High severity · published May 26, 2021
CVE-2020-25669
A vulnerability was found in the Linux Kernel where the function sunkbd_reinit having been scheduled by sunkbd_interrupt before sunkbd being freed
7.8
CVSS
0.6%
EPSS
No
On KEV
Description
A vulnerability was found in the Linux Kernel where the function sunkbd_reinit having been scheduled by sunkbd_interrupt before sunkbd being freed. Though the dangling pointer is set to NULL in sunkbd_disconnect, there is still an alias in sunkbd_reinit causing Use After Free.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 50% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
before 4.4.245; 4.5 before 4.9.245; 4.10 before 4.14.208; 4.15 before 4.19.159; 4.20 before 5.4.79; 5.5 before 5.9.10 · source: NVD
CB
Cloud Backup · Netapp
All versions, or not specified · source: NVD
DL
Debian Linux · Debian
9.0 · source: NVD
HF
H300e Firmware · Netapp
All versions, or not specified · source: NVD
HF
H300s Firmware · Netapp
All versions, or not specified · source: NVD
HF
H410c Firmware · Netapp
All versions, or not specified · source: NVD
HF
H410s Firmware · Netapp
All versions, or not specified · source: NVD
HF
H500e Firmware · Netapp
All versions, or not specified · source: NVD
HF
H500s Firmware · Netapp
All versions, or not specified · source: NVD
HF
H700e Firmware · Netapp
All versions, or not specified · source: NVD
HF
H700s Firmware · Netapp
All versions, or not specified · source: NVD
SH
Solidfire & Hci Management Node · Netapp
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-25669
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-25669
Exploit
http://www.openwall.com/lists/oss-security/2020/11/05/2
Exploit
http://www.openwall.com/lists/oss-security/2020/11/20/5
Patch
https://github.com/torvalds/linux/commit/77e70d351db7de07a46ac49b87a6c3c7a60fca7e
Mailing List
https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html
Mailing List
https://lists.debian.org/debian-lts-announce/2020/12/msg00027.html
Third Party Advisory
https://security.netapp.com/advisory/ntap-20210702-0006/
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