CVE-2026-4424
No exploitation reported by the sources we read.
- Published2026-03-19
- WeaknessCWE-125
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
A flaw was found in libarchive. This heap out-of-bounds read vulnerability exists in the RAR archive processing logic due to improper validation of the LZSS sliding window size after transitions between compression methods. A remote attacker can exploit this by providing a specially crafted RAR archive, leading to the disclosure of sensitive heap memory information without requiring authentication or user interaction.
Timeline
dates in UTC- 2026-03-1915:16CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-4424?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-4424?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 6.0 | = 6.0 | no fix published | NVD |
| 7.0 | = 7.0 | no fix published | NVD |
| 8.0 | = 8.0 | no fix published | NVD |
| 9.0 | = 9.0 | no fix published | NVD |
| 10.0 | = 10.0 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 8.2 | = 8.2 | no fix published | NVD |
| 8.4 | = 8.4 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 4.0 | = 4.0 | no fix published | NVD |
| 4.16 | = 4.16 | no fix published | NVD |
4 more products in the sources.
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Packages
- libarchiveAlmaLinux:10all versions · fixed in 3.7.7-8.el10_1and 2 other packages
- libarchiveAlmaLinux:9all versions · fixed in 3.5.3-9.el9_7and 2 other packages
- libarchiveAlmaLinux:8all versions · fixed in 3.3.3-7.el8_10and 2 other packages
Vendor advisories
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.17.2
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.18.2
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.20.1
Red Hat Security Advisory: A Subscription Management tool for finding and reporting Red Hat product usage
Red Hat Security Advisory: Red Hat Update Infrastructure 5.2 Technology Preview security update
Red Hat Security Advisory: Red Hat Update Infrastructure 5.1 security update
Fix
- Vendor fix Red Hat Product Security RHSA-2026:82888 · 1 productBefore applying this update, make sure all previously released errata relevant to your system have been applied. The steps to apply the upgraded images are different depending on the installation plan approval policy you used when installing the cert-manager Operator for Red Hat OpenShift. - If t…
- Vendor fix Red Hat Product Security RHSA-2026:14937 · 4 productsThe containers required to run Discovery can be installed through discovery-installer RPM. See the official documentation for more details.
- Vendor fix Red Hat Product Security RHSA-2026:11768 · 3 productsPlease consult the RHUI Technology Preview Release Notes at https://access.redhat.com/articles/7141172 for instructions on how to use this image set.
- Vendor fix Red Hat Product Security RHSA-2026:10065 · 4 productsThe container images provided by this release, apart from the installer, should be deployed using rhui-installer utility. See the official documentation for more details.
- Workaround from the vendor Red Hat Product Security RHSA-2026:82888 · 1 productMitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Published
- 2026-03-19
- Last Modified
- 2026-10-14
- NVD status
- Modified
Frequently asked questions
What is CVE-2026-4424?
Is CVE-2026-4424 actively exploited?
What is the CVSS score for CVE-2026-4424?
Running Red Hat Update Infrastructure? Hear about its next vulnerability
Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».
No credit card required · No monthly cap on website lookups · 250 API requests/month
Go further
- Following what attackers exploit right now? The CISA KEV additions of the month, with their patch deadlines.
- Running this software? Vulnerability monitoring alerts you to new vulnerabilities in your products.
Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.
- CVE-2022-36227same product
- CVE-2022-26280same product
- CVE-2026-5121same product
- CVE-2026-14164same product
- CVE-2026-4111same product
- CVE-2025-5914same productLibarchive: double free at archive_read_format_rar_seek_data() in archive_read_support_format_rar.c
- CVE-2021-23177same product
- CVE-2021-31566same product