CVE-2023-52872 (GCVE-0-2023-52872)

Vulnerability from cvelistv5 – Published: 2024-05-21 15:32 – Updated: 2025-05-04 12:49
VLAI?
Title
tty: n_gsm: fix race condition in status line change on dead connections
Summary
In the Linux kernel, the following vulnerability has been resolved: tty: n_gsm: fix race condition in status line change on dead connections gsm_cleanup_mux() cleans up the gsm by closing all DLCIs, stopping all timers, removing the virtual tty devices and clearing the data queues. This procedure, however, may cause subsequent changes of the virtual modem status lines of a DLCI. More data is being added the outgoing data queue and the deleted kick timer is restarted to handle this. At this point many resources have already been removed by the cleanup procedure. Thus, a kernel panic occurs. Fix this by proving in gsm_modem_update() that the cleanup procedure has not been started and the mux is still alive. Note that writing to a virtual tty is already protected by checks against the DLCI specific connection state.
Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: dd37f657387853623f20c1b2482afbb9cd8ece33 , < 81a4dd5e6c78f5d8952fa8c9d36565db1fe01444 (git)
Affected: c568f7086c6e771c77aad13d727c70ef70e07243 , < df6cfab66ff2a44bd23ad5dd5309cb3421bb6593 (git)
Affected: c568f7086c6e771c77aad13d727c70ef70e07243 , < 19d34b73234af542cc8a218cf398dee73cdb1890 (git)
Affected: c568f7086c6e771c77aad13d727c70ef70e07243 , < ce4df90333c4fe65acb8b5089fdfe9b955ce976a (git)
Affected: c568f7086c6e771c77aad13d727c70ef70e07243 , < 3a75b205de43365f80a33b98ec9289785da56243 (git)
Affected: d834aba5f30d9a6f98f4ca1eb07e501f1989331c (git)
Affected: 692e847a8e6607909c4a3f98ab16ccee7849bd11 (git)
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    Linux Linux Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 5.15.138 , ≤ 5.15.* (semver)
Unaffected: 6.1.62 , ≤ 6.1.* (semver)
Unaffected: 6.5.11 , ≤ 6.5.* (semver)
Unaffected: 6.6.1 , ≤ 6.6.* (semver)
Unaffected: 6.7 , ≤ * (original_commit_for_fix)
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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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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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