CVE-2023-53250: firmware: dmi-sysfs: Fix null-ptr-deref in dmi_sysfs_register_handle
Vulnerability summary
CVE-2023-53250 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.15% chance of exploitation in the next 30 days, higher than 4% of scored vulnerabilities.
Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 5 · Related 5Timeline
- 15-09-2025PublishedVulnerability first disclosed.
- 23-05-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: firmware: dmi-sysfs: Fix null-ptr-deref in dmi_sysfs_register_handle KASAN reported a null-ptr-deref error: KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 PID: 1373 Comm: modprobe Hardware name: QEMU Standard PC (i440FX + PIIX, 1996) RIP: 0010:dmi_sysfs_entry_release ... Call Trace: <TASK> kobject_put dmi_sysfs_register_handle (drivers/firmware/dmi-sysfs.c:540) dmi_sysfs dmi_decode_table (drivers/firmware/dmi_scan.c:133) dmi_walk (drivers/firmware/dmi_scan.c:1115) dmi_sysfs_init (drivers/firmware/dmi-sysfs.c:149) dmi_sysfs do_one_initcall (init/main.c:1296) ... Kernel panic - not syncing: Fatal exception Kernel Offset: 0x4000000 from 0xffffffff81000000 ---[ end Kernel panic - not syncing: Fatal exception ]--- It is because previous patch added kobject_put() to release the memory which will call dmi_sysfs_entry_release() and list_del(). However, list_add_tail(entry->list) is called after the error block, so the list_head is uninitialized and cannot be deleted. Move error handling to after list_add_tail to fix this.
CVSS metrics
4 scores · 4 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- NVDNIST5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.15%
Chance of exploitation in the next 30 days
Percentile
4%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.14% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu122 products
- linuxAll versions (No fix recorded) | < 5.15.0-75.82
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 5.15.0-1038.43
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ fdffa4ad8f6bf1ece877edfb807f2b2c729d8578, < b4fe158259fb5fead52ff2b55841ec5c39492604 | ≥ 660ba678f9998aca6db74f2dd912fa5124f0fa31, < e851996b32264e78a10863c2ac41a8689d7b9252 | ≥ 660ba678f9998aca6db74f2dd912fa5124f0fa31, < 5d0492d1d934642bdfd2057acc1b56f4b57be465 | ≥ 660ba678f9998aca6db74f2dd912fa5124f0fa31, < 18e126e97c961f7a93823795c879d7c085fe5098 | a9bfb37d6ba7c376b0d53337a4c5f5ff324bd725 | ed38d04342dfbe9e5aca745c8b5eb4188a74f0ef | c66cc3c62870a27ea8f060a7e4c1ad8d26dd3f0d | a724634b2a49f6ff0177a9e19a5a92fc1545e1b7 | 985706bd3bbeffc8737bc05965ca8d24837bc7db | 3ba359ebe914ac3f8c6c832b28007c14c39d3766 | ec752973aa721ee281d5441e497364637c626c7b | ≥ 5.15.47, < 5.15.99 | ≥ 4.9.318, < 4.10 | ≥ 4.14.283, < 4.15 | ≥ 4.19.247, < 4.20 | ≥ 5.4.198, < 5.5 | ≥ 5.10.122, < 5.11 | ≥ 5.17.15, < 5.18 | ≥ 5.18.4, < 5.19 | 5.19
- linux_kernel≥ 4.9.318, < 4.10 | ≥ 4.14.283, < 4.15 | ≥ 4.19.247, < 4.20 | ≥ 5.4.198, < 5.5 | ≥ 5.10.122, < 5.11 | ≥ 5.15.47, < 5.15.99 | ≥ 5.17.15, < 5.18 | ≥ 5.18.4, < 6.1.16 | ≥ 6.2, < 6.2.3
Debian1 product
- linux< 6.1.20-1
3 vendors · 125 products
