CVE-2026-43493 (CVSS 9.8)

Description

In the Linux kernel, the following vulnerability has been resolved: crypto: pcrypt - Fix handling of MAY_BACKLOG requests MAY_BACKLOG requests can return EBUSY. Handle them by checking for that value and filtering out EINPROGRESS notifications.

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CVSS v3.1 Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0054

Probability of exploitation

0.41%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other References

https://git.kernel.org/stable/c/46271895ddfb1ba41f89f7e0dffbe9c2bcf7380a https://git.kernel.org/stable/c/77d55bc8675ee851ed639dc9be77325a8024cf67 https://git.kernel.org/stable/c/915b692e6cb723aac658c25eb82c58fd81235110 https://git.kernel.org/stable/c/9f1cbca178c03188e201ed175251372149bb25f2 https://git.kernel.org/stable/c/eb34e243df57e32f4c08fa191f3602ea19076276

Frequently Asked Questions

What is CVE-2026-43493? +

In the Linux kernel, the following vulnerability has been resolved: crypto: pcrypt - Fix handling of MAY_BACKLOG requests MAY_BACKLOG requests can return EBUSY. Handle them by checking for that value and filtering out EINPROGRESS notifications. It has a CVSS v3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2026-43493? +

CVE-2026-43493 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.0054, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-43493? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

CVE-2026-43493