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medium5.5

CVE-2023-52462

In the Linux kernel, the following vulnerability has been resolved: bpf: fix check for attempt to corrupt spilled pointer When register is spilled onto a stack…

Impact

In the Linux kernel, the following vulnerability has been resolved: bpf: fix check for attempt to corrupt spilled pointer When register is spilled onto a stack as a 1/2/4-byte register, we set slot_type[BPF_REG_SIZE - 1] (plus potentially few more below it, depending on actual spill size). So to check if some stack slot has spilled register we need to consult slot_type[7], not slot_type[0]. To avoid the need to remember and double-check this in the future, just use is_spilled_reg() helper.

Affected products

VendorProductAffected versions
LinuxLinux Kernel
before 5.10.209
from 5.11.0 before 5.15.148
from 5.16.0 before 6.1.75
from 6.2.0 before 6.6.14
from 6.7.0 before 6.7.2

Weakness classification

CWE-476

References