Buffer Access with Incorrect Length Value Affecting rv package, versions *


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.02% (5th percentile)

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  • Snyk IDSNYK-RHEL10-RV-16441402
  • published7 May 2026
  • disclosed5 May 2026

Introduced: 5 May 2026

NewCVE-2026-43070  (opens in a new tab)
CWE-805  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:10 rv.

NVD Description

Note: Versions mentioned in the description apply only to the upstream rv package and not the rv package as distributed by RHEL. See How to fix? for RHEL:10 relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

bpf: Reset register ID for BPF_END value tracking

When a register undergoes a BPF_END (byte swap) operation, its scalar value is mutated in-place. If this register previously shared a scalar ID with another register (e.g., after an r1 = r0 assignment), this tie must be broken.

Currently, the verifier misses resetting dst_reg->id to 0 for BPF_END. Consequently, if a conditional jump checks the swapped register, the verifier incorrectly propagates the learned bounds to the linked register, leading to false confidence in the linked register's value and potentially allowing out-of-bounds memory accesses.

Fix this by explicitly resetting dst_reg->id to 0 in the BPF_END case to break the scalar tie, similar to how BPF_NEG handles it via __mark_reg_known.

CVSS Base Scores

version 3.1