Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: platform/x86: hp-bioscfg: Fix kernel panic in GET_INSTANCE_ID macro The GET_INSTANCE_ID macro that caused a kernel panic when accessing sysfs attributes: 1. Off-by-one error: The loop condition used '<=' instead of '<', causing access beyond array bounds. Since array indices are 0-based and go from 0 to instances_count-1, the loop should use '<'. 2. Missing NULL check: The code dereferenced attr_name_kobj->name without checking if attr_name_kobj was NULL, causing a null pointer dereference in min_length_show() and other attribute show functions. The panic occurred when fwupd tried to read BIOS configuration attributes: Oops: general protection fault [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] RIP: 0010:min_length_show+0xcf/0x1d0 [hp_bioscfg] Add a NULL check for attr_name_kobj before dereferencing and corrects the loop boundary to match the pattern used elsewhere in the driver.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 5f94f181ca25d8c5b77beb2da0cb466ddb6ece29 before eb5ff1025c92117d5d1cc728bcfa294abe484da1; affected 5f94f181ca25d8c5b77beb2da0cb466ddb6ece29 before eba49c1dee9c5e514ca18e52c545bba524e8a045; affected 5f94f181ca25d8c5b77beb2da0cb466ddb6ece29 before 193922a23d7294085a47d7719fdb7d66ad0a236f; affected 5f94f181ca25d8c5b77beb2da0cb466ddb6ece29 before 25150715e0b049b99df664daf05dab12f41c3e13 |
| Linux / Linux | affected 6.6; unaffected 0 before 6.6; unaffected 6.6.122 through 6.6.*; unaffected 6.12.68 through 6.12.*; unaffected 6.18.8 through 6.18.*; unaffected 6.19 through * |
CWE
No CWE identifiers supplied.