CVE-2025-38448 (GCVE-0-2025-38448)

Vulnerability from cvelistv5 – Published: 2025-07-25 15:27 – Updated: 2026-05-11 21:28
VLAI?
Title
usb: gadget: u_serial: Fix race condition in TTY wakeup
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: u_serial: Fix race condition in TTY wakeup A race condition occurs when gs_start_io() calls either gs_start_rx() or gs_start_tx(), as those functions briefly drop the port_lock for usb_ep_queue(). This allows gs_close() and gserial_disconnect() to clear port.tty and port_usb, respectively. Use the null-safe TTY Port helper function to wake up TTY. Example CPU1: CPU2: gserial_connect() // lock gs_close() // await lock gs_start_rx() // unlock usb_ep_queue() gs_close() // lock, reset port.tty and unlock gs_start_rx() // lock tty_wakeup() // NPE
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 35f95fd7f234d2b58803bab6f6ebd6bb988050a2 , < 18d58a467ccf011078352d91b4d6a0108c7318e8 (git)
Affected: 35f95fd7f234d2b58803bab6f6ebd6bb988050a2 , < d43657b59f36e88289a6066f15bc9a80df5014eb (git)
Affected: 35f95fd7f234d2b58803bab6f6ebd6bb988050a2 , < a5012673d49788f16bb4e375b002d7743eb642d9 (git)
Affected: 35f95fd7f234d2b58803bab6f6ebd6bb988050a2 , < ee8d688e2ba558f3bb8ac225113740be5f335417 (git)
Affected: 35f95fd7f234d2b58803bab6f6ebd6bb988050a2 , < c6eb4a05af3d0ba3bc4e8159287722fb9abc6359 (git)
Affected: 35f95fd7f234d2b58803bab6f6ebd6bb988050a2 , < abf3620cba68e0e51e5c21054ce4f925f75b3661 (git)
Affected: 35f95fd7f234d2b58803bab6f6ebd6bb988050a2 , < c8c80a3a35c2e3488409de2d5376ef7e662a2bf5 (git)
Affected: 35f95fd7f234d2b58803bab6f6ebd6bb988050a2 , < c529c3730bd09115684644e26bf01ecbd7e2c2c9 (git)
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Linux Linux Affected: 3.5
Unaffected: 0 , < 3.5 (semver)
Unaffected: 5.4.296 , ≤ 5.4.* (semver)
Unaffected: 5.10.240 , ≤ 5.10.* (semver)
Unaffected: 5.15.189 , ≤ 5.15.* (semver)
Unaffected: 6.1.146 , ≤ 6.1.* (semver)
Unaffected: 6.6.99 , ≤ 6.6.* (semver)
Unaffected: 6.12.39 , ≤ 6.12.* (semver)
Unaffected: 6.15.7 , ≤ 6.15.* (semver)
Unaffected: 6.16 , ≤ * (original_commit_for_fix)
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}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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