How severe is CVE-2020-15702?

CVE-2020-15702 has a CVSS 3.x base score of 7.0, rated high severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-15702 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-15702?

CVE-2020-15702 primarily affects Canonical Apport. In total, 101 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-15702?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-15702 published?

CVE-2020-15702 was published on 2020-08-06 and last updated on 2026-06-17.

CVE-2020-15702

CVE-2020-15702 is a high-severity vulnerability in Canonical Apport with a CVSS 3.x base score of 7.0. 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-367.

Key facts

Severity: High (CVSS 3.x base score 7.0)
CVSS v2: 4.4
EPSS exploit prediction: 0% (39th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-367
Affected product: Canonical Apport
Published: 2020-08-06
Last modified: 2026-06-17

Description

TOCTOU Race Condition vulnerability in apport allows a local attacker to escalate privileges and execute arbitrary code. An attacker may exit the crashed process and exploit PID recycling to spawn a root process with the same PID as the crashed process, which can then be used to escalate privileges. Fixed in 2.20.1-0ubuntu2.24, 2.20.9 versions prior to 2.20.9-0ubuntu7.16 and 2.20.11 versions prior to 2.20.11-0ubuntu27.6. Was ZDI-CAN-11234.

Frequently asked questions

What is CVE-2020-15702?: TOCTOU Race Condition vulnerability in apport allows a local attacker to escalate privileges and execute arbitrary code. An attacker may exit the crashed process and exploit PID recycling to spawn a root process with the same PID as the crashed process, which can then be used to escalate privileges. Fixed in 2.20.1-0ubuntu2.24, 2.20.9 versions prior to 2.20.9-0ubuntu7.16 and 2.20.11 versions prior to 2.20.11-0ubuntu27.6. Was ZDI-CAN-11234.
How severe is CVE-2020-15702?: CVE-2020-15702 has a CVSS 3.x base score of 7.0, rated high severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-15702 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-15702?: CVE-2020-15702 primarily affects Canonical Apport. In total, 101 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-15702?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-15702 published?: CVE-2020-15702 was published on 2020-08-06 and last updated on 2026-06-17.

References

Affected products (101)

cpe:2.3:a:canonical:apport:2.20.11-0ubuntu8:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.11-0ubuntu9:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.11-0ubuntu10:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.11-0ubuntu11:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.11-0ubuntu12:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.11-0ubuntu13:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.11-0ubuntu14:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.11-0ubuntu15:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.11-0ubuntu16:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.11-0ubuntu17:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.11-0ubuntu18:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.11-0ubuntu19:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.11-0ubuntu20:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.11-0ubuntu21:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.11-0ubuntu22:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.11-0ubuntu23:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.11-0ubuntu24:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.11-0ubuntu25:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.11-0ubuntu26:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.11-0ubuntu27:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.11-0ubuntu27.2:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.11-0ubuntu27.3:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.11-0ubuntu27.4:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.11-0ubuntu27.5:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.7-0ubuntu3:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.7-0ubuntu3.1:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.7-0ubuntu4:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.8-0ubuntu1:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.8-0ubuntu2:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.8-0ubuntu3:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.8-0ubuntu4:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.8-0ubuntu5:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.8-0ubuntu6:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.8-0ubuntu7:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.8-0ubuntu8:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.8-0ubuntu9:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.8-0ubuntu10:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.9-0ubuntu1:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.9-0ubuntu2:*:*:*:*:*:*:*
cpe:2.3:a:canonical:apport:2.20.9-0ubuntu3:*:*:*:*:*:*:*

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