UBUNTU-CVE-2025-37906
In the Linux kernel, the following vulnerability has been resolved: ublk: fix race between io_uring_cmd_complete_in_task and ublk_cancel_cmd ublk_cancel_cmd() calls io_uring_cmd_done() to complete uring_cmd, but we may have scheduled task work via io_uring_cmd_complete_in_task() for dispatching request, then kernel crash can be triggered. Fix it by not trying to canceling the command if ublk block request is started.
02 / AFFECTED SOFTWARE
Affected packages
21 explicit affected versions
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48 explicit affected versions
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22 explicit affected versions
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1 explicit affected versions
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50 explicit affected versions
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8 explicit affected versions
7 explicit affected versions
1 explicit affected versions
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10 explicit affected versions
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42 explicit affected versions
26 explicit affected versions
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7 explicit affected versions
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10 explicit affected versions
13 explicit affected versions
26 explicit affected versions
42 explicit affected versions
37 explicit affected versions
48 explicit affected versions
1 explicit affected versions
48 explicit affected versions
16 explicit affected versions
53 explicit affected versions
3 explicit affected versions
7 explicit affected versions
51 explicit affected versions
18 explicit affected versions
43 explicit affected versions
12 explicit affected versions
27 explicit affected versions
45 explicit affected versions
8 explicit affected versions
5 explicit affected versions
3 explicit affected versions
8 explicit affected versions
49 explicit affected versions
13 explicit affected versions
13 explicit affected versions
7 explicit affected versions
8 explicit affected versions
10 explicit affected versions
12 explicit affected versions
1 explicit affected versions
44 explicit affected versions
16 explicit affected versions
3 explicit affected versions
13 explicit affected versions
26 explicit affected versions
45 explicit affected versions
37 explicit affected versions
53 explicit affected versions
14 explicit affected versions
38 explicit affected versions
9 explicit affected versions
11 explicit affected versions
42 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
In the Linux kernel, the following vulnerability has been resolved: ublk: fix race between io_uring_cmd_complete_in_task and ublk_cancel_cmd ublk_cancel_cmd() calls io_uring_cmd_done() to complete uring_cmd, but we may have scheduled task work via io_uring_cmd_complete_in_task() for dispatching request, then kernel crash can be triggered. Fix it by not trying to canceling the command if ublk block request is started.
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/f40139fde5278d81af3227444fd6e76a76b9506d
- https://git.kernel.org/stable/c/f40139fde5278d81af3227444fd6e76a76b9506d
- https://git.kernel.org/stable/c/fb2eb9ddf556f93fef45201e1f9d2b8674bcc975
- https://ubuntu.com/security/CVE-2025-37906
- https://ubuntu.com/security/notices/USN-7649-1
- https://ubuntu.com/security/notices/USN-7649-2
- https://ubuntu.com/security/notices/USN-7650-1
- https://ubuntu.com/security/notices/USN-7665-1
- https://ubuntu.com/security/notices/USN-7665-2
- https://ubuntu.com/security/notices/USN-7721-1
- https://www.cve.org/CVERecord?id=CVE-2025-37906