CVE-2021-46333: Moddable SDK v11.5.0 was discovered to contain an invalid memory access vulnerability via the component __asan

Routine

MEDIUM 5.5DOWNGRADE

CVE-2021-46333 is a medium-severity flaw (CVSS 5.5) affecting moddable sdk. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Moddable SDK v11.5.0 was discovered to contain an invalid memory access vulnerability via the component __asan_memmove.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.7% (top 46%)
CISA exploited list	No
Weakness	CWE-119
Published	2022-01-20
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: moddable

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

Am I affected?

Timeline

2022-01-20 22:15 UTCPublished CVE record published
2026-06-17 04:14 UTCUpdated Record last modified

moddable moddable sdk DOWNGRADE

Affected: 11.5.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 11.5.0

1. Check installed version

apt-cache policy moddable-sdk || rpm -q moddable-sdk || moddable-sdk --version

2. No fixed release: DOWNGRADE to a release before 11.5.0 (Debian / Ubuntu)

apt-cache madison moddable-sdk sudo apt install moddable-sdk=<VERSION_BEFORE_11.5.0> sudo apt-mark hold moddable-sdk

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list moddable-sdk sudo dnf downgrade moddable-sdk-<VERSION_BEFORE_11.5.0> sudo dnf versionlock add moddable-sdk

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-2021-46333?

moddable sdk: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-46333 being exploited?

CVE-2021-46333 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-2021-46333 affect?

CVE-2021-46333 affects moddable sdk. Severity is medium (CVSS 5.5). Moddable SDK v11.5.0 was discovered to contain an invalid memory access vulnerability via the component __asan_memmove.

How urgent is CVE-2021-46333?

Priority 38/100. Public exploit reference

Related CVEs

CVE-2021-46335 MEDIUM 5.5 DOWNGRADE Moddable SDK v11.5.0 was discovered to contain a NULL pointer dereference in the component fx_Function_prototy
CVE-2021-46334 HIGH 7.8 DOWNGRADE Moddable SDK v11.5.0 was discovered to contain a stack buffer overflow via the component __interceptor_strcat.
CVE-2021-46332 HIGH 7.8 DOWNGRADE Moddable SDK v11.5.0 was discovered to contain a heap-buffer-overflow via xs/sources/xsDataView.c in fxUint8Ge
CVE-2021-46331 MEDIUM 5.5 DOWNGRADE Moddable SDK v11.5.0 was discovered to contain a SEGV vulnerability via xs/sources/xsProxy.c in fxProxyGetProt
CVE-2021-46330 MEDIUM 5.5 DOWNGRADE Moddable SDK v11.5.0 was discovered to contain a SEGV vulnerability via xs/sources/xsDataView.c in fx_ArrayBuf

References

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