CVE-2026-5745
Libarchive: a null pointer dereference vulnerability exists in the acl parser of libarchive
No known exploitation. EPSS puts it in the 6th percentile. Fixed in 3.8.7-1.hum1.
No public exploit knownFix3.8.7-1.hum1Upgrade to this build
e.g. OID 1.3.6.1.4.1.25623.1.1.10.2026.0241
What to do
Find your product and version, then upgrade to the build on the right.
- Red Hat Hardened ImagesFixed builds3.8.7-1.hum1Stated by: CVE record
Versions as the sources state them. Full version matrix after sign-in
What it is
From the CVE record
A flaw was found in libarchive. A NULL pointer dereference vulnerability exists in the ACL parsing logic, specifically within the archive_acl_from_text_nl() function. When processing a malformed ACL string (such as a bare "d" or "default" tag without subsequent fields), the function fails to perform adequate validation before advancing the pointer. An attacker can exploit this by providing a maliciously crafted archive, causing an application utilizing the libarchive API (such as bsdtar) to crash, resulting in a Denial of Service (DoS).
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
0.2% chance of exploitation activity in the next 30 days, which ranks it in the 6th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
18 events over 213 days, from the signal feeds we watch.
- Workaround availablerecord updated
- Workaround availablerecord updated
- Workaround availablerecord updated
- Workaround availablerecord updated
- Workaround availablerecord updated
- Workaround availablerecord updated
Affected products
- hardened imagesOperating Systems / linux-distro
- openshift container platformOperating Systems / linux-distro
- Red Hat Enterprise Linux 10Operating Systems / linux-distro
- Red Hat Hardened ImagesOperating Systems / linux-distro
- Red Hat OpenShift AI (RHOAI)Cloud & SaaS
- Red Hat OpenShift Container Platform 4Cloud & SaaS / container-orchestration
And 5 more affected products. See all after sign-in
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Scored 5.5 by NVD.
How it is reached
- Attack Vector LocalRequires local access to the vulnerable system (e.g. local login, malicious file)
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required NoneNo authentication required — anyone can exploit this
- User Interaction RequiredA user must click a link, open a file, or perform some action
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality NoneNo confidentiality impact
- Integrity NoneNo integrity impact
- Availability HighTotal denial of service — the component is completely unavailable
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
Sources
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