How severe is CVE-2022-34640?

CVE-2022-34640 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2022-34640 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-34640?

CVE-2022-34640 affects Openhwgroup Cva6. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-34640?

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

When was CVE-2022-34640 published?

CVE-2022-34640 was published on 2022-07-18 and last updated on 2026-06-17.

CVE-2022-34640

CVE-2022-34640 is a medium-severity vulnerability in Openhwgroup Cva6 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.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
EPSS exploit prediction: 0% (12th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Openhwgroup Cva6
Published: 2022-07-18
Last modified: 2026-06-17

Description

The *tval of ecall/ebreak in CVA6 commit d315ddd0f1be27c1b3f27eb0b8daf471a952299a was discovered to be incorrect.

Frequently asked questions

What is CVE-2022-34640?: The *tval of ecall/ebreak in CVA6 commit d315ddd0f1be27c1b3f27eb0b8daf471a952299a was discovered to be incorrect.
How severe is CVE-2022-34640?: CVE-2022-34640 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2022-34640 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-34640?: CVE-2022-34640 affects Openhwgroup Cva6. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-34640?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2022-34640 published?: CVE-2022-34640 was published on 2022-07-18 and last updated on 2026-06-17.

References

https://github.com/openhwgroup/cva6/issues/898

Affected products (1)

cpe:2.3:a:openhwgroup:cva6:-:*:*:*:*:*:*:*

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CVE-2022-34635 — Critical (CVSS 9.8): The mstatus.sd field in CVA6 commit d315ddd0f1be27c1b3f27eb0b8daf471a952299a does not update when the mstatus.fs field…
CVE-2022-33023 — High (CVSS 7.5): CVA6 commit 909d85a gives incorrect permission to use special multiplication units when the format of instructions is…
CVE-2022-33021 — High (CVSS 7.5): CVA6 commit 909d85a accesses invalid memory when reading the value of MHPMCOUNTER30.
CVE-2022-34641 — Medium (CVSS 5.5): CVA6 commit d315ddd0f1be27c1b3f27eb0b8daf471a952299a and RISCV-Boom commit ad64c5419151e5e886daee7084d8399713b46b4b…
CVE-2022-34639 — Medium (CVSS 5.5): CVA6 commit d315ddd0f1be27c1b3f27eb0b8daf471a952299a treats non-standard fence instructions as illegal which can affect…
CVE-2022-34637 — Medium (CVSS 5.5): CVA6 commit d315ddd0f1be27c1b3f27eb0b8daf471a952299a implements an incorrect exception type when an illegal virtual…

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