Answer in brief
CVE-2025-40071 records a Unknown severity vulnerability in tty: n_gsm: Don't block input queue by waiting MSC. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=48473802506d2d6151f59e0e764932b33b53cb3b <8fcc22d6b90304d8b7436e101562218ea3faf73b || >=48473802506d2d6151f59e0e764932b33b53cb3b <c36785f9de03df56ff9b8eca30fa681a12b2310d || >=48473802506d2d6151f59e0e764932b33b53cb3b <5416e89b81b00443cb03c88df8da097ae091a141 || >=48473802506d2d6151f59e0e764932b33b53cb3b <c5a2791a7f11939f05f95c01f0aec0c55bbf28d5 || >=48473802506d2d6151f59e0e764932b33b53cb3b <3cf0b3c243e56bc43be560617416c1d9f301f44c || 920e849b7d23ced84c9d11e11e2449e34973cfb8 || e83b4e1540469babeffcfd44a605cf8a61542598 || >=5.15.54 <5.16 || >=5.17.6 <5.18 | 8fcc22d6b90304d8b7436e101562218ea3faf73b, c36785f9de03df56ff9b8eca30fa681a12b2310d, 5416e89b81b00443cb03c88df8da097ae091a141, c5a2791a7f11939f05f95c01f0aec0c55bbf28d5, 3cf0b3c243e56bc43be560617416c1d9f301f44c, 5.16, 5.18 |
| Linux/Linuxgeneric | 5.18 | Not reported |
Published upstream
Oct 28, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 30, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 28, 2026
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.
Quoted source text, attributed separately from HOL analysis.