CVE-2026-68385Patch

LOWCVSS 9.8 · CRITICAL

Signal is active with 1 mentions in latest observed window

Immediate actions

Patch affected systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

In the Linux kernel, the following vulnerability has been resolved: s390/checksum: Fix csum_partial() without vector facility Currently csum_partial() calls csum_copy() with copy=false and dst=NULL. On machines without the vector facility, csum_copy() falls back to cksm(dst, ...), causing the checksum to be calculated from address zero instead of the source buffer. The VX implementation already checksums data loaded from src. Make the fallback do the same by passing src to cksm().

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0.5/ 10 priority

Sources & remediation

Other references

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Threat summary

Patch or workaround signal is available
1 mentions across 1 observed day

What's happening

Patch or workaround mentioned in 1 signal
Technical details provided in 1 signal
1 total mentions across 1 day

Deep dive

Activity timeline1 mentions / 1d

Signal classification1 categories

Patch

1100.0%

Full discourse1 post

CyberSignal | Cybersecurity News@XQOPTRX46d
Patch
CyberSec Daily ✓ · 🐧 Linux · August 14, 2026 🎯 Linux kernel checksum flaw documented for IBM s390 systems CVE-2026-68385 affects checksum processing on Linux systems using the s390 architecture without the vector facility. The flaw can cause a fallback implementation to calculate a checksum from the wrong memory address. Its scope is specialized rather than affecting ordinary x86 desktops and servers, but administrators operating affected mainframe environments should apply the upstream correction. 🔗 Source: SentinelOne Vulnerability Database #LinuxKernel #S390 #CVE202668385 #MainframeSecurity #Vulnerability
Post summary
The post announces CVE-2026-68385, a checksum flaw in IBM s390 Linux kernels, provides technical details of the issue, and recommends applying an upstream patch. No exploit code or active exploitation is reported.
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