CVE-2025-37759 [Medium] | Security Vulnerability in Linux Kernel

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.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-07-01	0.15%	0.15%	+0.01%
2	2026-06-15	0.03%	0.15%	+0.12%
3	2026-06-09	—	0.03%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-07-01

0.15%

+0.01%

2026-06-15

0.03%

0.15%

+0.12%

2026-06-09

—

0.03%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
5.5	3.1	MEDIUM	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H` Click to expand Attack vector (AV:L) They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:L) A normal user session is enough; they don’t have to be admin. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	1.8	3.6	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

5.5

3.1

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Click to expand

Attack vector (AV:L): They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L): A normal user session is enough; they don’t have to be admin.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

1.8

3.6

[email protected]

OS Trackers for CVE-2025-37759

vendor	priority	summary	link
`debian`	unimportant	CVE-2025-37759 unimportant priority: Debian including 1 source packages (linux), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5.	https://security-tracker.debian.org/tracker/CVE-2025-37759
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2025-37759
`suse`	medium	CVE-2025-37759 severity moderate: SUSE including 52 source package names (cluster-md-kmp-default, dlm-kmp-default, …), 252 product×package rows across 48 product lines (SLES-LTSS-TERADATA 15 SP2, SUSE Linux Enterprise High Availability Extension 15 SP7, … (48 product lines)): Known Not Affected 156, Will Not Fix 70, Fixed 26.	https://www.suse.com/security/cve/CVE-2025-37759/
`ubuntu`	medium	CVE-2025-37759 medium priority: Ubuntu including 158 source packages (linux, linux-allwinner-5.19, …), 1551 status rows across 10 suites (bionic, focal, jammy, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 1145, ignored 164, released 130, not-affected 107, needed 2, needs-triage 2, pending 1.	https://ubuntu.com/security/CVE-2025-37759

Affected software / configurations for CVE-2025-37759

Vendor	Product	Version	Raw CPE
linux	linux_kernel	>= 6.5, < 6.12.24	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.13, < 6.13.12	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.14, < 6.14.3	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	6.15	cpe:2.3:o:linux:linux_kernel:6.15:rc1::::::

References for CVE-2025-37759

URL	Tags
https://git.kernel.org/stable/c/0a21d259ca4d6310fdfcc0284ebbc000e66cbf70	Patch
https://git.kernel.org/stable/c/5d34a30efac9c9c93e150130caa940c0df6053c1	Patch
https://git.kernel.org/stable/c/6ee6bd5d4fce502a5b5a2ea805e9ff16e6aa890f	Patch
https://git.kernel.org/stable/c/caa5c8a2358604f38bf0a4afaa5eacda13763067	Patch

URL

CVE-2025-37759 | ublk: fix handling recovery & reissue in ublk_abort_queue()

Exploit prediction scoring system (EPSS) score for CVE-2025-37759

Common vulnerability scoring system (CVSS) metrics for CVE-2025-37759

Weakness enumeration for CVE-2025-37759

OS Trackers for CVE-2025-37759

Affected software / configurations for CVE-2025-37759

References for CVE-2025-37759