Description
In the Linux kernel, the following vulnerability has been resolved: scsi: imm: Fix use-after-free bug caused by unfinished delayed work The delayed work item 'imm_tq' is initialized in imm_attach() and scheduled via imm_queuecommand() for processing SCSI commands. When the IMM parallel port SCSI host adapter is detached through imm_detach(), the imm_struct device instance is deallocated. However, the delayed work might still be pending or executing when imm_detach() is called, leading to use-after-free bugs when the work function imm_interrupt() accesses the already freed imm_struct memory. The race condition can occur as follows: CPU 0(detach thread) | CPU 1 | imm_queuecommand() | imm_queuecommand_lck() imm_detach() | schedule_delayed_work() kfree(dev) //FREE | imm_interrupt() | dev = container_of(...) //USE dev-> //USE Add disable_delayed_work_sync() in imm_detach() to guarantee proper cancellation of the delayed work item before imm_struct is deallocated.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < cfd561e8df5f46fc1c9d54885165a60e63831c14affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 9a8e53154353580d53f7f86a253927e41294017eaffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 31ab2aad7a7b7501e904a09bf361e44671f66092affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 48dd41fa2d6c6a0c50e714deeba06ffe7f91961baffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 9e434426cc23ad5e2aad649327b59aea00294b13affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < ab58153ec64fa3fc9aea09ca09dc9322e0b54a7caffected
Linux Linux
Default version status: affected
2.6.12affected0 to < 2.6.12unaffected6.1.191 to ≤ 6.1.*unaffected6.6.160 to ≤ 6.6.*unaffected6.12.63 to ≤ 6.12.*unaffected6.17.13 to ≤ 6.17.*unaffected6.18.2 to ≤ 6.18.*unaffected6.19 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/cfd561e8df5f46fc1c9d54885165a60e63831c14 ↗
- https://git.kernel.org/stable/c/9a8e53154353580d53f7f86a253927e41294017e ↗
- https://git.kernel.org/stable/c/31ab2aad7a7b7501e904a09bf361e44671f66092 ↗
- https://git.kernel.org/stable/c/48dd41fa2d6c6a0c50e714deeba06ffe7f91961b ↗
- https://git.kernel.org/stable/c/9e434426cc23ad5e2aad649327b59aea00294b13 ↗
- https://git.kernel.org/stable/c/ab58153ec64fa3fc9aea09ca09dc9322e0b54a7c ↗