How severe is CVE-2009-4902?

CVE-2009-4902 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2009-4902 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-4902?

CVE-2009-4902 primarily affects Muscle Pcsc-lite. In total, 35 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-4902?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2009-4902 published?

CVE-2009-4902 was published on 2010-06-18 and last updated on 2026-06-16.

CVE-2009-4902

CVE-2009-4902 is a medium-severity vulnerability in Muscle Pcsc-lite with a CVSS 2.0 base score of 6.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

Severity: Medium (CVSS 2.0 base score 6.8)
EPSS exploit prediction: 0% (30th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Muscle Pcsc-lite
Published: 2010-06-18
Last modified: 2026-06-16

Description

Buffer overflow in the MSGFunctionDemarshall function in winscard_svc.c in the PC/SC Smart Card daemon (aka PCSCD) in MUSCLE PCSC-Lite 1.5.4 and earlier might allow local users to gain privileges via crafted SCARD_CONTROL message data, which is improperly demarshalled. NOTE: this vulnerability exists because of an incorrect fix for CVE-2010-0407.

Frequently asked questions

What is CVE-2009-4902?: Buffer overflow in the MSGFunctionDemarshall function in winscard_svc.c in the PC/SC Smart Card daemon (aka PCSCD) in MUSCLE PCSC-Lite 1.5.4 and earlier might allow local users to gain privileges via crafted SCARD_CONTROL message data, which is improperly demarshalled. NOTE: this vulnerability exists because of an incorrect fix for CVE-2010-0407.
How severe is CVE-2009-4902?: CVE-2009-4902 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2009-4902 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-4902?: CVE-2009-4902 primarily affects Muscle Pcsc-lite. In total, 35 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-4902?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-4902 published?: CVE-2009-4902 was published on 2010-06-18 and last updated on 2026-06-16.

References

Affected products (35)

cpe:2.3:a:muscle:pcsc-lite:*:*:*:*:*:*:*:*
cpe:2.3:a:muscle:pcsc-lite:1.1.2:beta2:*:*:*:*:*:*
cpe:2.3:a:muscle:pcsc-lite:1.1.2:beta3:*:*:*:*:*:*
cpe:2.3:a:muscle:pcsc-lite:1.1.2:beta4:*:*:*:*:*:*
cpe:2.3:a:muscle:pcsc-lite:1.1.2:beta5:*:*:*:*:*:*
cpe:2.3:a:muscle:pcsc-lite:1.2.0:*:*:*:*:*:*:*
cpe:2.3:a:muscle:pcsc-lite:1.2.0:rc1:*:*:*:*:*:*
cpe:2.3:a:muscle:pcsc-lite:1.2.0:rc2:*:*:*:*:*:*
cpe:2.3:a:muscle:pcsc-lite:1.2.0:rc3:*:*:*:*:*:*
cpe:2.3:a:muscle:pcsc-lite:1.2.9:beta1:*:*:*:*:*:*
cpe:2.3:a:muscle:pcsc-lite:1.2.9:beta10:*:*:*:*:*:*
cpe:2.3:a:muscle:pcsc-lite:1.2.9:beta2:*:*:*:*:*:*
cpe:2.3:a:muscle:pcsc-lite:1.2.9:beta3:*:*:*:*:*:*
cpe:2.3:a:muscle:pcsc-lite:1.2.9:beta4:*:*:*:*:*:*
cpe:2.3:a:muscle:pcsc-lite:1.2.9:beta5:*:*:*:*:*:*
cpe:2.3:a:muscle:pcsc-lite:1.2.9:beta6:*:*:*:*:*:*
cpe:2.3:a:muscle:pcsc-lite:1.2.9:beta7:*:*:*:*:*:*
cpe:2.3:a:muscle:pcsc-lite:1.2.9:beta8:*:*:*:*:*:*
cpe:2.3:a:muscle:pcsc-lite:1.2.9:beta9:*:*:*:*:*:*
cpe:2.3:a:muscle:pcsc-lite:1.3.0:*:*:*:*:*:*:*
cpe:2.3:a:muscle:pcsc-lite:1.3.1:*:*:*:*:*:*:*
cpe:2.3:a:muscle:pcsc-lite:1.3.2:*:*:*:*:*:*:*
cpe:2.3:a:muscle:pcsc-lite:1.3.3:*:*:*:*:*:*:*
cpe:2.3:a:muscle:pcsc-lite:1.4.0:*:*:*:*:*:*:*
cpe:2.3:a:muscle:pcsc-lite:1.4.1:*:*:*:*:*:*:*
cpe:2.3:a:muscle:pcsc-lite:1.4.2:*:*:*:*:*:*:*
cpe:2.3:a:muscle:pcsc-lite:1.4.3:*:*:*:*:*:*:*
cpe:2.3:a:muscle:pcsc-lite:1.4.4:*:*:*:*:*:*:*
cpe:2.3:a:muscle:pcsc-lite:1.4.99:*:*:*:*:*:*:*
cpe:2.3:a:muscle:pcsc-lite:1.4.100:*:*:*:*:*:*:*
cpe:2.3:a:muscle:pcsc-lite:1.4.101:*:*:*:*:*:*:*
cpe:2.3:a:muscle:pcsc-lite:1.4.102:*:*:*:*:*:*:*
cpe:2.3:a:muscle:pcsc-lite:1.5.0:*:*:*:*:*:*:*
cpe:2.3:a:muscle:pcsc-lite:1.5.1:*:*:*:*:*:*:*
cpe:2.3:a:muscle:pcsc-lite:1.5.2:*:*:*:*:*:*:*

More vulnerabilities in Muscle Pcsc-lite

CVE-2016-10109 — High (CVSS 7.5): Use-after-free vulnerability in pcsc-lite before 1.8.20 allows a remote attackers to cause denial of service (crash)…
CVE-2010-0407 — Medium (CVSS 6.8): Multiple buffer overflows in the MSGFunctionDemarshall function in winscard_svc.c in the PC/SC Smart Card daemon (aka…
CVE-2010-4531 — Medium (CVSS 4.4): Stack-based buffer overflow in the ATRDecodeAtr function in the Answer-to-Reset (ATR) Handler (atrhandler.c) for pcscd…
CVE-2010-4530 — Medium (CVSS 4.4): Signedness error in ccid_serial.c in libccid in the USB Chip/Smart Card Interface Devices (CCID) driver, as used in…
CVE-2009-4901 — Low (CVSS 2.1): The MSGFunctionDemarshall function in winscard_svc.c in the PC/SC Smart Card daemon (aka PCSCD) in MUSCLE PCSC-Lite…

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