CVE - CVE-2024-38602

CVE-ID
CVE-2024-38602	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: ax25: Fix reference count leak issues of ax25_dev The ax25_addr_ax25dev() and ax25_dev_device_down() exist a reference count leak issue of the object "ax25_dev". Memory leak issue in ax25_addr_ax25dev(): The reference count of the object "ax25_dev" can be increased multiple times in ax25_addr_ax25dev(). This will cause a memory leak. Memory leak issues in ax25_dev_device_down(): The reference count of ax25_dev is set to 1 in ax25_dev_device_up() and then increase the reference count when ax25_dev is added to ax25_dev_list. As a result, the reference count of ax25_dev is 2. But when the device is shutting down. The ax25_dev_device_down() drops the reference count once or twice depending on if we goto unlock_put or not, which will cause memory leak. As for the issue of ax25_addr_ax25dev(), it is impossible for one pointer to be on a list twice. So add a break in ax25_addr_ax25dev(). As for the issue of ax25_dev_device_down(), increase the reference count of ax25_dev once in ax25_dev_device_up() and decrease the reference count of ax25_dev after it is removed from the ax25_dev_list.
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/1ea02699c7557eeb35ccff2bd822de1b3e09d868 URL:https://git.kernel.org/stable/c/1ea02699c7557eeb35ccff2bd822de1b3e09d868 MISC:https://git.kernel.org/stable/c/38eb01edfdaa1562fa00429be2e33f45383b1b3a URL:https://git.kernel.org/stable/c/38eb01edfdaa1562fa00429be2e33f45383b1b3a MISC:https://git.kernel.org/stable/c/81d8240b0a243b3ddd8fa8aa172f1acc2f7cc8f3 URL:https://git.kernel.org/stable/c/81d8240b0a243b3ddd8fa8aa172f1acc2f7cc8f3 MISC:https://git.kernel.org/stable/c/ae467750a3765dd1092eb29f58247950a2f9b60c URL:https://git.kernel.org/stable/c/ae467750a3765dd1092eb29f58247950a2f9b60c MISC:https://git.kernel.org/stable/c/b505e0319852b08a3a716b64620168eab21f4ced URL:https://git.kernel.org/stable/c/b505e0319852b08a3a716b64620168eab21f4ced
Assigning CNA
kernel.org
Date Record Created
20240618	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 (20240618)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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