How severe is CVE-2026-42250?

CVE-2026-42250 has a CVSS 4.0 base score of 4.8, rated medium severity.

Is CVE-2026-42250 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-42250?

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

Does CVE-2026-42250 have an EU (EUVD) identifier?

Yes. CVE-2026-42250 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-32898.

When was CVE-2026-42250 published?

CVE-2026-42250 was published on 2026-05-28 and last updated on 2026-06-17.

CVE-2026-42250

CVE-2026-42250 is a medium-severity vulnerability with a CVSS 4.0 base score of 4.8. 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-787.

Key facts

Severity: Medium (CVSS 4.0 base score 4.8)
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-32898
Weakness: CWE-787
Published: 2026-05-28
Last modified: 2026-06-17

Description

bzip2 contains an off‑by‑one error in the bzip2recover utility. When processing a specially crafted file, the application performs an out‑of‑bounds write to a global buffer, resulting in memory corruption and a crash (denial of service). This issue was fixed in bzip2 patch 35d122a3df8b0cc4082a4d89fdc6ee99f375fe67

Frequently asked questions

What is CVE-2026-42250?: bzip2 contains an off‑by‑one error in the bzip2recover utility. When processing a specially crafted file, the application performs an out‑of‑bounds write to a global buffer, resulting in memory corruption and a crash (denial of service). This issue was fixed in bzip2 patch 35d122a3df8b0cc4082a4d89fdc6ee99f375fe67
How severe is CVE-2026-42250?: CVE-2026-42250 has a CVSS 4.0 base score of 4.8, rated medium severity.
Is CVE-2026-42250 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-42250?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-42250 have an EU (EUVD) identifier?: Yes. CVE-2026-42250 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-32898.
When was CVE-2026-42250 published?: CVE-2026-42250 was published on 2026-05-28 and last updated on 2026-06-17.

References

Other CWE-787 (Out-of-bounds Write) vulnerabilities

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CVE-2024-42479 — Critical (CVSS 10.0): llama.cpp provides LLM inference in C/C++. The unsafe `data` pointer member in the `rpc_tensor` structure can cause…
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