CVE-2026-53332 is a vulnerability in Linux Kernel
Published on July 1, 2026
slimbus: qcom-ngd-ctrl: Register callbacks after creating the ngd
In the Linux kernel, the following vulnerability has been resolved:
slimbus: qcom-ngd-ctrl: Register callbacks after creating the ngd
When the remoteproc starts in parallel with the NGD driver being probed,
or the remoteproc is already up when the PDR lookup is being registered,
or in the theoretical event that we get an interrupt from the hardware,
these callbacks will operate on uninitialized data. This result in
issues to boot the affected boards.
One such example can be seen in the following fault, where
qcom_slim_ngd_ssr_pdr_notify() schedules work on the NULL ngd_up_work.
[ 21.858578] ------------[ cut here ]------------
[ 21.858745] WARNING: kernel/workqueue.c:2338 at __queue_work+0x5e0/0x790, CPU#2: kworker/2:2/116
...
[ 21.859251] Call trace:
[ 21.859255] __queue_work+0x5e0/0x790 (P)
[ 21.859265] queue_work_on+0x6c/0xf0
[ 21.859273] qcom_slim_ngd_ssr_pdr_notify+0x110/0x150 [slim_qcom_ngd_ctrl]
[ 21.859304] qcom_slim_ngd_ssr_notify+0x24/0x40 [slim_qcom_ngd_ctrl]
[ 21.859318] notifier_call_chain+0xa4/0x230
[ 21.859329] srcu_notifier_call_chain+0x64/0xb8
[ 21.859338] ssr_notify_start+0x40/0x78 [qcom_common]
[ 21.859355] rproc_start+0x130/0x230
[ 21.859367] rproc_boot+0x3d4/0x518
...
Move the enablement of interrupts, and the registration of SSR and PDR
until after the NGD device has been registered.
This could be further refined by moving initialization to the control
driver probe and by removing the platform driver model from the picture.
Products Associated with CVE-2026-53332
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Affected Versions
Linux:- Version 917809e2280bb83994be8b642373fd941d40c407 and below fa3790c7ea98328ddc3f7d8bf40247556245a6fc is affected.
- Version 917809e2280bb83994be8b642373fd941d40c407 and below 24ec89123fc9d0d24ce719dcf7fd6c57e5b0d753 is affected.
- Version 917809e2280bb83994be8b642373fd941d40c407 and below 08564e15c47a5fb0af6643a43ee15521d49bcdea is affected.
- Version 917809e2280bb83994be8b642373fd941d40c407 and below 2a9d50e9ea406e0c8735938484adc20515ef1b47 is affected.
- Version 4.19 is affected.
- Before 4.19 is unaffected.
- Version 6.12.94, <= 6.12.* is unaffected.
- Version 6.18.36, <= 6.18.* is unaffected.
- Version 7.0.13, <= 7.0.* is unaffected.
- Version 7.1, <= * is unaffected.