A vulnerability was found in libguestfs.
Noroxi assessment
Priority: Monitor (action score 26/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 0.97% (FIRST EPSS); higher than 61.2% of all records.
- Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
- Fixed version: guestfs-tools (AlmaLinux:9) 1.48.2-5.el9; libguestfs (AlmaLinux:9) 1:1.48.4-2.el9.alma; libguestfs-appliance (AlmaLinux:9) 1:1.48.4-2.el9.alma.
Low priority for now. Upgrade to guestfs-tools (AlmaLinux:9) 1.48.2-5.el9; libguestfs (AlmaLinux:9) 1:1.48.4-2.el9.alma; libguestfs-appliance (AlmaLinux:9) 1:1.48.4-2.el9.alma or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
A vulnerability was found in libguestfs. This issue occurs while calculating the greatest possible number of matching keys in the get_keys() function. This flaw leads to a denial of service, either by mistake or malicious actor.
- Published
- Jul 12, 2022
- Updated
- Jun 17, 2026
- EPSS
- 0.9% · 61th percentile
- CWE
- CWE-120
Report tools
Action score
26
Monitor
Low priority for now.
- CVSS
- 26 / 40 · 6.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.9%
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| libguestfs | libguestfs | cpe:2.3:a:libguestfs:libguestfs |
| redhat | enterprise linux | cpe:2.3:o:redhat:enterprise_linux |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- libguestfs libguestfsall versions
- redhat enterprise linux8.0
- redhat enterprise linux9.0
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.
n/a libguestfs
- noneaffected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:9 | guestfs-tools | before 1.48.2-5.el9 | 1.48.2-5.el9 |
| AlmaLinux:9 | libguestfs | before 1:1.48.4-2.el9.alma | 1:1.48.4-2.el9.alma |
| AlmaLinux:9 | libguestfs-appliance | before 1:1.48.4-2.el9.alma | 1:1.48.4-2.el9.alma |
| AlmaLinux:9 | libguestfs-bash-completion | before 1:1.48.4-2.el9.alma | 1:1.48.4-2.el9.alma |
| AlmaLinux:9 | libguestfs-devel | before 1:1.48.4-2.el9.alma | 1:1.48.4-2.el9.alma |
| AlmaLinux:9 | libguestfs-gobject | before 1:1.48.4-2.el9.alma | 1:1.48.4-2.el9.alma |
| AlmaLinux:9 | libguestfs-gobject-devel | before 1:1.48.4-2.el9.alma | 1:1.48.4-2.el9.alma |
| AlmaLinux:9 | libguestfs-inspect-icons | before 1:1.48.4-2.el9.alma | 1:1.48.4-2.el9.alma |
| AlmaLinux:9 | libguestfs-man-pages-ja | before 1:1.48.4-2.el9.alma | 1:1.48.4-2.el9.alma |
| AlmaLinux:9 | libguestfs-man-pages-uk | before 1:1.48.4-2.el9.alma | 1:1.48.4-2.el9.alma |
| AlmaLinux:9 | libguestfs-rescue | before 1:1.48.4-2.el9.alma | 1:1.48.4-2.el9.alma |
| AlmaLinux:9 | libguestfs-rsync | before 1:1.48.4-2.el9.alma | 1:1.48.4-2.el9.alma |
| AlmaLinux:9 | libguestfs-xfs | before 1:1.48.4-2.el9.alma | 1:1.48.4-2.el9.alma |
| AlmaLinux:9 | lua-guestfs | before 1:1.48.4-2.el9.alma | 1:1.48.4-2.el9.alma |
| AlmaLinux:9 | ocaml-libguestfs | before 1:1.48.4-2.el9.alma | 1:1.48.4-2.el9.alma |
| AlmaLinux:9 | ocaml-libguestfs-devel | before 1:1.48.4-2.el9.alma | 1:1.48.4-2.el9.alma |
| AlmaLinux:9 | perl-Sys-Guestfs | before 1:1.48.4-2.el9.alma | 1:1.48.4-2.el9.alma |
| AlmaLinux:9 | php-libguestfs | before 1:1.48.4-2.el9.alma | 1:1.48.4-2.el9.alma |
| AlmaLinux:9 | python3-libguestfs | before 1:1.48.4-2.el9.alma | 1:1.48.4-2.el9.alma |
| AlmaLinux:9 | ruby-libguestfs | before 1:1.48.4-2.el9.alma | 1:1.48.4-2.el9.alma |
| AlmaLinux:9 | virt-v2v | before 1:2.0.7-6.el9 | 1:2.0.7-6.el9 |
| AlmaLinux:9 | virt-v2v-bash-completion | before 1:2.0.7-6.el9 | 1:2.0.7-6.el9 |
| AlmaLinux:9 | virt-v2v-man-pages-ja | before 1:2.0.7-6.el9 | 1:2.0.7-6.el9 |
| AlmaLinux:9 | virt-v2v-man-pages-uk | before 1:2.0.7-6.el9 | 1:2.0.7-6.el9 |
+96
Same product
libguestfs: all recordsOther highest-scoring records for the same primary product.
- CVE-2013-4419The guestfish command in libguestfs 1.20.12, 1.22.7, and earlier, when using the --remote or --listen option, does not properly check the ow27Monitor
- CVE-2013-2124Double free vulnerability in inspect-fs.c in LibguestFS 1.20.x before 1.20.7, 1.21.x, 1.22.0, and 1.23.0 allows remote attackers to cause a 18Monitor
- CVE-2010-3851libguestfs before 1.5.23, as used in virt-v2v, virt-inspector 1.5.3 and earlier, and possibly other products, when a raw-format disk image i18Monitor
- CVE-2012-2690virt-edit in libguestfs before 1.18.0 does not preserve the permissions from the original file and saves the new file with world-readable pe8Monitor
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:libguestfs | 1:1.48.4-2.el9.alma · AlmaLinux:9 | Package registry (OSV) |
| almalinux:libguestfs-appliance | 1:1.48.4-2.el9.alma · AlmaLinux:9 | Package registry (OSV) |
| almalinux:libguestfs-bash-completion | 1:1.48.4-2.el9.alma · AlmaLinux:9 | Package registry (OSV) |
| almalinux:libguestfs-devel | 1:1.48.4-2.el9.alma · AlmaLinux:9 | Package registry (OSV) |
| almalinux:libguestfs-gobject | 1:1.48.4-2.el9.alma · AlmaLinux:9 | Package registry (OSV) |
| almalinux:libguestfs-gobject-devel | 1:1.48.4-2.el9.alma · AlmaLinux:9 | Package registry (OSV) |
| almalinux:libguestfs-inspect-icons | 1:1.48.4-2.el9.alma · AlmaLinux:9 | Package registry (OSV) |
| almalinux:libguestfs-man-pages-ja | 1:1.48.4-2.el9.alma · AlmaLinux:9 | Package registry (OSV) |
| almalinux:libguestfs-man-pages-uk | 1:1.48.4-2.el9.alma · AlmaLinux:9 | Package registry (OSV) |
| almalinux:libguestfs-rescue | 1:1.48.4-2.el9.alma · AlmaLinux:9 | Package registry (OSV) |
| almalinux:libguestfs-rsync | 1:1.48.4-2.el9.alma · AlmaLinux:9 | Package registry (OSV) |
| almalinux:libguestfs-xfs | 1:1.48.4-2.el9.alma · AlmaLinux:9 | Package registry (OSV) |
| debian:guestfs-tools | 1.48.2-1+deb12u1 · Debian:12 | Package registry (OSV) |
| debian:libguestfs | 1:1.46.2-1 · Debian:12 | Package registry (OSV) |
| opensuse:libguestfs | 1.44.2-150400.3.3.1 · openSUSE:Leap 15.4 | Package registry (OSV) |
| opensuse:virt-v2v | 1.44.2-150400.3.3.1 · openSUSE:Leap 15.4 | Package registry (OSV) |
| red hat:hivex | 0:1.3.18-23.module+el8.7.0+16689+53d59bc2 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:hivex-debuginfo | 0:1.3.18-23.module+el8.7.0+16689+53d59bc2 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:hivex-debugsource | 0:1.3.18-23.module+el8.7.0+16689+53d59bc2 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:hivex-devel | 0:1.3.18-23.module+el8.7.0+16689+53d59bc2 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:libguestfs | 1:1.44.0-9.module+el8.7.0+16689+53d59bc2 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:libguestfs-appliance | 1:1.44.0-9.module+el8.7.0+16689+53d59bc2 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:libguestfs-bash-completion | 1:1.44.0-9.module+el8.7.0+16689+53d59bc2 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:libguestfs-debuginfo | 1:1.44.0-9.module+el8.7.0+16689+53d59bc2 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:libguestfs-debugsource | 1:1.44.0-9.module+el8.7.0+16689+53d59bc2 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:libguestfs-devel | 1:1.44.0-9.module+el8.7.0+16689+53d59bc2 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:libguestfs-gfs2 | 1:1.44.0-9.module+el8.7.0+16689+53d59bc2 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:SLOF | 0:20210217-1.module+el8.7.0+16689+53d59bc2 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| rocky linux:hivex | 0:1.3.18-23.module+el8.7.0+1084+97b81f61 · Rocky Linux:8 | Package registry (OSV) |
| rocky linux:libguestfs | 1:1.44.0-9.module+el8.7.0+1084+97b81f61.rocky · Rocky Linux:8 | Package registry (OSV) |
+12
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.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
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.
- A user must open a link or visit a page.
- 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
- Required
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-120 · Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
nvd-primary
Root cause
When data is copied, the source length is not compared with the size of the destination buffer. Excess data overwrites adjacent memory.
The bug in code
The whole CWE-120 classA representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.
Vulnerable
char buf[256];memcpy(buf, pkt->data, pkt->len);Fixed
char buf[256];if (pkt->len > sizeof(buf)) { return -EINVAL;}memcpy(buf, pkt->data, pkt->len);Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Buffer Overflow via Environment VariablesCAPEC-10likelihood: High · High
- Overflow BuffersCAPEC-100likelihood: High · Very High
- Client-side Injection-induced Buffer OverflowCAPEC-14likelihood: Medium · High
- Filter Failure through Buffer OverflowCAPEC-24likelihood: High · High
- MIME ConversionCAPEC-42likelihood: High · High
- Overflow Binary Resource FileCAPEC-44likelihood: High · Very High
- Buffer Overflow via Symbolic LinksCAPEC-45likelihood: High · High
- Overflow Variables and TagsCAPEC-46likelihood: High · High
ATT&CK techniques
—
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Vendor advisories and official records. Exploit/PoC links are deliberately left out.