CVE-2026-46096 tpm2-sessions: Fix missing tpm_buf_destroy() in tpm2_read_public()

What is CVE-2026-46096?

CVE-2026-46096 is a medium-severity memory corruption vulnerability in Linux kernel, published on 27 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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

tpm2-sessions: Fix missing tpm_buf_destroy() in tpm2_read_public()

tpm2_read_public() calls tpm_buf_init() but fails to call tpm_buf_destroy() on two exit paths, leaking a page allocation:

1. When name_size() returns an error (unrecognized hash algorithm), the function returns directly without destroying the buffer.

2. On the success path, the buffer is never destroyed before returning.

All other error paths in the function correctly call tpm_buf_destroy() before returning.

Fix both by adding the missing tpm_buf_destroy() calls.

Which versions are affected by CVE-2026-46096?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2026-46096?

Apply the vendor's patch.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2026-46096 being exploited?

There is no known exploitation of CVE-2026-46096 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BELL-CVE-2026-46096, DEBIAN-CVE-2026-46096, GHSA-wq6x-xf86-6rwf, ROOT-OS-DEBIAN-13-CVE-2026-46096, UBUNTU-CVE-2026-46096.