CVE-2023-53611 [Medium] | Information Disclosure in Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: ipmi_si: fix a memleak in try_smi_init() Kmemleak reported the following leak info in try_smi_init(): unreferenced object 0xffff00018ecf9400 (size 1024): comm "modprobe", pid 2707763, jiffies 4300851415 (age 773.308s) backtrace: [<000000004ca5b312>] __kmalloc+0x4b8/0x7b0 [<00000000953b1072>] try_smi_init+0x148/0x5dc [ipmi_si] [<000000006460d325>] 0xffff800081b10148 [<0000000039206ea5>] do_one_initcall+0x64/0x2a4 [<00000000601399ce>] do_init_module+0x50/0x300 [<000000003c12ba3c>] load_module+0x7a8/0x9e0 [<00000000c246fffe>] __se_sys_init_module+0x104/0x180 [<00000000eea99093>] __arm64_sys_init_module+0x24/0x30 [<0000000021b1ef87>] el0_svc_common.constprop.0+0x94/0x250 [<0000000070f4f8b7>] do_el0_svc+0x48/0xe0 [<000000005a05337f>] el0_svc+0x24/0x3c [<000000005eb248d6>] el0_sync_handler+0x160/0x164 [<0000000030a59039>] el0_sync+0x160/0x180 The problem was that when an error occurred before handlers registration and after allocating `new_smi->si_sm`, the variable wouldn't be freed in the error handling afterwards since `shutdown_smi()` hadn't been registered yet. Fix it by adding a `kfree()` in the error handling path in `try_smi_init()`.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2025-10-05	—	0.02%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2025-10-05

—

0.02%

—

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-2023-53611

vendor	priority	summary	link
`debian`	not yet assigned	CVE-2023-53611 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-2023-53611
`redhat`	low	—	https://access.redhat.com/security/cve/CVE-2023-53611
`suse`	medium	—	https://www.suse.com/security/cve/CVE-2023-53611/
`ubuntu`	medium	CVE-2023-53611 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, released 141, not-affected 97, needs-triage 1.	https://ubuntu.com/security/CVE-2023-53611

Affected software / configurations for CVE-2023-53611

Vendor	Product	Version	Raw CPE
linux	linux_kernel	>= 4.18, < 4.19.295	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 4.20, < 5.4.257	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.5, < 5.10.195	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.11, < 5.15.132	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.16, < 6.1.53	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.2, < 6.4.16	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.5, < 6.5.3	cpe:2.3:o:linux:linux_kernel::::::::

References for CVE-2023-53611

URL	Tags
https://git.kernel.org/stable/c/09cb2a71b2e982015fe0464f28da1ab42b8e6375	Patch
https://git.kernel.org/stable/c/1bfcfea0fae0d0a6c6ff5543e6d704b3807b83ce	Patch
https://git.kernel.org/stable/c/5c5f02e16b919c8cb6024dc3778c8d8f1fb1f26b	Patch
https://git.kernel.org/stable/c/6cf1a126de2992b4efe1c3c4d398f8de4aed6e3f	Patch
https://git.kernel.org/stable/c/7291af9a738d936c2d6869d030711dceb68404d0	Patch
https://git.kernel.org/stable/c/b9bc8fbb2d416ce87f0342478dc9fcfd79f2c65f	Patch
https://git.kernel.org/stable/c/cbb7d8a4b4beb3061b3a1847a742983a01dca381	Patch
https://git.kernel.org/stable/c/f53ab5a2bf20fed59a2f7542d3453228b8056358	Patch

URL

CVE-2023-53611 | ipmi_si: fix a memleak in try_smi_init()

Exploit prediction scoring system (EPSS) score for CVE-2023-53611

Common vulnerability scoring system (CVSS) metrics for CVE-2023-53611

Weakness enumeration for CVE-2023-53611

OS Trackers for CVE-2023-53611

Affected software / configurations for CVE-2023-53611

References for CVE-2023-53611