What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-04-10 · updated 2026-08-04

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.

Affected products

• Linux kernel: from 5.13 before 5.15.5; 5.16-rc1 — fixed in 5.15.5

How to fix

Upgrade to a fixed version: Linux kernel 5.15.5. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/cc4a9cc03faa6d8db1a6954bb536f2c1e63bdff6
• https://git.kernel.org/stable/c/ebeda7a9528ae690e6bf12791a868f0cca8391f2
• https://git.kernel.org/stable/c/cc4a9cc03faa6d8db1a6954bb536f2c1e63bdff6
• https://git.kernel.org/stable/c/ebeda7a9528ae690e6bf12791a868f0cca8391f2

Get alerted when CVE-2021-47215 or the next vulnerability affects your stack