CVE-2024-45490VulnerabilityPublished 18 Sep 2024Updated 11 Oct 2026

SUSE · security update for expat

Affects SUSESource GCVE Database

Mentioned vulnerabilities

Authoritative record:CVE-2024-45490· Critical 9.8

Not known to be exploited · CVSS 9.8 Critical : upgrade SUSE to 2.6.3 as a priority.

Data as of 26 Oct 2026, 09:15 UTC

CVSS 3.1 base score

9.8Critical

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 1.6% chance of exploitation in 30 days – higher than 76% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 2.6.3

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

Exploitation evidence

Disclosed: evidence found.
CVE published 30 Aug 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade libexpat/libexpat to 2.6.3.

Affected software

Product	Affected	Fixed in
GitHublibexpat/libexpat`pkg:github/libexpat/libexpat`Other threats	Affected <2.6.3	Fixed in 2.6.3

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Red Hat has released security updates for libexpat addressing these vulnerabilities. Users of Red Hat Enterprise Linux 9 on affected architectures should apply the provided security updates as described in the Red Hat advisory RHSA-2024:6754. No additional mitigation steps are indicated beyond applying the official patches.

Description

Multiple moderate severity security vulnerabilities have been identified in the libexpat XML parsing library used in Red Hat Enterprise Linux 9. These include a negative length parsing vulnerability and integer overflow issues. Security updates addressing these issues are available for various architectures including x86_64, aarch64, s390x, and ppc64le. Users are advised to apply these updates to mitigate the vulnerabilities.

Impact

The vulnerabilities could potentially allow malformed XML input to cause incorrect processing due to negative length parsing or integer overflow conditions. This may lead to application errors or unexpected behavior in software relying on libexpat. The impact is rated moderate by Red Hat Product Security, indicating a limited but non-negligible risk.

Summary

The libexpat C library for XML parsing in Red Hat Enterprise Linux 9 contains multiple security vulnerabilities: a negative length parsing vulnerability (CVE-2024-45490) and two integer overflow or wraparound issues (CVE-2024-45491 and CVE-2024-45492). These vulnerabilities have been rated moderate severity by Red Hat Product Security. Updates fixing these issues have been released for Red Hat Enterprise Linux 9 across multiple architectures. The vendor advisory provides detailed information and instructions for applying the updates.

CWE-190Integer Overflow or Wraparound (opens in a new tab)
Base weaknessLikelihood of exploit: Medium
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
Requirements
Ensure that all protocols are strictly defined, such that all out-of-bounds behavior can be identified simply, and require strict conformance to the protocol.
Requirements · Language Selection
Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
Architecture and Design · Libraries or Frameworks
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
OWASP Cheat Sheets
XML Security (opens in a new tab)
Mass Assignment (opens in a new tab)
OWASP ASVS 4.0.3
V5.4.3 (opens in a new tab)
V13.3.1 (opens in a new tab)
V5.1.4 (opens in a new tab)
Attack patterns
Forced Integer Overflow (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 11 Oct 2026, 22:31 UTC

WeaknessesCWE-190

Technical details

References

Community reviews

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