Riskcovery

CVE-2021-47537

octeontx2-af: Fix a memleak bug in rvu_mbox_init()

State
Published
Severity
Not scored
Published
May 24, 2024
Updated
May 11, 2026
Reserved
May 24, 2024

Read the record on cve.org

Description

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

octeontx2-af: Fix a memleak bug in rvu_mbox_init()

In rvu_mbox_init(), mbox_regions is not freed or passed out under the switch-default region, which could lead to a memory leak.

Fix this bug by changing 'return err' to 'goto free_regions'.

This bug was found by a static analyzer. The analysis employs differential checking to identify inconsistent security operations (e.g., checks or kfrees) between two code paths and confirms that the inconsistent operations are not recovered in the current function or the callers, so they constitute bugs.

Note that, as a bug found by static analysis, it can be a false positive or hard to trigger. Multiple researchers have cross-reviewed the bug.

Builds with CONFIG_OCTEONTX2_AF=y show no new warnings, and our static analyzer no longer warns about this code.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 98c5611163603d3d8012b1bf64ab48fd932cf734 to before 1c0ddef45b7e3dbe3ed073695d20faa572b7056aAffected
  • 98c5611163603d3d8012b1bf64ab48fd932cf734 to before e07a097b4986afb8f925d0bb32612e1d3e88ce15Affected
LinuxLinux
  • 5.12Affected
  • before 5.12Not affected
  • 5.15.7 through 5.15.*Not affected
  • 5.16 and laterNot affected

References

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