CVE-2026-89588

Summary

In the Linux kernel, the following vulnerability has been resolved:

ACPI: APEI: GHES: fix ARM section length accounting after header

In ghes_handle_arm_hw_error(), after skipping the cper_sec_proc_arm header with (err + 1), the remaining length was reduced by sizeof(err) (pointer size) instead of sizeof(*err) (structure size).

That overestimates the bytes left for cper_arm_err_info records and can let the parser read past the CPER section when err_info_num is large enough relative to error_data_length.

Use sizeof(*err) so the length accounting matches the pointer advance and the earlier sizeof(*err) size check.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux242c652849d979d0133c315a42d9acea0ff88390 < 5ff385e9403e87ae33f65b8c38698d3b1e92cfdeaffected
LinuxLinux136093ba4161e0080088abff48273f6830a47766 < 452eb28e03015abec6d4bf6488ee567706ade4e1affected
LinuxLinux87880af2d24e62a84ed19943dbdd524f097172f2 < b48b613073c3d652cb1823c15d16f7067cf4cee4affected
LinuxLinux87880af2d24e62a84ed19943dbdd524f097172f2 < 903308ea40adf0577d82eab69882faf8836326ceaffected
LinuxLinuxdb103b8bd3a4aca69b1b5fe8831a6ed75ac4b3bdaffected
LinuxLinux6.12.75 < 6.12.109affected
LinuxLinux6.18.16 < 6.18.50affected
LinuxLinux6.19.6 < 6.20affected
LinuxLinux7.0affected
LinuxLinux0 < 7.0unaffected
LinuxLinux6.12.109 <= 6.12.*unaffected
LinuxLinux6.18.50 <= 6.18.*unaffected
LinuxLinux7.2.4 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References