Riskcovery

CVE-2025-37759

ublk: fix handling recovery & reissue in ublk_abort_queue()

State
Published
Severity
Not scored
Published
May 1, 2025
Updated
Oct 21, 2026
Reserved
Apr 16, 2025

Read the record on cve.org

Description

In the Linux kernel, the following vulnerability has been resolved:

ublk: fix handling recovery & reissue in ublk_abort_queue()

Commit 8284066946e6 ("ublk: grab request reference when the request is handled by userspace") doesn't grab request reference in case of recovery reissue. Then the request can be requeued & re-dispatch & failed when canceling uring command.

If it is one zc request, the request can be freed before io_uring returns the zc buffer back, then cause kernel panic:

[ 126.773061] BUG: kernel NULL pointer dereference, address: 00000000000000c8 [ 126.773657] #PF: supervisor read access in kernel mode [ 126.774052] #PF: error_code(0x0000) - not-present page [ 126.774455] PGD 0 P4D 0 [ 126.774698] Oops: Oops: 0000 [#1] SMP NOPTI [ 126.775034] CPU: 13 UID: 0 PID: 1612 Comm: kworker/u64:55 Not tainted 6.14.0_blk+ #182 PREEMPT(full) [ 126.775676] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-1.fc39 04/01/2014 [ 126.776275] Workqueue: iou_exit io_ring_exit_work [ 126.776651] RIP: 0010:ublk_io_release+0x14/0x130 [ublk_drv]

Fixes it by always grabbing request reference for aborting the request.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 8284066946e6d9cc979566ce698fe24e7ca0b31e to before ab41bf5a211fbec3a85e025658ed90a911ccb692Affected
  • 8284066946e6d9cc979566ce698fe24e7ca0b31e to before caa5c8a2358604f38bf0a4afaa5eacda13763067Affected
  • 8284066946e6d9cc979566ce698fe24e7ca0b31e to before 5d34a30efac9c9c93e150130caa940c0df6053c1Affected
  • 8284066946e6d9cc979566ce698fe24e7ca0b31e to before 0a21d259ca4d6310fdfcc0284ebbc000e66cbf70Affected
  • 8284066946e6d9cc979566ce698fe24e7ca0b31e to before 6ee6bd5d4fce502a5b5a2ea805e9ff16e6aa890fAffected
LinuxLinux
  • 6.5Affected
  • before 6.5Not affected
  • 6.6.160 through 6.6.*Not affected
  • 6.12.24 through 6.12.*Not affected
  • 6.13.12 through 6.13.*Not affected
  • 6.14.3 through 6.14.*Not affected
  • 6.15 and laterNot affected

References

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