Libarchive: infinite loop denial of service in rar5 decompression via archive_read_data() in libarchive
A flaw was identified in the RAR5 archive decompression logic of the libarchive library, specifically within the archive_read_data() processing path. When a specially crafted RAR5 archive is processed, the decompression routine may enter a state where internal logic prevents forward progress. This condition results in an infinite loop that continuously consumes CPU resources. Because the archive passes checksum validation and appears structurally valid, affected applications cannot detect the issue before processing. This can allow attackers to cause persistent denial-of-service conditions in services that automatically process archives.
Noroxi analysis
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We use this product, ask for help- Published
- Mar 13, 2026
- Updated
- Sep 1, 2026
- EPSS
- 0.9% · 58th percentile
- CWE
- CWE-835
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Report tools
Action score
30
Monitor
Low priority for now.
- CVSS
- 30 / 40 · 7.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.9%
CISA SSVC decision
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- —
- CNA · redhat
- 7.5
- NVD has not scored this yet; the score shown is the CNA’s.
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| enterprise linux | 10.1 | cpe:2.3:redhat:enterprise_linux:10.1 |
| enterprise linux eus | 10.0 | cpe:2.3:redhat:enterprise_linux_eus:10.0 |
| enterprise linux | 9 | cpe:2.3:redhat:enterprise_linux:9 |
| rhel e4s | 9.0 | cpe:2.3:redhat:rhel_e4s:9.0 |
| rhel e4s | 9.2 | cpe:2.3:redhat:rhel_e4s:9.2 |
| rhel eus | 9.4 | cpe:2.3:redhat:rhel_eus:9.4 |
| rhel eus | 9.6 | cpe:2.3:redhat:rhel_eus:9.6 |
| openshift | 4.13 | cpe:2.3:redhat:openshift:4.13 |
| openshift | 4.14 | cpe:2.3:redhat:openshift:4.14 |
| openshift | 4.15 | cpe:2.3:redhat:openshift:4.15 |
| openshift | 4.16 | cpe:2.3:redhat:openshift:4.16 |
| openshift | 4.17 | cpe:2.3:redhat:openshift:4.17 |
and 11 more
Versions reported by the vendor
Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.
Red Hat Red Hat AI Inference Server 3.2
- 1780681984 and laternot affected · rpm
- 1775740563 and laternot affected · rpm
Red Hat Red Hat AI Inference Server 3.3
- 1778244559 and laternot affected · rpm
- 1778244531 and laternot affected · rpm
- 1778244546 and laternot affected · rpm
- 1775680192 and laternot affected · rpm
- 1775680262 and laternot affected · rpm
- 1775749857 and laternot affected · rpm
Red Hat Red Hat Discovery 2
- 1775668717 and laternot affected · rpm
- 1775675922 and laternot affected · rpm
Red Hat Red Hat Enterprise Linux 10
- 0:3.7.7-5.el10_1 and laternot affected · rpm
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support
- 0:3.7.7-5.el10_0 and laternot affected · rpm
Red Hat Red Hat Enterprise Linux 6
- all versionsunknown
Red Hat Red Hat Enterprise Linux 7
- all versionsunknown
Red Hat Red Hat Enterprise Linux 8
- all versionsunknown
Red Hat Red Hat Enterprise Linux 9
- 0:3.5.3-7.el9_7 and laternot affected · rpm
- 0:3.5.3-7.el9_7 and laternot affected · rpm
Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions
- 0:3.5.3-2.el9_0.3 and laternot affected · rpm
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
- 0:3.5.3-5.el9_2.1 and laternot affected · rpm
Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support
- 0:3.5.3-4.el9_4.2 and laternot affected · rpm
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:10 | bsdtar | before 3.7.7-5.el10_1 | 3.7.7-5.el10_1 |
| AlmaLinux:10 | libarchive | before 3.7.7-5.el10_1 | 3.7.7-5.el10_1 |
| AlmaLinux:10 | libarchive-devel | before 3.7.7-5.el10_1 | 3.7.7-5.el10_1 |
| AlmaLinux:9 | bsdtar | before 3.5.3-7.el9_7 | 3.5.3-7.el9_7 |
| AlmaLinux:9 | libarchive | before 3.5.3-7.el9_7 | 3.5.3-7.el9_7 |
| AlmaLinux:9 | libarchive-devel | before 3.5.3-7.el9_7 | 3.5.3-7.el9_7 |
| Debian:12 | libarchive | before 3.6.2-1+deb12u4 | 3.6.2-1+deb12u4 |
| Debian:13 | libarchive | before 3.7.4-4+deb13u1 | 3.7.4-4+deb13u1 |
| Debian:14 | libarchive | before 3.8.6-1 | 3.8.6-1 |
| Red Hat:enterprise_linux_eus:10.0 | bsdcat-debuginfo | before 0:3.7.7-5.el10_0 | 0:3.7.7-5.el10_0 |
| Red Hat:enterprise_linux_eus:10.0 | bsdcpio-debuginfo | before 0:3.7.7-5.el10_0 | 0:3.7.7-5.el10_0 |
| Red Hat:enterprise_linux_eus:10.0 | bsdtar | before 0:3.7.7-5.el10_0 | 0:3.7.7-5.el10_0 |
| Red Hat:enterprise_linux_eus:10.0 | bsdtar-debuginfo | before 0:3.7.7-5.el10_0 | 0:3.7.7-5.el10_0 |
| Red Hat:enterprise_linux_eus:10.0 | bsdunzip-debuginfo | before 0:3.7.7-5.el10_0 | 0:3.7.7-5.el10_0 |
| Red Hat:enterprise_linux_eus:10.0 | libarchive | before 0:3.7.7-5.el10_0 | 0:3.7.7-5.el10_0 |
| Red Hat:enterprise_linux_eus:10.0 | libarchive-debuginfo | before 0:3.7.7-5.el10_0 | 0:3.7.7-5.el10_0 |
| Red Hat:enterprise_linux_eus:10.0 | libarchive-debugsource | before 0:3.7.7-5.el10_0 | 0:3.7.7-5.el10_0 |
| Red Hat:enterprise_linux_eus:10.0 | libarchive-devel | before 0:3.7.7-5.el10_0 | 0:3.7.7-5.el10_0 |
| Red Hat:enterprise_linux:10.1 | bsdcat-debuginfo | before 0:3.7.7-5.el10_1 | 0:3.7.7-5.el10_1 |
| Red Hat:enterprise_linux:10.1 | bsdcpio-debuginfo | before 0:3.7.7-5.el10_1 | 0:3.7.7-5.el10_1 |
| Red Hat:enterprise_linux:10.1 | bsdtar | before 0:3.7.7-5.el10_1 | 0:3.7.7-5.el10_1 |
| Red Hat:enterprise_linux:10.1 | bsdtar-debuginfo | before 0:3.7.7-5.el10_1 | 0:3.7.7-5.el10_1 |
| Red Hat:enterprise_linux:10.1 | bsdunzip-debuginfo | before 0:3.7.7-5.el10_1 | 0:3.7.7-5.el10_1 |
| Red Hat:enterprise_linux:10.1 | libarchive | before 0:3.7.7-5.el10_1 | 0:3.7.7-5.el10_1 |
+49
Same product
red hat: all recordsOther highest-scoring records for the same primary product.
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- CVE-2025-7493Freeipa: idm: privilege escalation from host to domain admin in freeipa36Monitor
- CVE-2025-49796Libxml: type confusion leads to denial of service (dos)36Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| almalinux:bsdtar | 3.7.7-5.el10_1 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:libarchive | 3.7.7-5.el10_1 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:libarchive-devel | 3.7.7-5.el10_1 · AlmaLinux:10 | Package registry (OSV) |
| debian:libarchive | 3.6.2-1+deb12u4 · Debian:12 | Package registry (OSV) |
| red hat:bsdcat | 0:3.8.7-1.hum1 · Red Hat:hummingbird:1 | Package registry (OSV) |
| red hat:bsdcat-debuginfo | 0:3.7.7-5.el10_1 · Red Hat:enterprise_linux:10.1 | Package registry (OSV) |
| red hat:bsdcpio-debuginfo | 0:3.7.7-5.el10_1 · Red Hat:enterprise_linux:10.1 | Package registry (OSV) |
| red hat:bsdtar | 0:3.7.7-5.el10_1 · Red Hat:enterprise_linux:10.1 | Package registry (OSV) |
| red hat:bsdtar-debuginfo | 0:3.7.7-5.el10_1 · Red Hat:enterprise_linux:10.1 | Package registry (OSV) |
| red hat:bsdunzip-debuginfo | 0:3.7.7-5.el10_1 · Red Hat:enterprise_linux:10.1 | Package registry (OSV) |
| red hat:libarchive | 0:3.7.7-5.el10_1 · Red Hat:enterprise_linux:10.1 | Package registry (OSV) |
| red hat:libarchive-debuginfo | 0:3.7.7-5.el10_1 · Red Hat:enterprise_linux:10.1 | Package registry (OSV) |
| red hat:libarchive-debugsource | 0:3.7.7-5.el10_1 · Red Hat:enterprise_linux:10.1 | Package registry (OSV) |
| red hat:libarchive-devel | 0:3.7.7-5.el10_1 · Red Hat:enterprise_linux:10.1 | Package registry (OSV) |
| rocky linux:libarchive | 0:3.7.7-5.el10_1 · Rocky Linux:10 | Package registry (OSV) |
| suse:libarchive | 3.6.2-6.1 · SUSE:Linux Micro 6.0 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
- CVE-2026-64611132 days apartLibcupsfilters: cups-filters: libcupsfilters: cpu exhaustion via infinite loop in cfieee1284normalizemakemodel()30Monitor
- CVE-2026-14258110 days apartDhcpcd: dhcpcd infinite loop and out-of-bounds read via zero-length ipv6 nd option in router advertisement handling26Monitor
- CVE-2023-2593226 days apartKernel: ksmbd memory exhaustion denial-of-service vulnerability23Monitor
- CVE-2026-1002876 days apartGlib-networking: infinite loop in glib-networking gnutls backend allows remote denial of service via circular certificate chain17Monitor
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-835 · Loop with Unreachable Exit Condition ('Infinite Loop')CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvd-secondary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- access.redhat.com/errata/RHSA-2026:10065
- access.redhat.com/errata/RHSA-2026:10081
- access.redhat.com/errata/RHSA-2026:10097
- access.redhat.com/errata/RHSA-2026:14773
- access.redhat.com/errata/RHSA-2026:15087
- access.redhat.com/errata/RHSA-2026:16008
- access.redhat.com/errata/RHSA-2026:16009
- access.redhat.com/errata/RHSA-2026:16174
- access.redhat.com/errata/RHSA-2026:17596
- access.redhat.com/errata/RHSA-2026:25096
- access.redhat.com/errata/RHSA-2026:5063
- access.redhat.com/errata/RHSA-2026:5080
- access.redhat.com/errata/RHSA-2026:6647
- access.redhat.com/errata/RHSA-2026:7093
- access.redhat.com/errata/RHSA-2026:7105
- access.redhat.com/errata/RHSA-2026:7106
- access.redhat.com/errata/RHSA-2026:7239
- access.redhat.com/errata/RHSA-2026:7329
- access.redhat.com/errata/RHSA-2026:7335
- access.redhat.com/errata/RHSA-2026:8423
Vendor advisories and official records. Exploit/PoC links are deliberately left out.