Fix integer overflow in acpi_ex_opcode_3A_1T_1R() (mid_op)
CVE-2026-97452 8.4 HIGH ACPICA: Prevent adding invalid references
CVE-2026-97455 8.4 HIGH ACPICA: Fix use-after-free in acpi_ds_terminate_control_method()
CVE-2026-97433 8.2 HIGH nvme: validate FDP configuration descriptor sizes
CVE-2026-93786 8.1 HIGH ksmbd: preserve VFS inherited POSIX ACL mask
CVE-2026-93221 8.1 HIGH nfsd: convert nfsd_net boolean flags to unsigned long flags word

Showing top 20 of 234 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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