CVE-2026-64553: net: psample: fix info leak in PSAMPLE_ATTR_DATA

Severity: unknown
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-27 · updated 2026-08-17

Description

In the Linux kernel, the following vulnerability has been resolved: net: psample: fix info leak in PSAMPLE_ATTR_DATA psample open codes nla_put() presumably to avoid wiping the data with 0s just to override it with packet data. This open coding is missing clearing the pad, however, each netlink attr is padded to 4B and data_len may not be divisible by 4B.

Affected products

Linux kernel: 4.11 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/0d3ea2ccddda442077fc44f11d873209c97ec50b
https://git.kernel.org/stable/c/48930f6c59fd0056c2de46ce52bfe27d9c9e5eb6
https://git.kernel.org/stable/c/794a0d8bdbb39e083ed42caccb86d687a9b53570
https://git.kernel.org/stable/c/7fe7e6949964aa8ee6305f09db2dc9eede977bb3
https://git.kernel.org/stable/c/a6cfb924ad74efce254e99c197d2e3863de70868
https://git.kernel.org/stable/c/aedd02af1f8b0bceb7f42f5a21c41634ca9ed390
https://git.kernel.org/stable/c/befe1ebe7fc2c65c80074bc34ceeb0a721ed3cd2
https://git.kernel.org/stable/c/e2fa322782a2d7d8078f7bb20817e0aa9f7c32e9

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