CVE-2021-46102: From version 0.2.14 to 0.2.16 for Solana rBPF, function "relocate" in the file src/elf.rs has an integer overf

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HIGH 7.5REMOTEUPGRADE

CVE-2021-46102 is a high-severity flaw (CVSS 7.5) affecting rbpf. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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";

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.9% (top 21%)
CISA exploited list	No
Weakness	CWE-190
Published	2022-01-27
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: solanalabs

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-01-27 18:15 UTCPublished CVE record published
2026-06-17 04:14 UTCUpdated Record last modified

solanalabs rbpf UPGRADE

Affected: >= 0.2.14 and <= 0.2.16

Fixed in: newer than 0.2.16

Safe to downgrade to: a release before 0.2.14

1. Check installed version

apt-cache policy rbpf || rpm -q rbpf || rbpf --version

2. UPGRADE to newer than 0.2.16 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade rbpf

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade rbpf

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 0.2.14 (Debian / Ubuntu)

apt-cache madison rbpf sudo apt install rbpf=<VERSION_BEFORE_0.2.14> sudo apt-mark hold rbpf

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list rbpf sudo dnf downgrade rbpf-<VERSION_BEFORE_0.2.14> sudo dnf versionlock add rbpf

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-46102?

rbpf: upgrade to newer than 0.2.16. Exact commands for each OS are on this page.

Is CVE-2021-46102 being exploited?

CVE-2021-46102 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-46102 affect?

CVE-2021-46102 affects rbpf. Severity is high (CVSS 7.5). 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

How urgent is CVE-2021-46102?

Priority 56/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2022-31264 HIGH 7.5 UPGRADE Solana solana_rbpf before 0.2.29 has an addition integer overflow via invalid ELF program headers
CVE-2022-23066 CRITICAL 9.1 DOWNGRADE In Solana rBPF versions 0.2.26 and 0.2.27 are affected by Incorrect Calculation which is caused by improper im

References

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