CVE-2026-53124ublk: reset per-IO canceled flag on each fetch
Updated under an hour ago ()
Does this affect you?
It affects Linux and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
In the Linux kernel, the following vulnerability has been resolved: ublk: reset per-IO canceled flag on each fetch If a ublk server starts recovering devices but dies before issuing fetch commands for all IOs, cancellation of the fetch commands that were successfully issued may never complete. This is because the per-IO canceled flag can remain set even after the fetch for that IO has been submitted - the per-IO canceled flags for all IOs in a queue are reset together only once all IOs for that queue have been fetched. So if a nonempty proper subset of the IOs for a queue are fetched when the ublk server dies, the IOs in that subset will never successfully be canceled, as their canceled flags remain set, and this prevents ublk_cancel_cmd from actually calling io_uring_cmd_done on the commands, despite the fact that they are outstanding. Fix this by resetting the per-IO cancel flags immediately when each IO is fetched instead of waiting for all IOs for the queue (which may never happen).
- CVSS
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 728cbac5fe219d3b8a21a0688a08f2b7f8aeda2b before de05e37d02f3f33ebca4967164e54f5fea809d86; from 728cbac5fe219d3b8a21a0688a08f2b7f8aeda2b before 63335e5a67d89bb7cb9b023bbb3785896587a648; from 728cbac5fe219d3b8a21a0688a08f2b7f8aeda2b before 0842186d2c4e67d2f8c8c2d1d779e8acffd41b5b; 42ea64e01c96e594fb4f80c54dfe4f934d008a6e; from 6.14.6 before 6.15 | CNA record |
linux linux_kernel linux:linux_kernel | from 6.14.6 before 6.15; from 6.15.1 before 7.0.10; 6.15; 6.15; 6.15; 6.15; 6.15; 6.15 | NVD |
References
- https://git.kernel.org/stable/c/de05e37d02f3f33ebca4967164e54f5fea809d86
- https://git.kernel.org/stable/c/63335e5a67d89bb7cb9b023bbb3785896587a648patch
- https://git.kernel.org/stable/c/0842186d2c4e67d2f8c8c2d1d779e8acffd41b5bpatch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.