PatchTheCVECVE-2021-31795: The PowerVR GPU kernel driver in pvrsrvkm.ko through 2021-04-24 for the Linux kernel, as used on Alcatel 1S ph
CVE-2021-31795 is a high-severity flaw (CVSS 7.0) affecting pvrsrvkm.ko. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
The PowerVR GPU kernel driver in pvrsrvkm.ko through 2021-04-24 for the Linux kernel, as used on Alcatel 1S phones, allows attackers to overwrite heap memory via PhysmemNewRamBackedPMR.
Why this priority
- High severity
- Public exploit reference
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.0 (High) |
| Attack vector | Local |
| Attack complexity | High |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.4% (top 70%) |
| CISA exploited list | No |
| Weakness | CWE-787 |
| Published | 2021-04-24 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2021-31795?
pvrsrvkm.ko: upgrade to newer than 2021-04-24. Exact commands for each OS are on this page.
Is CVE-2021-31795 being exploited?
CVE-2021-31795 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2021-31795 affect?
CVE-2021-31795 affects pvrsrvkm.ko. Severity is high (CVSS 7.0). The PowerVR GPU kernel driver in pvrsrvkm.ko through 2021-04-24 for the Linux kernel, as used on Alcatel 1S phones, allows attackers to overwrite heap memory via PhysmemNewRamBackedPMR.
How urgent is CVE-2021-31795?
Priority 42/100. High severity; Public exploit reference; On your watchlist