CVE-2022-48757

HIGH
Published Jun 20, 2024 Modified Sep 17, 2025 CWE-668

Description

In the Linux kernel, the following vulnerability has been resolved: net: fix information leakage in /proc/net/ptype 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.

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CVSS v3.1 Score

7.1
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Weakness Type (CWE)

CWE-668 CWE-668

Affected Products

Vendor Product
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel

References

Advisories & Patches

https://git.kernel.org/stable/c/47934e06b65637c88a762d9c98329ae6e3238888 https://git.kernel.org/stable/c/839ec7039513a4f84bfbaff953a9393471176bee https://git.kernel.org/stable/c/8f88c78d24f6f346919007cd459fd7e51a8c7779 https://git.kernel.org/stable/c/b67ad6170c0ea87391bb253f35d1f78857736e54 https://git.kernel.org/stable/c/be1ca30331c7923c6f376610c1bd6059be9b1908 https://git.kernel.org/stable/c/c38023032a598ec6263e008d62c7f02def72d5c7 https://git.kernel.org/stable/c/db044d97460ea792110eb8b971e82569ded536c6 https://git.kernel.org/stable/c/e372ecd455b6ebc7720f52bf4b5f5d44d02f2092 https://git.kernel.org/stable/c/e43669c77cb3a742b7d84ecdc7c68c4167a7709b https://git.kernel.org/stable/c/47934e06b65637c88a762d9c98329ae6e3238888 https://git.kernel.org/stable/c/839ec7039513a4f84bfbaff953a9393471176bee https://git.kernel.org/stable/c/8f88c78d24f6f346919007cd459fd7e51a8c7779 https://git.kernel.org/stable/c/b67ad6170c0ea87391bb253f35d1f78857736e54 https://git.kernel.org/stable/c/be1ca30331c7923c6f376610c1bd6059be9b1908 https://git.kernel.org/stable/c/c38023032a598ec6263e008d62c7f02def72d5c7 https://git.kernel.org/stable/c/db044d97460ea792110eb8b971e82569ded536c6 https://git.kernel.org/stable/c/e372ecd455b6ebc7720f52bf4b5f5d44d02f2092 https://git.kernel.org/stable/c/e43669c77cb3a742b7d84ecdc7c68c4167a7709b

Frequently Asked Questions

What is CVE-2022-48757? +
In the Linux kernel, the following vulnerability has been resolved: net: fix information leakage in /proc/net/ptype 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. It has a CVSS v3.1 base score of 7.1 (HIGH).
How severe is CVE-2022-48757? +
CVE-2022-48757 has a CVSS v3.1 score of 7.1 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.
What products are affected by CVE-2022-48757? +
CVE-2022-48757 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2022-48757? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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