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CVE-2026-93147

s390/bpf: Replace ly instruction with llgf

HIGH
7.8
CVSS Score
Published: September 17, 2026 at 04:11 PM UTC
Updated: October 19, 2026 at 10:17 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH7.8
Exploit prediction
EPSS 0.2%

Description

In the Linux kernel, the following vulnerability has been resolved: s390/bpf: Replace ly instruction with llgf cpu_nr is a 32 bit value and BPF_REG_0 is a 64 bit register, when ly loads the cpu_nr into BPF_REG_0 it does not zero the upper bits, but llgf does.

Affected

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

Linux Kernel· Linux
90%
7.29012cf2491e3c5d28d098b0d6da804af82977032
Vendor states this is fixed in 5f6cc299938b561cb01e343bab7042611fcee12a (fixed)
Vendor states this is fixed in 88500a86ab79f01c568de6ed00f5b1c5c79f11d5 (fixed)
Vendor states this is fixed in 7.2 (unaffected)
Vendor states this is fixed in 7.2.6 (unaffected)
Vendor states this is fixed in 7.3 (unaffected)
Vendor states this is fixed in 7.3-rc1 (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.

References (2)

Source: cverecord
https://git.kernel.org/stable/c/88500a86ab79f01c568de6ed00f5b1c5c79f11d5
Source: cverecord
https://git.kernel.org/stable/c/5f6cc299938b561cb01e343bab7042611fcee12a

CVSS

7.8HIGHLinux
Vector?

Quick Info

StatusRECEIVED

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