HOMEVULNERABILITIESCVE-2020-36385
HIGH

CVE-2020-36385

CWE-416Published: June 7, 2021· Updated: Jun 17, 2026

7.8
CVSS v3.1

Official Description

An issue was discovered in the Linux kernel before 5.10. drivers/infiniband/core/ucma.c has a use-after-free because the ctx is reached via the ctx_list in some ucma_migrate_id situations where ucma_close is called, aka CID-f5449e74802c.

NVD Source

Technical Analysis

CVE-2020-36385 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.

From a weakness classification perspective (CWE-416): Use-after-free vulnerabilities involve accessing memory after it has been freed, often enabling arbitrary code execution.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected Vendors & Products

Linux1 product(s)
linux kernel
netapp16 product(s)
h300s firmwareh300sh500s firmwareh500sh700s firmwareh700sh300e firmwareh300eh500e firmwareh500eh700e firmwareh700e+4
starwindsoftware2 product(s)
starwind san \& nasstarwind virtual san
Source: NVD CPE · 19 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f5449e74802c1112dea984aec8af7a33c4516af1
PATCHhttps://sites.google.com/view/syzscope/kasan-use-after-free-read-in-ucma_close-2
PATCHhttps://syzkaller.appspot.com/bug?id=457491c4672d7b52c1007db213d93e47c711fae6
PATCHhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f5449e74802c1112dea984aec8af7a33c4516af1
PATCHhttps://sites.google.com/view/syzscope/kasan-use-after-free-read-in-ucma_close-2
PATCHhttps://syzkaller.appspot.com/bug?id=457491c4672d7b52c1007db213d93e47c711fae6
ADVISORYhttps://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10
ADVISORYhttps://security.netapp.com/advisory/ntap-20210720-0004/
ADVISORYhttps://www.starwindsoftware.com/security/sw-20220802-0002/
ADVISORYhttps://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10
ADVISORYhttps://security.netapp.com/advisory/ntap-20210720-0004/
ADVISORYhttps://www.starwindsoftware.com/security/sw-20220802-0002/

All References (12)

→
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10Release Notes · Vendor Advisory
→
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f5449e74802c1112dea984aec8af7a33c4516af1Patch · Vendor Advisory
→
https://security.netapp.com/advisory/ntap-20210720-0004/Third Party Advisory
→
https://sites.google.com/view/syzscope/kasan-use-after-free-read-in-ucma_close-2Patch · Third Party Advisory
→
https://syzkaller.appspot.com/bug?id=457491c4672d7b52c1007db213d93e47c711fae6Patch · Third Party Advisory
→
https://www.starwindsoftware.com/security/sw-20220802-0002/Third Party Advisory
→
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10Release Notes · Vendor Advisory
→
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f5449e74802c1112dea984aec8af7a33c4516af1Patch · Vendor Advisory
→
https://security.netapp.com/advisory/ntap-20210720-0004/Third Party Advisory
→
https://sites.google.com/view/syzscope/kasan-use-after-free-read-in-ucma_close-2Patch · Third Party Advisory
→
https://syzkaller.appspot.com/bug?id=457491c4672d7b52c1007db213d93e47c711fae6Patch · Third Party Advisory
→
https://www.starwindsoftware.com/security/sw-20220802-0002/Third Party Advisory

Quick Facts

CVE IDCVE-2020-36385
CVSS Score7.8 / 10
SeverityHIGH
WeaknessCWE-416
CISA KEVNo
Affected3 vendor(s)
PublishedJun 7, 2021

Related CVEs (CWE-416)

CVE-2015-5586
10.0
CVE-2012-5140
10.0
CVE-2012-5137
10.0
CVE-2011-0982
10.0
CVE-2012-5139
10.0
CVE-2015-6683
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-36385 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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