CVE-2023-53106 [High] | Use-After-Free in Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: nfc: st-nci: Fix use after free bug in ndlc_remove due to race condition This bug influences both st_nci_i2c_remove and st_nci_spi_remove. Take st_nci_i2c_remove as an example. In st_nci_i2c_probe, it called ndlc_probe and bound &ndlc->sm_work with llt_ndlc_sm_work. When it calls ndlc_recv or timeout handler, it will finally call schedule_work to start the work. When we call st_nci_i2c_remove to remove the driver, there may be a sequence as follows: Fix it by finishing the work before cleanup in ndlc_remove CPU0 CPU1 |llt_ndlc_sm_work st_nci_i2c_remove | ndlc_remove | st_nci_remove | nci_free_device| kfree(ndev) | //free ndlc->ndev | |llt_ndlc_rcv_queue |nci_recv_frame |//use ndlc->ndev

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.03%	0.16%	+0.14%
2	2026-06-10	0.06%	0.03%	-0.04%
3	2026-02-26	—	0.06%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.03%

0.16%

+0.14%

2026-06-10

0.06%

0.03%

-0.04%

2026-02-26

—

0.06%

—

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-2023-53106

vendor	priority	summary	link
`debian`	not yet assigned	CVE-2023-53106 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-2023-53106
`redhat`	—	—	https://access.redhat.com/security/cve/CVE-2023-53106
`suse`	medium	—	https://www.suse.com/security/cve/CVE-2023-53106/
`ubuntu`	medium	CVE-2023-53106 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, released 164, ignored 146, not-affected 95, needs-triage 1.	https://ubuntu.com/security/CVE-2023-53106

Affected software / configurations for CVE-2023-53106

Vendor	Product	Version	Raw CPE
linux	linux_kernel	>= 3.17, < 4.14.311	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 4.15, < 4.19.279	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 4.20, < 5.4.238	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.5, < 5.10.176	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.11, < 5.15.104	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.16, < 6.1.21	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.2, < 6.2.8	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	6.3	cpe:2.3:o:linux:linux_kernel:6.3:rc1::::::
linux	linux_kernel	6.3	cpe:2.3:o:linux:linux_kernel:6.3:rc2::::::

References for CVE-2023-53106

URL	Tags
https://git.kernel.org/stable/c/2156490c4b7cacda9a18ec99929940b8376dc0e3	Patch
https://git.kernel.org/stable/c/3405eb641dafcc8b28d174784b203c1622c121bf	Patch
https://git.kernel.org/stable/c/43aa468df246175207a7d5d7d6d31b231f15b49c	Patch
https://git.kernel.org/stable/c/5000fe6c27827a61d8250a7e4a1d26c3298ef4f6	Patch
https://git.kernel.org/stable/c/5e331022b448fbc5e76f24349cd0246844dcad25	Patch
https://git.kernel.org/stable/c/84dd9cc34014e3a3dcce0eb6d54b8a067e97676b	Patch
https://git.kernel.org/stable/c/b0c202a8dc63008205a5d546559736507a9aae66	Patch
https://git.kernel.org/stable/c/f589e5b56c562d99ea74e05b1c3f0eab78aa17a3	Patch

URL

CVE-2023-53106 | nfc: st-nci: Fix use after free bug in ndlc_remove due to race condition

Exploit prediction scoring system (EPSS) score for CVE-2023-53106

Common vulnerability scoring system (CVSS) metrics for CVE-2023-53106

Weakness enumeration for CVE-2023-53106

OS Trackers for CVE-2023-53106

Affected software / configurations for CVE-2023-53106

References for CVE-2023-53106