What’s Vulnerable › Vulnerabilities

CVE-2019-15918

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-09-04 · updated 2026-06-17
• Weakness: CWE-125

Description

An issue was discovered in the Linux kernel before 5.0.10. SMB2_negotiate in fs/cifs/smb2pdu.c has an out-of-bounds read because data structures are incompletely updated after a change from smb30 to smb21.

Affected products

• Canonical Ubuntu Linux: 14.04, 16.04, 18.04
• Linux kernel: from 4.13.5 before 4.14.166; from 4.15 before 4.19.73; from 4.20 before 5.0.10 — fixed in 4.14.166, 4.19.73, 5.0.10

How to fix

Upgrade to a fixed version: Linux kernel 4.14.166, 4.19.73, 5.0.10. Check the vendor advisory for mitigations.

References

• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.10
• https://github.com/torvalds/linux/commit/b57a55e2200ede754e4dc9cce4ba9402544b9365
• https://security.netapp.com/advisory/ntap-20191004-0001/
• https://usn.ubuntu.com/4162-1/
• https://usn.ubuntu.com/4162-2/
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.10
• https://github.com/torvalds/linux/commit/b57a55e2200ede754e4dc9cce4ba9402544b9365
• https://security.netapp.com/advisory/ntap-20191004-0001/
• https://usn.ubuntu.com/4162-1/
• https://usn.ubuntu.com/4162-2/

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