cbcvebase.
CVE-2025-40061
published 2025-10-28

CVE-2025-40061: In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Fix race in do_task() when draining When do_task() exhausts its iteration budget…

PriorityP338high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.14%
3.8th percentile
In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Fix race in do_task() when draining When do_task() exhausts its iteration budget (!ret), it sets the state to TASK_STATE_IDLE to reschedule, without a secondary check on the current task->state. This can overwrite the TASK_STATE_DRAINING state set by a concurrent call to rxe_cleanup_task() or rxe_disable_task(). While state changes are protected by a spinlock, both rxe_cleanup_task() and rxe_disable_task() release the lock while waiting for the task to finish draining in the while(!is_done(task)) loop. The race occurs if do_task() hits its iteration limit and acquires the lock in this window. The cleanup logic may then proceed while the task incorrectly reschedules itself, leading to a potential use-after-free. This bug was introduced during the migration from tasklets to workqueues, where the special handling for the draining case was lost. Fix this by restoring the original pre-migration behavior. If the state is TASK_STATE_DRAINING when iterations are exhausted, set cont to 1 to force a new loop iteration. This allows the task to finish its work, so that a subsequent iteration can reach the switch statement and correctly transition the state to TASK_STATE_DRAINED, stopping the task as intended.

Affected

17 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.17.6-1 (forky)linux 6.17.6-1 (forky)
linuxlinux
linuxlinux>= 9b4b7c1f9f54120940e243251e2b1407767b3381 < 85288bcf7ffe11e7b036edf91937bc62fd38407685288bcf7ffe11e7b036edf91937bc62fd384076
linuxlinux>= 9b4b7c1f9f54120940e243251e2b1407767b3381 < 52edccfb555142678c836c285bf5b4ec760bd04352edccfb555142678c836c285bf5b4ec760bd043
linuxlinux>= 9b4b7c1f9f54120940e243251e2b1407767b3381 < 660b6959c4170637f5db2279d1f71af33a49e49b660b6959c4170637f5db2279d1f71af33a49e49b
linuxlinux>= 9b4b7c1f9f54120940e243251e2b1407767b3381 < 8ca7eada62fcfabf6ec1dc7468941e791c1d87298ca7eada62fcfabf6ec1dc7468941e791c1d8729
linuxlinux_kernel>= 0 < 6.12.57-16.12.57-1
linuxlinux_kernel>= 0 < 6.17.6-16.17.6-1
linuxlinux_kernel>= 0 < 6.8.0-106.1066.8.0-106.106
linuxlinux_kernel>= 0 < 6.17.0-14.146.17.0-14.14
linuxlinux_kernel>= 6.13.0 < 6.17.36.17.3
linuxlinux_kernel>= 6.5.0 < 6.6.1126.6.112
linuxlinux_kernel>= 6.7.0 < 6.12.536.12.53
msrcazl3_kernel_6.6.104.2-4_on_azure_linux_3.0
ubuntulinux-aws
ubuntulinux-oracle
ubuntulinux-xilinx

CVSS provenance

nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
osv3.2LOW
vendor_ubuntu7.8HIGH
vendor_msrc6.6MEDIUM
vendor_redhat6.5MEDIUM
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