CVE-2025-40071tty: n_gsm: Don't block input queue by waiting MSC
Updated under an hour ago ()
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In the Linux kernel, the following vulnerability has been resolved: tty: n_gsm: Don't block input queue by waiting MSC Currently gsm_queue() processes incoming frames and when opening a DLC channel it calls gsm_dlci_open() which calls gsm_modem_update(). If basic mode is used it calls gsm_modem_upd_via_msc() and it cannot block the input queue by waiting the response to come into the same input queue. Instead allow sending Modem Status Command without waiting for remote end to respond. Define a new function gsm_modem_send_initial_msc() for this purpose. As MSC is only valid for basic encoding, it does not do anything for advanced or when convergence layer type 2 is used.
- 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
- Deferred
- Record last updated
- May 23, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 48473802506d2d6151f59e0e764932b33b53cb3b before c36785f9de03df56ff9b8eca30fa681a12b2310d; 48473802506d2d6151f59e0e764932b33b53cb3b builds before 5416e89b81b00443cb03c88df8da097ae091a141; from 48473802506d2d6151f59e0e764932b33b53cb3b before c5a2791a7f11939f05f95c01f0aec0c55bbf28d5; 48473802506d2d6151f59e0e764932b33b53cb3b builds before 3cf0b3c243e56bc43be560617416c1d9f301f44c; 920e849b7d23ced84c9d11e11e2449e34973cfb8; e83b4e1540469babeffcfd44a605cf8a61542598; from 5.15.54 before 5.16; from 5.17.6 before 5.18 | CNA record |
References
- https://git.kernel.org/stable/c/c36785f9de03df56ff9b8eca30fa681a12b2310d
- https://git.kernel.org/stable/c/5416e89b81b00443cb03c88df8da097ae091a141
- https://git.kernel.org/stable/c/c5a2791a7f11939f05f95c01f0aec0c55bbf28d5
- https://git.kernel.org/stable/c/3cf0b3c243e56bc43be560617416c1d9f301f44c
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.