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CVE-2026-80563— gpio: sloppy-logic-analyzer: fix use-after-free via debugfs trigger on unbind

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，以下漏洞已得到修复： gpio: sloppy-logic-analyzer：修复解绑时通过 debugfs 触发的 use-after-free（释放后使用）问题 “trigger” debugfs 文件使用了一个手写的 处理函数（ ），该函数会解引用每个设备的 。该文件通过 创建，而处理函数从未获取 debugfs 引用。因此，在处理函数执行期间，没有任何机制保证对象保持存活。 是通过 分配的。当平台设备解绑时，devres 会释放该对象。由于 未安装 封装， 中的 不会等待正在进行的

AI Predicted 7.8 Difficulty: Moderate EPSS 0.21% · P10

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux 7828b7bbbf2074dd7dd14d87f50bc5ce9036d692< 49a1ebb1ef2c8ada300c174b65273810abb4e326 affected
7828b7bbbf2074dd7dd14d87f50bc5ce9036d692< 23e9f32c0c7d2043e39655cff5ee3ddf29a43f80 affected
7828b7bbbf2074dd7dd14d87f50bc5ce9036d692< 24bef4918f6ab806260476e2f93d8f791fd17449 affected
7828b7bbbf2074dd7dd14d87f50bc5ce9036d692< 44f3468a0aef1aabdad551898ab7cfa2a9d20e99 affected
6.11 affected
< 6.11 unaffected
6.12.105≤ 6.12.* unaffected
6.18.46≤ 6.18.* unaffected
… +2 more rows
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I. Basic Information for CVE-2026-80563

Vulnerability Information
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Vulnerability Title
gpio: sloppy-logic-analyzer: fix use-after-free via debugfs trigger on unbind
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: gpio: sloppy-logic-analyzer: fix use-after-free via debugfs trigger on unbind The "trigger" debugfs file has a hand-rolled ->write handler (trigger_write()) that dereferences the per-device gpio_la_poll_priv. The file is created with debugfs_create_file_unsafe(), and the handler never takes a debugfs reference. Nothing keeps the object alive while the handler runs. priv is allocated with devm_kzalloc(). devres frees it when the platform device is unbound. debugfs_create_file_unsafe() installs no full_proxy wrapper, so debugfs_remove_recursive() in gpio_la_poll_remove() does not wait for an in-flight trigger_write(). The blob_lock taken there does not help, because trigger_write() never takes it. A write that races an unbind therefore writes into freed memory: trigger_write() gpio_la_poll_remove() priv = m->private buf = memdup_user() [may sleep] mutex_lock(&priv->blob_lock) debugfs_remove_recursive() [no wait] mutex_unlock(&priv->blob_lock) (remove returns; devres frees priv) priv->trig_data = buf <-- use-after-free write priv->trig_len = count The race is reachable by root via /sys/bus/platform/drivers/gpio-sloppy-logic-analyzer/unbind. Create "trigger" with debugfs_create_file() instead. Its full_proxy wrapper makes debugfs_remove_recursive() drain any in-flight ->write before it returns. The use-after-free is confirmed under KASAN with a minimal reproducer of the same debugfs_create_file_unsafe() plus devm_kzalloc() pattern (available on request); it produces a slab-use-after-free write in the handler.
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 7828b7bbbf2074dd7dd14d87f50bc5ce9036d692 ~ 49a1ebb1ef2c8ada300c174b65273810abb4e326 -
Linux Linux 6.11 -

II. Public POCs for CVE-2026-80563

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III. Intelligence Information for CVE-2026-80563

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Patches & Fixes for CVE-2026-80563 (4)

Same Patch Batch · Linux · 2026-08-26 · 92 CVEs total

CVE-2026-80519 9.8 CRITICAL ovpn: finish crypto callback cleanup before peer release
CVE-2026-74743 9.8 CRITICAL macvlan: inherit needed_headroom and needed_tailroom from lowerdev
CVE-2026-74737 9.8 CRITICAL net: ethernet: ti: am65-cpsw-nuss: Fix port_id extraction from SRC TAG
CVE-2026-80586 9.8 CRITICAL mptcp: options: reset DSS fields in case of unexpected size
CVE-2026-80587 9.8 CRITICAL mptcp: avoid combining some incoming suboptions
CVE-2026-74744 9.8 CRITICAL ipvlan: inherit needed_headroom and needed_tailroom from phy_dev
CVE-2026-74746 9.8 CRITICAL netfilter: flowtable: publish GC-visible tuple last
CVE-2026-80557 9.8 CRITICAL libceph: fix OOB read in decode_watchers() via missing bounds check
CVE-2026-80558 9.8 CRITICAL libceph: Avoid using invalid osd indices from primary_temp
CVE-2026-80561 9.8 CRITICAL libceph: fix multiple unsafe decodes in decode_locker()
CVE-2026-80528 9.8 CRITICAL ceph: avoid fs reclaim while using current->journal_info
CVE-2026-74752 9.8 CRITICAL sctp: validate cookie AUTH state before use
CVE-2026-80589 9.8 CRITICAL block: stop the timeout timer when releasing a never added disk
CVE-2026-74751 9.4 CRITICAL riscv: lib: Fix ZBB strnlen reading past count boundary
CVE-2026-80585 9.4 CRITICAL mptcp: fastopen: only mark MPTFO subflows with SYN data
CVE-2026-80551 9.3 CRITICAL s390/vfio_ccw: Ensure first IDAW remains constant
CVE-2026-80554 9.3 CRITICAL s390/vfio_ccw: Limit the number of channel program segments
CVE-2026-80553 8.8 HIGH s390/vfio_ccw: Cancel existing workqueues
CVE-2026-80552 8.8 HIGH s390/vfio_ccw: Ensure index for read/write regions are within range
CVE-2026-80576 8.8 HIGH drm/amdgpu: reject oversized IBs with per-ring packet limits

Showing top 20 of 92 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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