What is CVE-2019-15794?

CVE-2019-15794 is a Medium severity Linux kernel vulnerability with a CVSS score of 6.7 out of 10. CVE-2019-15794 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2019-15794?

CVE-2019-15794 has a CVSS score of 6.7 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2019-15794?

No patch is currently available for CVE-2019-15794. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2019-15794 actively exploited?

CVE-2019-15794 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2019-15794

Medium

Overlayfs in the Linux kernel and shiftfs, a non-upstream patch to the Linux kernel included in the Ubuntu 5.0 and 5.3 kernel series, both replace vma->vm_file in their mmap handlers. On error the original value is not restored, and the reference is put for the file to which vm_file points. On upstream kernels this is not an issue, as no callers dereference vm_file following after call_mmap() returns an error. However, the aufs patchs change mmap_region() to replace the fput() using a local variable with vma_fput(), which will fput() vm_file, leading to a refcount underflow.

Package Linux Kernel

Published 2020-04-24

Last modified 2024-11-21

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

6.7

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Weakness type

CWE-672

CVE-2019-15794 is classified as CWE-672

See CWE-672 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2019-15794 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Ubuntu Security
https://usn.ubuntu.com/usn/usn-4208-1

Third Party Advisory
Ubuntu Security
https://usn.ubuntu.com/usn/usn-4209-1

Third Party Advisory
Kernel patch commit
https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/eoan/commit/?id=270d16ae48a4dbf1c7e25e94cc3e38b4bea37635
Patch
Kernel patch commit
https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/eoan/commit/?id=ef81780548d20a786cc77ed4203fca146fd81ce3
Patch

Details

CVE ID CVE-2019-15794

Severity Medium

CVSS score 6.7 / 10

CVSS version 3.1

Published 2020-04-24

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2019-15794?

CVE-2019-15794 is a Medium severity Linux kernel vulnerability with a CVSS score of 6.7 out of 10 . CVE-2019-15794 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2019-15794?

CVE-2019-15794 has a CVSS score of 6.7 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2019-15794?

No patch is currently available for CVE-2019-15794. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2019-15794 actively exploited?

No — CVE-2019-15794 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.