CVE-2021-47016
CVE-2021-47016 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% (13th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2021-33664
- Affected product: Linux Linux Kernel
- Published:
- Last modified:
Description
In the Linux kernel, the following vulnerability has been resolved: m68k: mvme147,mvme16x: Don't wipe PCC timer config bits Don't clear the timer 1 configuration bits when clearing the interrupt flag and counter overflow. As Michael reported, "This results in no timer interrupts being delivered after the first. Initialization then hangs in calibrate_delay as the jiffies counter is not updated." On mvme16x, enable the timer after requesting the irq, consistent with mvme147.
Frequently asked questions
- What is CVE-2021-47016?
- In the Linux kernel, the following vulnerability has been resolved: m68k: mvme147,mvme16x: Don't wipe PCC timer config bits Don't clear the timer 1 configuration bits when clearing the interrupt flag and counter overflow. As Michael reported, "This results in no timer interrupts being delivered after the first. Initialization then hangs in calibrate_delay as the jiffies counter is not updated." On mvme16x, enable the timer after requesting the irq, consistent with mvme147.
- How severe is CVE-2021-47016?
- CVE-2021-47016 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-2021-47016 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-47016?
- CVE-2021-47016 affects Linux Linux Kernel. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-47016?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2021-47016 have an EU (EUVD) identifier?
- Yes. CVE-2021-47016 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-33664.
- When was CVE-2021-47016 published?
- CVE-2021-47016 was published on 2024-02-29 and last updated on 2026-06-17.
References
- https://git.kernel.org/stable/c/1dfb26df15fc7036a74221d43de7427f74293dae
- https://git.kernel.org/stable/c/43262178c043032e7c42d00de44c818ba05f9967
- https://git.kernel.org/stable/c/5d34225169346cab5145978d153b9ce90e9ace21
- https://git.kernel.org/stable/c/73fdeb612d25b5e105c219e05434285a45d23576
- https://git.kernel.org/stable/c/f6a90818a32058fca62cda3a2027a6a2364e1878
Affected products (1)
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
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