CVE-2021-34928.8HighCWE-415

CVE-2021-3492: Ubuntu linux kernel shiftfs file system double free vulnerability

Ubuntu · Linux kernel

Vendor fix available · Affected: Ubuntu Linux kernel · Exploitation: possible (1 to 10%)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

1.5%probability of exploitation in the next 30 days

75th percentile

050100

Higher than 75% of scored CVEs

8.8HighCVSS 3.1

LowMediumHighCrit.

DescriptionCVE.org

Shiftfs, an out-of-tree stacking file system included in Ubuntu Linux kernels, did not properly handle faults occurring during copy_from_user() correctly. These could lead to either a double-free situation or memory not being freed at all. An attacker could use this to cause a denial of service (kernel memory exhaustion) or gain privileges via executing arbitrary code. AKA ZDI-CAN-13562.

Affected products1

From the CVE record. A product or version that is not listed is unknown, not unaffected.

Ubuntu · Linux kernelfrom 5.8 kernel before 5.8.0-50.56; from 5.4 kernel before 5.4.0-72.80

On the Atlas

Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.

Open the Atlas

Exploitation: Possible (1 to 10%). EPSS between 1% and 10%.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: Double Free · Memory Corruption
Vendor: Ubuntu
Published: April 2021
Band: Possible (1 to 10%), April 2021

CoverageNo articles yet

No CyberSIXT article names CVE-2021-3492 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.