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.

A flaw was found in the Linux kernel's packet sampling (psample) network module. This vulnerability, specifically within the PSAMPLE_ATTR_DATA attribute handling, occurs because the nla_put() function does not properly clear padding bytes. When the data length is not a multiple of four bytes, uninitialized memory from the kernel can be exposed. A local attacker could exploit this information leak to potentially gain access to sensitive data.

Red Hat Enterprise Linux 10 Fix deferred kernel Red Hat Enterprise Linux 6 Not affected kernel Red Hat Enterprise Linux 7 Fix deferred kernel Red Hat Enterprise Linux 7 Fix deferred kernel-rt Red Hat Enterprise Linux 8 Fix deferred kernel Red Hat Enterprise Linux 8 Fix deferred kernel-rt Red Hat Enterprise Linux 9 Fix deferred kernel Red Hat Enterprise Linux 9 Fix deferred kernel-rt https://www.cve.org/CVERecord?id=CVE-2026-64553 https://nvd.nist.gov/vuln/detail/CVE-2026-64553 https://lore.kernel.org/linux-cve-announce/2026072738-CVE-2026-64553-87c9@gregkh/T