CVE-2020-36385

moderate-risk
Published 2021-06-07

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.

Do I need to act?

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0.06% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.8/10 High
LOCAL / LOW complexity

Affected Products (11)

Starwind San \& Nas

Affected Vendors

Linux Netapp Starwindsoftware

References (12)

Release Notes https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10
Patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f5...
Third Party Advisory https://security.netapp.com/advisory/ntap-20210720-0004/
Patch https://sites.google.com/view/syzscope/kasan-use-after-free-read-in-ucma_close-2
Patch https://syzkaller.appspot.com/bug?id=457491c4672d7b52c1007db213d93e47c711fae6
Third Party Advisory https://www.starwindsoftware.com/security/sw-20220802-0002/
Release Notes https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10
Patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f5...
Third Party Advisory https://security.netapp.com/advisory/ntap-20210720-0004/
Patch https://sites.google.com/view/syzscope/kasan-use-after-free-read-in-ucma_close-2
Patch https://syzkaller.appspot.com/bug?id=457491c4672d7b52c1007db213d93e47c711fae6
Third Party Advisory https://www.starwindsoftware.com/security/sw-20220802-0002/
40
/ 100
moderate-risk
Severity 24/34 · High
Exploitability 0/34 · Minimal
Exposure 16/34 · Moderate