CVE-2026-43493
CVE-2026-43493 is a critical-severity vulnerability in Linux Linux Kernel with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- EPSS exploit prediction: 1% (42nd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-30884
- Affected product: Linux Linux Kernel
- Published:
- Last modified:
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.
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.
- How severe is CVE-2026-43493?
- CVE-2026-43493 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2026-43493 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-43493?
- CVE-2026-43493 affects Linux Linux Kernel. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-43493?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- Does CVE-2026-43493 have an EU (EUVD) identifier?
- Yes. CVE-2026-43493 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30884.
- When was CVE-2026-43493 published?
- CVE-2026-43493 was published on 2026-05-19 and last updated on 2026-06-26.
References
- https://git.kernel.org/stable/c/1d7f07df450bac3301938fbc4251f2611be4084e
- https://git.kernel.org/stable/c/46271895ddfb1ba41f89f7e0dffbe9c2bcf7380a
- https://git.kernel.org/stable/c/76641449b28979ebd6c02e9598367e119e385236
- 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/ae7e95638d956d556d74b9abb9e780d3bd3dcd9e
- https://git.kernel.org/stable/c/eb34e243df57e32f4c08fa191f3602ea19076276
Affected products (1)
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
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