Buffer overflow in the util_path_encode function in udev/lib/libudev-util.c in udev before 1.4.1 allows local users to cause a denial of ser
Buffer overflow in the util_path_encode function in udev/lib/libudev-util.c in udev before 1.4.1 allows local users to cause a denial of service (service outage) via vectors that trigger a call with crafted arguments.
- Published
- Apr 17, 2009
- Updated
- Jun 16, 2026
- EPSS
- 0.5% · 44th percentile
- CWE
- CWE-120
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Report tools
Action score
8
Monitor
Low priority for now.
- CVSS
- 8 / 40 · 2.1 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.5%
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected systems
| Vendor | Product | CPE |
|---|---|---|
| udev project | udev | cpe:2.3:a:udev_project:udev |
| suse | linux enterprise debuginfo | cpe:2.3:a:suse:linux_enterprise_debuginfo |
| opensuse | opensuse | cpe:2.3:o:opensuse:opensuse |
| suse | linux enterprise desktop | cpe:2.3:o:suse:linux_enterprise_desktop |
| suse | linux enterprise server | cpe:2.3:o:suse:linux_enterprise_server |
| debian | debian linux | cpe:2.3:o:debian:debian_linux |
| canonical | ubuntu linux | cpe:2.3:o:canonical:ubuntu_linux |
| fedoraproject | fedora | cpe:2.3:o:fedoraproject:fedora |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- canonical ubuntu linux6.06
- canonical ubuntu linux7.10
- canonical ubuntu linux8.04
- canonical ubuntu linux8.10
- debian debian linux4.0
- debian debian linux5.0
- fedoraproject fedora10
- fedoraproject fedora9
- opensuse opensuse10.3
- opensuse opensuse11.0
- opensuse opensuse11.1
- suse linux enterprise debuginfo10
- suse linux enterprise debuginfo11
- suse linux enterprise desktop10
- suse linux enterprise desktop11
- suse linux enterprise server10
- suse linux enterprise server11
- udev project udevbefore 141
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:4.0 | udev | before 0.105-4etch1 | 0.105-4etch1 |
| Debian:5.0 | udev | before 0.125-7+lenny1 | 0.125-7+lenny1 |
Same product
udev project: all recordsOther highest-scoring records for the same primary product.
- CVE-2009-1185udev before 1.4.1 does not verify whether a NETLINK message originates from kernel space, which allows local users to gain privileges by sen52Plan
- CVE-2011-0640The default configuration of udev on Linux does not warn the user before enabling additional Human Interface Device (HID) functionality over27Monitor
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 |
|---|---|---|
| debian:udev | 0.105-4etch1 · Debian:4.0 | 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.
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
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- P · the service can be disrupted
- Attack complexity
- Low
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- P
Weakness class (CWE)
CWE-120 · Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')CVSS vector
AV:L/AC:L/Au:N/C:N/I:N/A:P
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
- git.kernel.org/?p=linux/hotplug/udev.git%3Ba=commitdiff%3Bh=662c3110803bd8c1aedacc36788e6fd028944314
- lists.opensuse.org/opensuse-security-announce/2009-04/msg00006.html
- secunia.com/advisories/34731
- secunia.com/advisories/34750
- secunia.com/advisories/34753
- secunia.com/advisories/34771
- secunia.com/advisories/34776
- secunia.com/advisories/34785
- secunia.com/advisories/34787
- secunia.com/advisories/34801
- slackware.com/security/viewer.php?l=slackware-security&y=2009&m=slackware-security.446399
- wiki.rpath.com/Advisories:rPSA-2009-0063
- wiki.rpath.com/wiki/Advisories:rPSA-2009-0063
- www.debian.org/security/2009/dsa-1772
- www.gentoo.org/security/en/glsa/glsa-200904-18.xml
- www.mandriva.com/security/advisories?name=MDVSA-2009:103
- www.securityfocus.com/archive/1/502752/100/0/threaded
- www.securityfocus.com/bid/34539
- www.securitytracker.com/id?1022068
- www.ubuntu.com/usn/usn-758-1
Vendor advisories and official records. Exploit/PoC links are deliberately left out.