CVE-2024-8443

Code execution via unchecked OpenPGP response handling

Published Sep 10, 2024 · Updated Jun 30, 2026

Heap buffer overflow in OpenSC before 0.26.0 allows physically proximate attackers to execute code through crafted smart-card responses. The OpenPGP key parser accepts response tags for a different key algorithm and accesses invalid union members, while the fingerprint writer fails to verify that the selected key slot fits its heap buffer. Exploitation requires a crafted USB token or smart card and user interaction during RSA or ECDSA key generation or card enrollment.

CVSS severity3.4
Low
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer overflow in OpenSC before 0.26.0 allows physically proximate attackers to execute code through crafted smart-card responses. The OpenPGP key parser accepts response tags for a different key algorithm and accesses invalid union members, while the fingerprint writer fails to verify that the selected key slot fits its heap buffer. Exploitation requires a crafted USB token or smart card and user interaction during RSA or ECDSA key generation or card enrollment.

The record

CVE
CVE-2024-8443
Published
Sep 10, 2024
Updated
Jun 30, 2026
Vendor
Red Hat
Product
Red Hat Enterprise Linux 10
Classifications
CWE-787, CWE-122, T1200
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 10, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 30, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

Red Hat · Red Hat Enterprise Linux 10Affected versions are unavailable in this record.
Red Hat · Red Hat Enterprise Linux 8Affected versions are unavailable in this record.
Red Hat · Red Hat Enterprise Linux 7Affected versions are unavailable in this record.
OpenSC Project · OpenSCversion=0.26.0 <0.26.0
Red Hat · Red Hat Enterprise Linux 9Affected versions are unavailable in this record.

Published CVSS scores

3.4Red HatCVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
2.9NISTCVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-122Heap-based Buffer Overflow
T1200Hardware Additions

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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