CVE-2024-33259: Jerryscript commit cefd391 was discovered to contain a segmentation violation via the component scanner_seek a

Routine

MEDIUM 5.5DOWNGRADE

CVE-2024-33259 is a medium-severity flaw (CVSS 5.5) affecting jerryscript. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Jerryscript commit cefd391 was discovered to contain a segmentation violation via the component scanner_seek at jerry-core/parser/js/js-scanner-util.c.

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	0.3% (top 80%)
CISA exploited list	No
Weakness	CWE-400
Published	2024-04-26
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: jerryscript

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

Am I affected?

Timeline

2024-04-26 15:15 UTCPublished CVE record published
2026-06-17 07:31 UTCUpdated Record last modified

jerryscript jerryscript DOWNGRADE

Affected: 3.0.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.0.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 3.0.0 (Debian / Ubuntu)

apt-cache madison jerryscript sudo apt install jerryscript=<VERSION_BEFORE_3.0.0> sudo apt-mark hold jerryscript

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

dnf --showduplicates list jerryscript sudo dnf downgrade jerryscript-<VERSION_BEFORE_3.0.0> sudo dnf versionlock add jerryscript

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-2024-33259?

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

Is CVE-2024-33259 being exploited?

CVE-2024-33259 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-2024-33259 affect?

CVE-2024-33259 affects jerryscript. Severity is medium (CVSS 5.5). Jerryscript commit cefd391 was discovered to contain a segmentation violation via the component scanner_seek at jerry-core/parser/js/js-scanner-util.c.

How urgent is CVE-2024-33259?

Priority 29/100. Public exploit reference

Related CVEs

CVE-2024-33260 MEDIUM 5.1 DOWNGRADE Jerryscript commit cefd391 was discovered to contain a segmentation violation via the component parser_parse_c
CVE-2024-33258 HIGH 7.1 DOWNGRADE Jerryscript commit ff9ff8f was discovered to contain a segmentation violation via the component vm_loop at jer
CVE-2024-33255 MEDIUM 6.2 DOWNGRADE Jerryscript commit cefd391 was discovered to contain an Assertion Failure via ECMA_STRING_IS_REF_EQUALS_TO_ONE
CVE-2024-29489 MEDIUM 5.5 UPGRADE Jerryscript 2.4.0 has SEGV at ./jerry-core/ecma/base/ecma-helpers.c:238:58 in ecma_get_object_type.
CVE-2023-36109 CRITICAL 9.8 DOWNGRADE Buffer Overflow vulnerability in JerryScript version 3.0, allows remote attackers to execute arbitrary code vi

References

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