# CVE-2023-53250: linux: In the Linux kernel, the following vulnerability has been resolved: firmware: dmi-sysfs: Fix null-ptr-deref in dmi_s... CVE-2023-53250 is fixed in 20 products on 1 platform, first by ALAS2023-2023-138, released March 20, 2023. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2023-53250 - Priority: Routine - CVSS: 5.5 (medium) - EPSS: 0.0015 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Mar 20, 2023 ## 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: 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. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | bpftool amzn 2023 | 6.1.19-30.43.amzn2023 | [ALAS2023-2023-138](https://patchblox.com/security/data/fix/linux/alas2023-2023-138.md) | Mar 20, 2023 | | Linux | bpftool-debuginfo amzn 2023 | 6.1.19-30.43.amzn2023 | [ALAS2023-2023-138](https://patchblox.com/security/data/fix/linux/alas2023-2023-138.md) | Mar 20, 2023 | | Linux | kernel amzn 2023 | 6.1.19-30.43.amzn2023 | [ALAS2023-2023-138](https://patchblox.com/security/data/fix/linux/alas2023-2023-138.md) | Mar 20, 2023 | | Linux | kernel-debuginfo amzn 2023 | 6.1.19-30.43.amzn2023 | [ALAS2023-2023-138](https://patchblox.com/security/data/fix/linux/alas2023-2023-138.md) | Mar 20, 2023 | | Linux | kernel-debuginfo-common-aarch64 amzn 2023 | 6.1.19-30.43.amzn2023 | [ALAS2023-2023-138](https://patchblox.com/security/data/fix/linux/alas2023-2023-138.md) | Mar 20, 2023 | | Linux | kernel-debuginfo-common-x86_64 amzn 2023 | 6.1.19-30.43.amzn2023 | [ALAS2023-2023-138](https://patchblox.com/security/data/fix/linux/alas2023-2023-138.md) | Mar 20, 2023 | | Linux | kernel-devel amzn 2023 | 6.1.19-30.43.amzn2023 | [ALAS2023-2023-138](https://patchblox.com/security/data/fix/linux/alas2023-2023-138.md) | Mar 20, 2023 | | Linux | kernel-headers amzn 2023 | 6.1.19-30.43.amzn2023 | [ALAS2023-2023-138](https://patchblox.com/security/data/fix/linux/alas2023-2023-138.md) | Mar 20, 2023 | | Linux | kernel-libbpf amzn 2023 | 6.1.19-30.43.amzn2023 | [ALAS2023-2023-138](https://patchblox.com/security/data/fix/linux/alas2023-2023-138.md) | Mar 20, 2023 | | Linux | kernel-libbpf-devel amzn 2023 | 6.1.19-30.43.amzn2023 | [ALAS2023-2023-138](https://patchblox.com/security/data/fix/linux/alas2023-2023-138.md) | Mar 20, 2023 | | Linux | kernel-libbpf-static amzn 2023 | 6.1.19-30.43.amzn2023 | [ALAS2023-2023-138](https://patchblox.com/security/data/fix/linux/alas2023-2023-138.md) | Mar 20, 2023 | | Linux | kernel-livepatch-6.1.19-30.43 amzn 2023 | 1.0-0.amzn2023 | [ALAS2023-2023-138](https://patchblox.com/security/data/fix/linux/alas2023-2023-138.md) | Mar 20, 2023 | | Linux | kernel-tools amzn 2023 | 6.1.19-30.43.amzn2023 | [ALAS2023-2023-138](https://patchblox.com/security/data/fix/linux/alas2023-2023-138.md) | Mar 20, 2023 | | Linux | kernel-tools-debuginfo amzn 2023 | 6.1.19-30.43.amzn2023 | [ALAS2023-2023-138](https://patchblox.com/security/data/fix/linux/alas2023-2023-138.md) | Mar 20, 2023 | | Linux | kernel-tools-devel amzn 2023 | 6.1.19-30.43.amzn2023 | [ALAS2023-2023-138](https://patchblox.com/security/data/fix/linux/alas2023-2023-138.md) | Mar 20, 2023 | | Linux | linux Debian 12.15 (bookworm) | 6.1.20-1 | [DEBIAN-CVE-2023-53250](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53250.md) | Sep 15, 2025 | | Linux | linux Debian 13.5 (trixie) | 6.1.20-1 | [DEBIAN-CVE-2023-53250](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53250.md) | Sep 15, 2025 | | Linux | linux Debian 14 | 6.1.20-1 | [DEBIAN-CVE-2023-53250](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53250.md) | Sep 15, 2025 | | Linux | perf amzn 2023 | 6.1.19-30.43.amzn2023 | [ALAS2023-2023-138](https://patchblox.com/security/data/fix/linux/alas2023-2023-138.md) | Mar 20, 2023 | | Linux | perf-debuginfo amzn 2023 | 6.1.19-30.43.amzn2023 | [ALAS2023-2023-138](https://patchblox.com/security/data/fix/linux/alas2023-2023-138.md) | Mar 20, 2023 | | Linux | python3-perf amzn 2023 | 6.1.19-30.43.amzn2023 | [ALAS2023-2023-138](https://patchblox.com/security/data/fix/linux/alas2023-2023-138.md) | Mar 20, 2023 | | Linux | python3-perf-debuginfo amzn 2023 | 6.1.19-30.43.amzn2023 | [ALAS2023-2023-138](https://patchblox.com/security/data/fix/linux/alas2023-2023-138.md) | Mar 20, 2023 | --- Data as of 2026-11-09T07:25:28Z UTC. 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