CVE-2021-46920
CVE-2021-46920 is a medium-severity vulnerability in Linux Linux Kernel 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
- EU (EUVD) id: EUVD-2021-33568
- Affected product: Linux Linux Kernel
- Published:
- Last modified:
Description
In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: Fix clobbering of SWERR overflow bit on writeback Current code blindly writes over the SWERR and the OVERFLOW bits. Write back the bits actually read instead so the driver avoids clobbering the OVERFLOW bit that comes after the register is read.
Frequently asked questions
- What is CVE-2021-46920?
- In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: Fix clobbering of SWERR overflow bit on writeback Current code blindly writes over the SWERR and the OVERFLOW bits. Write back the bits actually read instead so the driver avoids clobbering the OVERFLOW bit that comes after the register is read.
- How severe is CVE-2021-46920?
- CVE-2021-46920 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 high, and availability none.
- Is CVE-2021-46920 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-2021-46920?
- CVE-2021-46920 affects Linux Linux Kernel. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-46920?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2021-46920 have an EU (EUVD) identifier?
- Yes. CVE-2021-46920 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-33568.
- When was CVE-2021-46920 published?
- CVE-2021-46920 was published on 2024-02-27 and last updated on 2026-06-17.
References
- https://git.kernel.org/stable/c/02981a44a0e402089775416371bd2e0c935685f8
- https://git.kernel.org/stable/c/a5ad12d5d69c63af289a37f05187a0c6fe93553d
- https://git.kernel.org/stable/c/ea941ac294d75d0ace50797aebf0056f6f8f7a7f
Affected products (1)
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
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