How severe is CVE-2021-39545?

CVE-2021-39545 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-39545 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-39545?

CVE-2021-39545 affects Sela Project Sela. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-39545?

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

When was CVE-2021-39545 published?

CVE-2021-39545 was published on 2021-09-20 and last updated on 2026-06-17.

CVE-2021-39545

CVE-2021-39545 is a medium-severity vulnerability in Sela Project Sela with a CVSS 3.x base score of 5.5. 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-476.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-476
Affected product: Sela Project Sela
Published: 2021-09-20
Last modified: 2026-06-17

Description

An issue was discovered in sela through 20200412. A NULL pointer dereference exists in the function rice::RiceDecoder::process() located in rice_decoder.c. It allows an attacker to cause Denial of Service.

Frequently asked questions

What is CVE-2021-39545?: An issue was discovered in sela through 20200412. A NULL pointer dereference exists in the function rice::RiceDecoder::process() located in rice_decoder.c. It allows an attacker to cause Denial of Service.
How severe is CVE-2021-39545?: CVE-2021-39545 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-39545 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-39545?: CVE-2021-39545 affects Sela Project Sela. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-39545?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-39545 published?: CVE-2021-39545 was published on 2021-09-20 and last updated on 2026-06-17.

References

https://github.com/sahaRatul/sela/issues/31

Affected products (1)

cpe:2.3:a:sela_project:sela:*:*:*:*:*:*:*:*

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