CVE-2023-53613 [High] | Use-After-Free in Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: dax: Fix dax_mapping_release() use after free A CONFIG_DEBUG_KOBJECT_RELEASE test of removing a device-dax region provider (like modprobe -r dax_hmem) yields: kobject: 'mapping0' (ffff93eb460e8800): kobject_release, parent 0000000000000000 (delayed 2000) [..] DEBUG_LOCKS_WARN_ON(1) WARNING: CPU: 23 PID: 282 at kernel/locking/lockdep.c:232 __lock_acquire+0x9fc/0x2260 [..] RIP: 0010:__lock_acquire+0x9fc/0x2260 [..] Call Trace: <TASK> [..] lock_acquire+0xd4/0x2c0 ? ida_free+0x62/0x130 _raw_spin_lock_irqsave+0x47/0x70 ? ida_free+0x62/0x130 ida_free+0x62/0x130 dax_mapping_release+0x1f/0x30 device_release+0x36/0x90 kobject_delayed_cleanup+0x46/0x150 Due to attempting ida_free() on an ida object that has already been freed. Devices typically only hold a reference on their parent while registered. If a child needs a parent object to complete its release it needs to hold a reference that it drops from its release callback. Arrange for a dax_mapping to pin its parent dev_dax instance until dax_mapping_release().

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.02%	0.14%	+0.11%
2	2025-10-05	—	0.02%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.02%

0.14%

+0.11%

2025-10-05

—

0.02%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
7.8	3.1	HIGH	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	1.8	5.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

7.8

3.1

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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:H): Serious risk that confidential data gets exposed in a big way.
Integrity (I:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

1.8

5.9

[email protected]

OS Trackers for CVE-2023-53613

vendor	priority	summary	link
`debian`	not yet assigned	CVE-2023-53613 not yet assigned 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-2023-53613
`redhat`	low	—	https://access.redhat.com/security/cve/CVE-2023-53613
`suse`	medium	CVE-2023-53613 severity moderate: SUSE including 401 source package names (2.1.3-6.88:kernel-default-base-6.4.0-36.1.21.13, 2.1.3-7.105:kernel-rt-6.4.0-38.1, …), 791 product×package rows across 166 product lines (Container suse/sl-micro/6.0/base-os-container, Container suse/sl-micro/6.0/kvm-os-container, … (166 product lines)): Fixed 442, Known Affected 231, Known Not Affected 118.	https://www.suse.com/security/cve/CVE-2023-53613/
`ubuntu`	medium	CVE-2023-53613 medium priority: Ubuntu including 158 source packages (linux, linux-allwinner-5.19, …), 1414 status rows across 9 suites (bionic, focal, jammy, noble, plucky, questing, trusty, upstream, xenial): DNE 1017, ignored 158, not-affected 122, released 116, needs-triage 1.	https://ubuntu.com/security/CVE-2023-53613

Affected software / configurations for CVE-2023-53613

Vendor	Product	Version	Raw CPE
linux	linux_kernel	>= 5.10, < 5.10.188	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.11, < 5.15.121	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.16, < 6.1.39	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.2, < 6.3.13	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.4, < 6.4.4	cpe:2.3:o:linux:linux_kernel::::::::

References for CVE-2023-53613

URL	Tags
https://git.kernel.org/stable/c/03859868ab82d57bfdd0cea1bf31f9319a5dded0	Patch
https://git.kernel.org/stable/c/6d24b170a9db0456f577b1ab01226a2254c016a8	Patch
https://git.kernel.org/stable/c/7310b84821f043dcf77d5e6aa0ad55dc1e10a11d	Patch
https://git.kernel.org/stable/c/94a85474f5e3e518bdbf8c9f51cb343d734a04f7	Patch
https://git.kernel.org/stable/c/9c2f993b6ca903c030d58451b5bf9ea27d0d17fa	Patch
https://git.kernel.org/stable/c/f76db6781d76d8464ec2faa9752cc3fb2e4f6923	Patch

URL

CVE-2023-53613 | dax: Fix dax_mapping_release() use after free

Exploit prediction scoring system (EPSS) score for CVE-2023-53613

Common vulnerability scoring system (CVSS) metrics for CVE-2023-53613

Weakness enumeration for CVE-2023-53613

OS Trackers for CVE-2023-53613

Affected software / configurations for CVE-2023-53613

References for CVE-2023-53613