Security readout for executives and security teams
CVE-2018-20836 is a Linux kernel memory-safety flaw in the libsas SCSI/SAS code before kernel 4.20. The sources describe a race condition that can cause a use-after-free. Business urgency depends on whether affected kernels and SAS-related storage paths are present; the bundle does not provide CVSS, active exploitation, or full impact details. Exposure is most likely on systems running Linux kernels before 4.20 or vendor kernels without the relevant backport, especially where libsas/SAS expander functionality is in use. Appliances or storage products may inherit exposure from embedded Linux kernels, as suggested by F5 and NetApp advisories. Handle through normal kernel security update governance, with higher priority for storage infrastructure and Linux-based appliances. The absence of CVSS and exploitation evidence limits urgency, but kernel use-after-free flaws can carry operational risk if unpatched at scale. Mitigation focus: Update affected Linux kernels using vendor-supported security packages.; Verify vendor kernels include the upstream fix or an equivalent backport.; Prioritize storage-heavy systems and appliances using SAS-related kernel paths..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CVE-2018-20836 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
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CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/torvalds/linux/commit/b90cd6f2b905905fb42671009dc0e27c310a16aeCVE reference · x_refsource_MISC
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b90cd6f2b905905fb42671009dc0e27c310a16aeCVE reference · x_refsource_MISC
- https://support.f5.com/csp/article/K11225249CVE reference · x_refsource_CONFIRM
- https://security.netapp.com/advisory/ntap-20190719-0003/CVE reference · x_refsource_CONFIRM
- USN-4076-1CVE reference · vendor-advisory, x_refsource_UBUNTU
- DSA-4495CVE reference · vendor-advisory, x_refsource_DEBIAN
- 20190812 [SECURITY] [DSA 4495-1] linux security updateCVE reference · mailing-list, x_refsource_BUGTRAQ
- 20190813 [SECURITY] [DSA 4497-1] linux security updateCVE reference · mailing-list, x_refsource_BUGTRAQ
- DSA-4497CVE reference · vendor-advisory, x_refsource_DEBIAN
- [debian-lts-announce] 20190814 [SECURITY] [DLA 1884-1] linux security updateCVE reference · mailing-list, x_refsource_MLIST
- [debian-lts-announce] 20190814 [SECURITY] [DLA 1885-1] linux-4.9 security updateCVE reference · mailing-list, x_refsource_MLIST
Products and packages named in the record
CWE details
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