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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

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-2026-80557 libceph: fix OOB read in decode_watchers() via missing bounds check
CVE-2026-80553 s390/vfio_ccw: Cancel existing workqueues
CVE-2026-80552 s390/vfio_ccw: Ensure index for read/write regions are within range
CVE-2026-80549 s390/vfio_ccw: Move cp cleanup out of not operational
CVE-2026-80546 s390/zcrypt: Improve CCA CPRB length and overflow checks
CVE-2026-80547 s390/vfio_ccw: Implement a crw lock
CVE-2026-80545 s390/zcrypt: Improve EP11 CPRB length and overflow checks
CVE-2026-80543 s390/zcrypt: Pad trailing CCA or EP11 message with zeros
CVE-2026-80548 s390/vfio_ccw: Selectively expand io_mutex
CVE-2026-80555 s390/vfio_ccw: Free all memory if cp_init() fails
CVE-2026-80554 s390/vfio_ccw: Limit the number of channel program segments
CVE-2026-80556 mmc: atmel-mci: Fix use-after-free in atmci_remove due to race condition
CVE-2026-80559 Input: sur40 - fix input device registration ordering
CVE-2026-80558 libceph: Avoid using invalid osd indices from primary_temp
CVE-2026-80560 openrisc: signal: do not restore privileged SR bits on sigreturn
CVE-2026-80561 libceph: fix multiple unsafe decodes in decode_locker()
CVE-2026-80562 gpio: ml-ioh: use raw_spinlock_t for the register lock
CVE-2026-80564 gve: fix NULL dereference due to missing ptp adjfine
CVE-2026-80565 crypto: qce - fix error path in devm_qce_register_algs
CVE-2026-80566 Input: hynitron_cstxxx - validate touch count and finger IDs

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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