CVE-2026-64598

smb/client: Fix error code in smb2_aead_req_alloc()

HIGH
8.8
CVSS Score
Published: August 6, 2026 at 07:13 AM UTC
Updated: October 19, 2026 at 09:17 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH8.8
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: smb/client: Fix error code in smb2_aead_req_alloc() The "*num_sgs" variable is a u32 so "ERR_PTR(*num_sgs)" doesn't work. We would have to do something similar to the previous line where it's cast to int and then long. However, it's simpler to store the return in an int ret variable. This bug would eventually result in a crash when dereference the invalid error pointer.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

6.3d08089f649a0cfb2099c8551ac47eef0cc23fdf2
Vendor states this is fixed in 61f28012e5650c619223decdb7970e0d3162e949 (fixed)
Vendor states this is fixed in a187883cc1dc784a4d32537f5d316f1b7b9ad76f (fixed)
Vendor states this is fixed in a1cc432cb0b0a1f74f98a0db3b94ca880c7947ac (fixed)
Vendor states this is fixed in aa37f5fef78dd11cbf983269da2031e12625c56d (fixed)
Vendor states this is fixed in cad756733dc3985188983f3e2eb77e2927209099 (fixed)
Vendor states this is fixed in 6.12.96 (unaffected)
Vendor states this is fixed in 6.18.39 (unaffected)
Vendor states this is fixed in 6.3 (unaffected)
Vendor states this is fixed in 6.6.145 (unaffected)
Vendor states this is fixed in 7.1.4 (unaffected)
Vendor states this is fixed in 7.2 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHLinux
Vector?

Quick Info

StatusRECEIVED
CWE
CWE-190

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