CVE - CVE-2023-52872

CVE-ID
CVE-2023-52872	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/19d34b73234af542cc8a218cf398dee73cdb1890 URL:https://git.kernel.org/stable/c/19d34b73234af542cc8a218cf398dee73cdb1890 MISC:https://git.kernel.org/stable/c/3a75b205de43365f80a33b98ec9289785da56243 URL:https://git.kernel.org/stable/c/3a75b205de43365f80a33b98ec9289785da56243 MISC:https://git.kernel.org/stable/c/81a4dd5e6c78f5d8952fa8c9d36565db1fe01444 URL:https://git.kernel.org/stable/c/81a4dd5e6c78f5d8952fa8c9d36565db1fe01444 MISC:https://git.kernel.org/stable/c/ce4df90333c4fe65acb8b5089fdfe9b955ce976a URL:https://git.kernel.org/stable/c/ce4df90333c4fe65acb8b5089fdfe9b955ce976a MISC:https://git.kernel.org/stable/c/df6cfab66ff2a44bd23ad5dd5309cb3421bb6593 URL:https://git.kernel.org/stable/c/df6cfab66ff2a44bd23ad5dd5309cb3421bb6593
Assigning CNA
kernel.org
Date Record Created
20240521	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240521)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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