Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected d01ffb9eee4af165d83b08dd73ebdf9fe94a519b before ae467750a3765dd1092eb29f58247950a2f9b60c; affected d01ffb9eee4af165d83b08dd73ebdf9fe94a519b before 38eb01edfdaa1562fa00429be2e33f45383b1b3a; affected d01ffb9eee4af165d83b08dd73ebdf9fe94a519b before 81d8240b0a243b3ddd8fa8aa172f1acc2f7cc8f3; affected d01ffb9eee4af165d83b08dd73ebdf9fe94a519b before 1ea02699c7557eeb35ccff2bd822de1b3e09d868; affected d01ffb9eee4af165d83b08dd73ebdf9fe94a519b before b505e0319852b08a3a716b64620168eab21f4ced; affected ef0a2a0565727a48f2e36a2c461f8b1e3a61922d; affected e2b558fe507a1ed4c43db2b0057fc6e41f20a14c; affected 418993bbaafb0cd48f904ba68eeda052d624c821; affected 5ea00fc60676c0eebfa8560ec461209d638bca9d; affected 9af0fd5c4453a44c692be0cbb3724859b75d739b; affected 4.14.277 before 4.15; affected 4.19.240 before 4.20; affected 5.4.190 before 5.5; affected 5.10.112 before 5.11; affected 5.15.35 before 5.16 |
| Linux / Linux | affected 5.17; unaffected 0 before 5.17; unaffected 6.1.93 through 6.1.*; unaffected 6.6.33 through 6.6.*; unaffected 6.8.12 through 6.8.*; unaffected 6.9.3 through 6.9.*; unaffected 6.10 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/ae467750a3765dd1092eb29f58247950a2f9b60c
- https://git.kernel.org/stable/c/38eb01edfdaa1562fa00429be2e33f45383b1b3a
- https://git.kernel.org/stable/c/81d8240b0a243b3ddd8fa8aa172f1acc2f7cc8f3
- https://git.kernel.org/stable/c/1ea02699c7557eeb35ccff2bd822de1b3e09d868
- https://git.kernel.org/stable/c/b505e0319852b08a3a716b64620168eab21f4ced
ADP enrichment
No English description supplied.
- https://git.kernel.org/stable/c/ae467750a3765dd1092eb29f58247950a2f9b60c
- https://git.kernel.org/stable/c/38eb01edfdaa1562fa00429be2e33f45383b1b3a
- https://git.kernel.org/stable/c/81d8240b0a243b3ddd8fa8aa172f1acc2f7cc8f3
- https://git.kernel.org/stable/c/1ea02699c7557eeb35ccff2bd822de1b3e09d868
- https://git.kernel.org/stable/c/b505e0319852b08a3a716b64620168eab21f4ced
No English description supplied.
No references supplied.