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Fencer Vulns
medium 4.7

CVE-2022-49576 json

ipv4: Fix data-races around sysctl_fib_multipath_hash_fields.

published 2025-02-26 20 mo ago modified 2026-06-17 4 mo ago also EUVD-2022-54656

cvss
4.7
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 7%
public exploits
0
none known

Summary

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

ipv4: Fix data-races around sysctl_fib_multipath_hash_fields.

While reading sysctl_fib_multipath_hash_fields, it can be changed concurrently. Thus, we need to add READ_ONCE() to its readers.

Patch / fix

  • Linux Linux 5.15.58, 5.18.15, 5.19
  • linux Debian 14, Debian 13, Debian 12 5.18.16-1

debian advisories DEBIAN-CVE-2022-49576

  • linux Ubuntu 22.04 LTS 5.15.0-50.56
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1021.25
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1019.25
  • linux-gke Ubuntu 22.04 LTS 5.15.0-1017.20
  • linux-ibm Ubuntu 22.04 LTS 5.15.0-1015.17
  • linux-kvm Ubuntu 22.04 LTS 5.15.0-1019.23
  • linux-azure Ubuntu 22.04 LTS 5.15.0-1021.26
  • linux-gkeop Ubuntu 22.04 LTS 5.15.0-1004.6

ubuntu advisories UBUNTU-CVE-2022-49576

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-49576 updated cvss 4.7

kernel: ipv4: Fix data-races around sysctl_fib_multipath_hash_fields.

  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more
    affected: workaround, no fix planned “To mitigate this issue, prevent module mlxsw_core from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.”
  • Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +83 more Red Hat Enterprise Linux 10 kernel
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
13 mo ago

Exploit prediction

0.18% chance of exploitation in the next 30 days, higher than 7% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Linux Linux

Classification

Weakness
  • CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.