CVE-2026-74441usb: typec: ucsi: Fix race condition and ordering in port unregistration
Updated under an hour ago ()
Does this affect you?
It affects Linux. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
In the Linux kernel, the following vulnerability has been resolved: usb: typec: ucsi: Fix race condition and ordering in port unregistration A synchronization issue exists during port unregistration where pending partner work items can race against workqueue destruction, leading to use-after-free conditions: cros_ec_ucsi cros_ec_ucsi.3.auto: error -ETIMEDOUT: PPM init failed BUG: kernel NULL pointer dereference, address: 0000000000000000 RIP: 0010:__queue_work+0x83/0x4a0 Call Trace: <IRQ> __cfi_delayed_work_timer_fn+0x10/0x10 run_timer_softirq+0x3b6/0xbd0 sched_clock_cpu+0xc/0x110 irq_exit_rcu+0x18d/0x330 fred_sysvec_apic_timer_interrupt+0x5e/0x80 Fix this by ensuring strict ordering and proper serialization during teardown: 1. Move ucsi_unregister_partner() to the beginning of the teardown sequence and protect it under the connector mutex lock. 2. Ensure all pending partner tasks are explicitly flushed and finished before the workqueue is destroyed. 3. Switch from mod_delayed_work() to a cancel_delayed_work() and queue_delayed_work() sequence. This guarantees that items currently marked as pending won't be scheduled an additional time, preventing a double release of resources which leads to the following crash: Oops: general protection fault, probably for non-canonical address 0xdead000000000122: 0000 [#1] SMP NOPTI Workqueue: cros_ec_ucsi.3.auto-con2 ucsi_poll_worker RIP: 0010:ucsi_poll_worker+0x65/0x1e0 Call Trace: <TASK> process_scheduled_works+0x218/0x6d0 worker_thread+0x188/0x3f0 __cfi_worker_thread+0x10/0x10 kthread+0x226/0x2a0 To ensure these rules are applied identically across both the normal teardown and the ucsi_init() error paths, consolidate the cleanup logic into a new helper, ucsi_unregister_port().
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Aug 23, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from b9aa02ca39a49740926c2c450a1505a4a0f8954a before 7b63c680ff605f60f056e5f2c323f1a602aee182; from b9aa02ca39a49740926c2c450a1505a4a0f8954a before 07f8aaffee705e552c1f723ac8bf7eb137ad59c2; from b9aa02ca39a49740926c2c450a1505a4a0f8954a before 11483d80267db97fbe49f2df66385434256cc3b0; from b9aa02ca39a49740926c2c450a1505a4a0f8954a before 3f7b3728dd9011c915cbeaea77274ebe8366550d; from b9aa02ca39a49740926c2c450a1505a4a0f8954a before bc7a0f721123ea260a42f1ded06dab844ba49434; from b9aa02ca39a49740926c2c450a1505a4a0f8954a before 7aa7d4bf9d3fa9a6a47b640ad103ab433b7ff261 | CNA record |
References
- https://git.kernel.org/stable/c/7b63c680ff605f60f056e5f2c323f1a602aee182
- https://git.kernel.org/stable/c/07f8aaffee705e552c1f723ac8bf7eb137ad59c2
- https://git.kernel.org/stable/c/11483d80267db97fbe49f2df66385434256cc3b0
- https://git.kernel.org/stable/c/3f7b3728dd9011c915cbeaea77274ebe8366550d
- https://git.kernel.org/stable/c/bc7a0f721123ea260a42f1ded06dab844ba49434
- https://git.kernel.org/stable/c/7aa7d4bf9d3fa9a6a47b640ad103ab433b7ff261
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.