Memory leak in the vcard_apdu_new function in card_7816.c in libcacard before 2.5.3 allows local guest OS users to cause a denial of service
Memory leak in the vcard_apdu_new function in card_7816.c in libcacard before 2.5.3 allows local guest OS users to cause a denial of service (host memory consumption) via vectors related to allocating a new APDU object.
- Published
- Mar 15, 2017
- Updated
- Jun 16, 2026
- EPSS
- 0.4% · 36th percentile
- CWE
- CWE-772
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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 · 0.4%
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 |
|---|---|---|
| libcacard project | libcacard | cpe:2.3:a:libcacard_project:libcacard |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- libcacard project libcacardbefore 2.5.3
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | libcacard | before 1:2.5.0-3 | 1:2.5.0-3 |
| Red Hat:openstack:10::el7 | qemu-img-rhev | before 10:2.9.0-10.el7 | 10:2.9.0-10.el7 |
| Red Hat:openstack:10::el7 | qemu-kvm-common-rhev | before 10:2.9.0-10.el7 | 10:2.9.0-10.el7 |
| Red Hat:openstack:10::el7 | qemu-kvm-rhev | before 10:2.9.0-10.el7 | 10:2.9.0-10.el7 |
| Red Hat:openstack:10::el7 | qemu-kvm-rhev-debuginfo | before 10:2.9.0-10.el7 | 10:2.9.0-10.el7 |
| Red Hat:openstack:10::el7 | qemu-kvm-tools-rhev | before 10:2.9.0-10.el7 | 10:2.9.0-10.el7 |
| SUSE:Linux Enterprise Desktop 12 SP1 | xen | before 4.5.5_10-22.14.1 | 4.5.5_10-22.14.1 |
| SUSE:Linux Enterprise Server for SAP Applications 12 | xen | before 4.4.4_16-22.36.1 | 4.4.4_16-22.36.1 |
| SUSE:Linux Enterprise Software Development Kit 11 SP4 | xen | before 4.4.4_16-54.1 | 4.4.4_16-54.1 |
| SUSE:OpenStack Cloud 5 | xen | before 4.2.5_21-38.1 | 4.2.5_21-38.1 |
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:libcacard | 1:2.5.0-3 · Debian:12 | Package registry (OSV) |
| red hat:qemu-img-rhev | 10:2.9.0-10.el7 · Red Hat:openstack:10::el7 | Package registry (OSV) |
| red hat:qemu-kvm-common-rhev | 10:2.9.0-10.el7 · Red Hat:openstack:10::el7 | Package registry (OSV) |
| red hat:qemu-kvm-rhev | 10:2.9.0-10.el7 · Red Hat:openstack:10::el7 | Package registry (OSV) |
| red hat:qemu-kvm-rhev-debuginfo | 10:2.9.0-10.el7 · Red Hat:openstack:10::el7 | Package registry (OSV) |
| red hat:qemu-kvm-tools-rhev | 10:2.9.0-10.el7 · Red Hat:openstack:10::el7 | Package registry (OSV) |
| suse:xen | 4.2.5_21-38.1 · SUSE:OpenStack Cloud 5 | 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.
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
- Someone with local access to the system can trigger it.
- A low-privileged account is enough.
- 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
Impact can extend beyond the vulnerable component (scope changes).
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Changed
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-772 · Missing Release of Resource after Effective LifetimeCVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
nvd-primary
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)
ATT&CK techniques
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- www.openwall.com/lists/oss-security/2017/03/01/11
- www.securityfocus.com/bid/96541
- access.redhat.com/errata/RHSA-2017:2408
- bugzilla.redhat.com/show_bug.cgi?id=1427833
- cgit.freedesktop.org/spice/libcacard/commit/?id=9113dc6a303604a2d9812ac70c17d076ef11886c
- cgit.freedesktop.org/spice/libcacard/tree/NEWS?id=aaa5251791bf0b1640afcba77a7d79ea23c42d53
Vendor advisories and official records. Exploit/PoC links are deliberately left out.