What is CVE-2026-43500?

CVE-2026-43500 is a high-severity vulnerability in Linux, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2026-05-11.

How severe is CVE-2026-43500?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2026-43500 known to be exploited?

4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Linux

CVE-2026-43500

In the Linux kernel, the following vulnerability has been resolved: rxrpc: Also unshare DATA/RESPONSE packets when paged frags are present The DATA-packet handler in rxrpc_input_call_event() and the RESPONSE handler in rxrpc_verify_respo…

Vulnerability class: Buffer Overflow

EPSS: 0.435 (97.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Linux — versions 7.1-rc3, 7.0.6, 6.6.140
Linux Linux_kernel — versions 5.3, 7.1

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2026-43500?: CVE-2026-43500 is a high-severity vulnerability in Linux, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2026-05-11.
How severe is CVE-2026-43500?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2026-43500 known to be exploited?: 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.