CVE-2021-46102

Name: CVE-2021-46102
Creator: NVD / NIST
Published: 2022-01-27T18:15:07.77+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.87%

Last modified Jun 17, 2026

CVE-2021-46102 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. From version 0.2.14 to 0.2.16 for Solana rBPF, function "relocate" in the file src/elf.rs has an integer overflow bug because the sym.st_value is read directly from ELF file without checking. If the sym.st_value is rather large, an integer overflow is triggered while calculating the variable "addr" via "addr = (sym.st_value + refd_pa) as u64";. EPSS estimates a 1.87% chance of exploitation in the next 30 days.

Description

From version 0.2.14 to 0.2.16 for Solana rBPF, function "relocate" in the file src/elf.rs has an integer overflow bug because the sym.st_value is read directly from ELF file without checking. If the sym.st_value is rather large, an integer overflow is triggered while calculating the variable "addr" via "addr = (sym.st_value + refd_pa) as u64";

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

1.87%

76.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-190

Affected Software

Vendor	Product	Versions
Solanalabs	Rbpf	>= 0.2.14, <= 0.2.16

References

https://blocksecteam.medium.com/new-integer-overflow-bug-discovered-in-solana-rbpf-7729717159eeExploit, Third Party Advisory
https://github.com/solana-labs/rbpf/blob/c14764850f0b83b58aa013248eaf6d65836c1218/src/elf.rs#L609-L630Exploit, Third Party Advisory
https://github.com/solana-labs/rbpf/pull/200Patch, Third Party Advisory
https://github.com/solana-labs/rbpf/pull/236Patch, Third Party Advisory
https://blocksecteam.medium.com/new-integer-overflow-bug-discovered-in-solana-rbpf-7729717159eeExploit, Third Party Advisory
https://github.com/solana-labs/rbpf/blob/c14764850f0b83b58aa013248eaf6d65836c1218/src/elf.rs#L609-L630Exploit, Third Party Advisory
https://github.com/solana-labs/rbpf/pull/200Patch, Third Party Advisory
https://github.com/solana-labs/rbpf/pull/236Patch, Third Party Advisory

Timeline

Published: Jan 27, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-46102?

How severe is CVE-2021-46102?

CVE-2021-46102 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.87% probability of exploitation in the next 30 days.

How do I fix CVE-2021-46102?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-46102?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST