Low severity · published Nov 28, 2020
CVE-2020-29374
An issue was discovered in the Linux kernel before 5.7.3, related to mm/gup.c and mm/huge_memory.c
3.6
CVSS
0.4%
EPSS
No
On KEV
Description
An issue was discovered in the Linux kernel before 5.7.3, related to mm/gup.c and mm/huge_memory.c. The get_user_pages (aka gup) implementation, when used for a copy-on-write page, does not properly consider the semantics of read operations and therefore can grant unintended write access, aka CID-17839856fd58.
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
Attack vector
Local
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 34% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
before 5.7.3 · source: NVD
5F
500f Firmware · Netapp
All versions, or not specified · source: NVD
AF
A250 Firmware · Netapp
All versions, or not specified · source: NVD
DL
Debian Linux · Debian
9.0; 10.0 · source: NVD
HF
H410c Firmware · Netapp
All versions, or not specified · source: NVD
HC
Hci Compute Node Bios · Netapp
All versions, or not specified · source: NVD
SH
Solidfire & Hci Management Node · Netapp
All versions, or not specified · source: NVD
SH
Solidfire & Hci Storage Node · Netapp
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-29374
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-29374
Exploit
http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.html
Exploit
https://bugs.chromium.org/p/project-zero/issues/detail?id=2045
Release Notes
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.7.3
Patch
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=17839856fd588f4ab6b789f482ed3ffd7c403e1f
Mailing List
https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html
Mailing List
https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html
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