CVE-2024-26583 tls: fix race between async notify and socket close

What is CVE-2024-26583?

CVE-2024-26583 is a critical vulnerability in Linux kernel, published on 21 Feb 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:

tls: fix race between async notify and socket close

The submitting thread (one which called recvmsg/sendmsg) may exit as soon as the async crypto handler calls complete() so any code past that point risks touching already freed data.

Try to avoid the locking and extra flags altogether. Have the main thread hold an extra reference, this way we can depend solely on the atomic ref counter for synchronization.

Don't futz with reiniting the completion, either, we are now tightly controlling when completion fires.

Weakness: CWE-362

Which versions are affected by CVE-2024-26583?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-26583?

Apply the vendor's patch.

Is CVE-2024-26583 being exploited?

There is no known exploitation of CVE-2024-26583 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 AZL-35474, AZL-35799, AZL-35812, BELL-CVE-2024-26583, DEBIAN-CVE-2024-26583, GHSA-j737-8h5g-42g9 and 2 more.