CVE-2021-47215 net/mlx5e: kTLS, Fix crash in RX resync flow

What is CVE-2021-47215?

CVE-2021-47215 is a critical vulnerability in Linux kernel, published on 10 Apr 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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

net/mlx5e: kTLS, Fix crash in RX resync flow

For the TLS RX resync flow, we maintain a list of TLS contexts that require some attention, to communicate their resync information to the HW. Here we fix list corruptions, by protecting the entries against movements coming from resync_handle_seq_match(), until their resync handling in napi is fully completed.

Which versions are affected by CVE-2021-47215?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2021-47215?

Apply the vendor's patch.

Is CVE-2021-47215 being exploited?

There is no known exploitation of CVE-2021-47215 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 DEBIAN-CVE-2021-47215, GHSA-66fh-rmm8-p9q4, UBUNTU-CVE-2021-47215.