VulnSocial

CVE-2026-31487Patch(linux / linux_kernel)

LOWCVSS 5.5 · MEDIUM

Signal is active with 2 mentions in latest observed window

Immediate actions

  • Patch linux linux_kernel systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

In the Linux kernel, the following vulnerability has been resolved: spi: use generic driver_override infrastructure When a driver is probed through __driver_attach(), the bus' match() callback is called without the device lock held, thus accessing the driver_override field without a lock, which can cause a UAF. Fix this by using the driver-core driver_override infrastructure taking care of proper locking internally. Note that calling match() from __driver_attach() without the device lock held is intentional. [1] Also note that we do not enable the driver_override feature of struct bus_type, as SPI - in contrast to most other buses - passes "" to sysfs_emit() when the driver_override pointer is NULL. Thus, printing "\n" instead of "(null)\n".

linux CVEsBack to dashboard
0.5/ 10 priority

Sources & remediation

Patch / fix
Weakness type (CWE)
CWE-667

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • linux_kernel

Threat summary

  • Patch or workaround signal is available
  • 3 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Patch or workaround mentioned in 2 signals
  • Technical details provided in 2 signals
  • General: 1 classified signal
  • Peaked at 2 mentions on most recent observed day (2026-04-23)
  • 3 total mentions across 2 days

Affected systems

Vendors
linux
Products
linux_kernel

2 versions affected across 1 product

Deep dive

Activity timeline3 mentions / 2d
01122Mentions · 2026-04-22: 1Mentions · 2026-04-23: 2Patch / Workaround · 2026-04-22: 1Patch / Workaround · 2026-04-23: 1Technical Details · 2026-04-23: 204-2204-23
Signal classification2 categories
Patch
266.7%
General
133.3%
Referenced assets3 URLs
Classification over time
DateTotalLabels
2026-04-221
Patch1
2026-04-232
General1Patch1
Full discourse3 posts
  • WindowsForum@windowsforum
    General

    🪟 CVE-2026-31487 is a reminder that “small SPI bug” can mean “use-after-free roulette.” Locking discipline matters—Microsoft should take notes before their drivers join the chaos. https://windowsforum.com/threads/cve-2026-31487-fix-spi-driver-override-race-leads-to-use-after-free.414747/?utm_source=x&utm_medium=social&utm_campaign=news_node84 #LinuxKernelSecurity #UseAfterFree #Cve202631487 #SpiDriverModel https://t.co/de8QX4PQw9

    Post summary

    The tweet points out a use‑after‑free bug in Windows SPI drivers, warning of race‑condition risks, but provides no PoC, exploit, patch, or active‑exploitation evidence.

    0000052
    1.1K followersView on X
  • WindowsForum@windowsforum
    Patch

    🪟 CVE-2026-31487 is the classic “nothing blows up… until it does” UAF bug in the SPI + driver_override dance. Kernel lifetime rules matter, kids. Nice “generic fix,” but let’s tighten the choreography. https://windowsforum.com/threads/cve-2026-31487-spi-driver_override-use-after-free-and-the-safe-generic-fix.414745/?utm_source=x&utm_medium=social&utm_campaign=news_node84 #UseAfterFree #LinuxKernelSecurity #SpiBus #DriverCore

    Post summary

    The post highlights CVE‑2026‑31487, a use‑after‑free vulnerability in the Linux kernel’s SPI/driver_override path, references a generic patch, but contains no PoC or evidence of active exploitation.

    0000040
    1.1K followersView on X
  • CVE@CVEnew
    Patch

    CVE-2026-31487 In the Linux kernel, the following vulnerability has been resolved: spi: use generic driver_override infrastructure When a driver is probed through __driver_attach(… https://www.cve.org/CVERecord?id=CVE-2026-31487

    Post summary

    CVE-2026-31487 in the Linux kernel has been fixed, though technical details and patch specifics are not disclosed in the snippet.

    00000129
    57.2K followersView on X
CPE platform detail9 entries

9 of 9 entries

PartVendorProductVersionTarget SWTarget HW
OSlinuxlinux_kernel---
OSlinuxlinux_kernel4.20--
OSlinuxlinux_kernel7.0--
OSlinuxlinux_kernel7.0--
OSlinuxlinux_kernel7.0--
OSlinuxlinux_kernel7.0--
OSlinuxlinux_kernel7.0--
OSlinuxlinux_kernel7.0--
OSlinuxlinux_kernel7.0--

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