high 7.1

CVE-2022-48757 json

net: fix information leakage in /proc/net/ptype

published 2024-06-20 2 y ago modified 2026-06-17 4 mo ago also EUVD-2022-53636

cvss: 7.1; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 12%
public exploits: 0; none known

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

In one net namespace, after creating a packet socket without binding it to a device, users in other net namespaces can observe the new `packet_type` added by this packet socket by reading `/proc/net/ptype` file. This is minor information leakage as packet socket is namespace aware.

Add a net pointer in `packet_type` to keep the net namespace of of corresponding packet socket. In `ptype_seq_show`, this net pointer must be checked when it is not NULL.

Patch / fix

fixed in 1 distros 5 links 9

Linux Linux 4.4.302, 4.9.300, 4.14.265, 4.19.228, 5.4.176, 5.10.96, 5.15.19, 5.16.5, 5.17

debian ubuntu red hat almalinux rocky linux

linux Debian 14, Debian 13, Debian 12 5.16.7-1

debian advisories DEBIAN-CVE-2022-48757

linux Ubuntu 18.04 LTS 4.15.0-176.185
linux Ubuntu 20.04 LTS 5.4.0-109.123
linux-aws Ubuntu 18.04 LTS 4.15.0-1127.136
linux-aws Ubuntu 20.04 LTS 5.4.0-1072.77
linux-gcp Ubuntu 20.04 LTS 5.4.0-1072.77
linux-ibm Ubuntu 20.04 LTS 5.4.0-1020.22
linux-iot Ubuntu 20.04 LTS 5.4.0-1004.6
linux-kvm Ubuntu 18.04 LTS 4.15.0-1113.116

ubuntu advisories UBUNTU-CVE-2022-48757

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

kernel-rt RHEL 8 4.18.0-553.16.1.rt7.357.el8_10
kernel-rt-kvm RHEL 8 4.18.0-553.16.1.rt7.357.el8_10
kernel-rt-core RHEL 8 4.18.0-553.16.1.rt7.357.el8_10
kernel-rt-modules RHEL 8 4.18.0-553.16.1.rt7.357.el8_10
kernel-rt-debug-kvm RHEL 8 4.18.0-553.16.1.rt7.357.el8_10
kernel-rt-debug-core RHEL 8 4.18.0-553.16.1.rt7.357.el8_10
kernel-rt-debug-modules RHEL 8 4.18.0-553.16.1.rt7.357.el8_10
kernel-rt-modules-extra RHEL 8 4.18.0-553.16.1.rt7.357.el8_10

red hat advisories RHSA-2024:5102 RHSA-2024:5101 RHSA-2024:6206

kernel AlmaLinux 8 4.18.0-553.16.1.el8_10
perf AlmaLinux 8 4.18.0-553.16.1.el8_10
bpftool AlmaLinux 8 4.18.0-553.16.1.el8_10
kernel-core AlmaLinux 8 4.18.0-553.16.1.el8_10
kernel-tools AlmaLinux 8 4.18.0-553.16.1.el8_10
python3-perf AlmaLinux 8 4.18.0-553.16.1.el8_10
kernel-modules AlmaLinux 8 4.18.0-553.16.1.el8_10
kernel-zfcpdump AlmaLinux 8 4.18.0-553.16.1.el8_10

almalinux advisories ALSA-2024:5101 ALSA-2024:5102

kernel Rocky Linux 8 4.18.0-553.16.1.el8_10.cloud.0.1
kernel-rt Rocky Linux 8 4.18.0-553.16.1.rt7.357.el8_10
kernel Rocky Linux 8 4.18.0-553.16.1.el8_10

rocky linux advisories RXSA-2024:5101 RLSA-2024:5102 RLSA-2024:5101

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-2022-48757 updated 2026-11-06 cvss 3.3

kernel: net: fix information leakage in /proc/net/ptype

Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more
affected: no fix planned “Out of support scope”
Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +82 more
affected: no fix available “Fix deferred”
Red Hat CodeReady Linux Builder EUS (v.8.8) kernel-debuginfo-common-x86_64 4.18.0-477.70.1.el8_8, kernel-debuginfo-common-aarch64 4.18.0-477.70.1.el8_8, kernel-debuginfo-common-ppc64le 4.18.0-477.70.1.el8_8
fixed: vendor fix RHSA-2024:6206
Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.16.1.el8_10, kernel 4.18.0-553.16.1.el8_10, bpftool 4.18.0-553.16.1.el8_10, kernel-core 4.18.0-553.16.1.el8_10, kernel-tools 4.18.0-553.16.1.el8_10, python3-perf 4.18.0-553.16.1.el8_10, +15 more
fixed: vendor fix RHSA-2024:5101
Red Hat Enterprise Linux BaseOS EUS (v.8.8) perf 4.18.0-477.70.1.el8_8, kernel 4.18.0-477.70.1.el8_8, bpftool 4.18.0-477.70.1.el8_8, kernel-core 4.18.0-477.70.1.el8_8, kernel-tools 4.18.0-477.70.1.el8_8, python3-perf 4.18.0-477.70.1.el8_8, +15 more
fixed: vendor fix RHSA-2024:6206
Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.16.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.16.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.16.1.el8_10
fixed: vendor fix RHSA-2024:5101
Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.16.1.rt7.357.el8_10, kernel-rt-kvm 4.18.0-553.16.1.rt7.357.el8_10, kernel-rt-core 4.18.0-553.16.1.rt7.357.el8_10, kernel-rt-modules 4.18.0-553.16.1.rt7.357.el8_10, kernel-rt-debug-kvm 4.18.0-553.16.1.rt7.357.el8_10, kernel-rt-debug-core 4.18.0-553.16.1.rt7.357.el8_10, +4 more Red Hat Enterprise Linux RT (v. 8) kernel-rt 4.18.0-553.16.1.rt7.357.el8_10, kernel-rt-core 4.18.0-553.16.1.rt7.357.el8_10, kernel-rt-modules 4.18.0-553.16.1.rt7.357.el8_10, kernel-rt-debug-core 4.18.0-553.16.1.rt7.357.el8_10, kernel-rt-debug-modules 4.18.0-553.16.1.rt7.357.el8_10, kernel-rt-modules-extra 4.18.0-553.16.1.rt7.357.el8_10, +2 more
fixed: vendor fix RHSA-2024:5102

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: 2 y ago (2024-09-10)

Exploit prediction

0.22% chance of exploitation in the next 30 days, higher than 12% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.1	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Affected products

Linux Linux

Classification

Weakness

CWE-668 Exposure of Resource to Wrong Sphere

Technology feeds

Linux kernel rss critical rss

References

Sources

CVE List CVE-2022-48757
NVD CVE-2022-48757

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.

Summary