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CVE-2026-98938— rust: irq: pass RegistrationInner as cookie to request_irq

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，以下漏洞已被修复： rust: irq: 将 RegistrationInner 作为 cookie 传递给 request_irq 在提交 ba268514ea14（"rust: devres: 修复因嵌套导致的竞态条件”）之后， 改为以值的形式返回 ，而不再通过 进行原地初始化。由于 是在 内部调用的，此时 尚未完成初始化。因此，当中断被启用后，若在中断回调函数中访问 ，可能会读取到未初始化的内存，从而引发潜在的安全问题。 修复方法是：将 和中断处理函数的指针存储在 中，并在其所有字段初

AI Predicted 8.8 Difficulty: Hard

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 4

VendorProduct Version RangeStatus
Linux Linux 29e16fcd67ee5b1d0417a657294cf96fdf2f8df9< 9a7931e847f338a687e96cde9f37e0cff83ddd84 affected
6.18 affected
< 6.18 unaffected
7.2.10≤ 7.2.* unaffected
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I. Basic Information for CVE-2026-98938

Vulnerability Information
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Vulnerability Title
rust: irq: pass RegistrationInner as cookie to request_irq
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: rust: irq: pass RegistrationInner as cookie to request_irq With commit ba268514ea14 ("rust: devres: fix race condition due to nesting"), Devres::new() returns Result<Self> by value instead of initializing in-place via PinInit. Because request_irq() is called inside Devres::new(), registration.inner is still uninitialized when the IRQ is enabled, so accessing registration.inner.device() in the IRQ callback can read uninitialized memory. Fix this by storing the Device and handler pointer in RegistrationInner and passing RegistrationInner as the IRQ cookie after its fields are initialized. This is not needed in mainline because commit 98c63ce4d760 ("rust: irq: make Registration compatible with lifetime-bound drivers") removed Devres from irq::Registration and moved request_irq() after all fields are initialized.
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 29e16fcd67ee5b1d0417a657294cf96fdf2f8df9 ~ 9a7931e847f338a687e96cde9f37e0cff83ddd84 -
Linux Linux 6.18 -

II. Public POCs for CVE-2026-98938

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III. Intelligence Information for CVE-2026-98938

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Patches & Fixes for CVE-2026-98938 (1)

Same Patch Batch · Linux · 2026-10-23 · 218 CVEs total

CVE-2026-98937 perf/core: Check kernel access when kernel callchains are requested
CVE-2026-98951 riscv: ptrace: Zero-initialize regset buffers before copyin
CVE-2026-98950 flow_dissector: avoid u16 truncation of hlen in bpf_flow_dissect()
CVE-2026-98949 drm/imagination: Fix reference and vm_bo handling in remap()
CVE-2026-98948 mlxsw: spectrum_flower: Fix port range register leak in tmplt_create()
CVE-2026-98947 vsock: Fix memory leak in vmci_transport_recv_dgram_cb()
CVE-2026-98946 drm/vc4: Disable the V3D interrupt across runtime suspend
CVE-2026-98945 HID: steam: Rearrange teardown sequence
CVE-2026-98944 HID: steam: Refactor registration
CVE-2026-98943 HID: steam: Clean up locking
CVE-2026-98942 sched_ext: Build the cid tables privately and publish them with RCU
CVE-2026-98941 ext4: don't enable large folios on encrypted inodes
CVE-2026-98940 ASoC: qcom: lpass-cpu: use DAI table index for playback constraints
CVE-2026-98939 x86/mm: Drop unnecessary PMD page copy when freeing
CVE-2026-98926 drm/amd/display: Remove sink usage from DPMS
CVE-2026-98929 macsec: initialize SecY before registering the netdevice
CVE-2026-98928 KVM: arm64: Derive GUEST_HAS_SVE from the SVE feature bit at EL2
CVE-2026-98927 KVM: arm64: nv: Fix life cycle of the nested_mmus array
CVE-2026-98930 KVM: s390: Fix IRQ injection with SIGP Stop and Store Status
CVE-2026-98925 bpf, sockmap: Fix self-redirect copied_seq double-counting

Showing top 20 of 218 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-98938

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