CVE-2020-29369: An issue was discovered in mm/mmap.c in the Linux kernel before 5.7.11

High severity · published Nov 28, 2020

CVE-2020-29369

An issue was discovered in mm/mmap.c in the Linux kernel before 5.7.11

7.0

CVSS

0.5%

EPSS

On KEV

Description

An issue was discovered in mm/mmap.c in the Linux kernel before 5.7.11. There is a race condition between certain expand functions (expand_downwards and expand_upwards) and page-table free operations from an munmap call, aka CID-246c320a8cfe.

CVSS vector

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

Attack vector

Local

Complexity

High

Privileges

Low

User interaction

None

Confidentiality

High

Integrity

High

Availability

High

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)0.5% · higher than 39% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

Kernel · Linux

4.20 before 5.4.54; 5.5 before 5.7.11 · source: NVD

Hci Compute Node · Netapp

All versions, or not specified · source: NVD

Hci Management Node · Netapp

All versions, or not specified · source: NVD

Hci Storage Node · Netapp

All versions, or not specified · source: NVD

Solidfire · Netapp

All versions, or not specified · source: NVD

Affected product

Kernel

Linux

All Kernel CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2020-29369

CVE.org

https://www.cve.org/CVERecord?id=CVE-2020-29369

Mailing List

http://www.openwall.com/lists/oss-security/2021/02/10/6

Mailing List

http://www.openwall.com/lists/oss-security/2021/02/19/8

Exploit

https://bugs.chromium.org/p/project-zero/issues/detail?id=2056

Release Notes

https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.7.11

Patch

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=246c320a8cfe0b11d81a4af38fa9985ef0cc9a4c

Third Party Advisory

https://security.netapp.com/advisory/ntap-20210115-0001/