Shodan
Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2021-46974

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix masking negation logic upon negative dst register The negation logic for the case where the off_reg is sitting in the dst register is not correct given then we cannot just invert the add to a sub or vice versa. As a fix, perform the final bitwise and-op unconditionally into AX from the off_reg, then move the pointer from the src to dst and finally use AX as the source for the original pointer arithmetic operation such that the inversion yields a correct result. The single non-AX mov in between is possible given constant blinding is retaining it as it's not an immediate based operation.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 1.2%
CVSS Severity
CVSS v3 Score 5.5
References
Products affected by CVE-2021-46974


Products
Pricing
Contact Us

Shodan ® - All rights reserved