Search/CVE-2026-43384
● CVE — Critical

CVE-2026-43384

VendorlinuxProductlinux kernelDiscoveredMay 8, 2026UpdatedMay 26, 2026

In the Linux kernel, the following vulnerability has been resolved: net/tcp-ao: Fix MAC comparison to be constant-time To prevent timing attacks, MACs need to be compared in constant time. Use the appropriate helper function for this.

View graph Watch Export
CVSS v3.1
9.8 CRITICAL
EPSS
0.46%
probability of exploitation in 30 days
CISA KEV
Not listed
no confirmed exploitation reported
News coverage
20
sources referencing this CVE
Related IOCs
0
seen in the same coverage
EPSS Trend
Sep 25, 2026 → Oct 26, 2026
▼ 0.21pp
0.67% → 0.46% over 2 tracked changes
CVSS v3.1 Detail
Attack VectorNETWORK
Attack ComplexityLOW
Privileges RequiredNONE
User InteractionNONE
ScopeUNCHANGED
ConfidentialityHIGH
IntegrityHIGH
AvailabilityHIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Connections
21 relationships
Timeline
disclosure → media coverage
May 8, 2026
Disclosure — published as a CVE record. · last revised by NVD May 26, 2026
Jul 1, 2026
ubuntu.com reports: USN-8490-1: Linux kernel vulnerabilities
Jul 1, 2026
ubuntu.com reports: USN-8491-1: Linux kernel (OEM) vulnerabilities
Jul 1, 2026
ubuntu.com reports: USN-8492-1: Linux kernel vulnerabilities
Jul 2, 2026
ubuntu.com reports: USN-8492-2: Linux kernel vulnerabilities
Jul 2, 2026
ubuntu.com reports: USN-8497-1: Linux kernel (Low Latency) vulnerabilities
Jul 2, 2026
ubuntu.com reports: USN-8498-1: Linux kernel (NVIDIA Tegra) vulnerabilities
Jul 2, 2026
ubuntu.com reports: USN-8499-1: Linux kernel (Xilinx) vulnerabilities
Jul 6, 2026
ubuntu.com reports: USN-8508-1: Linux kernel (NVIDIA) vulnerabilities
Jul 6, 2026
ubuntu.com reports: USN-8492-3: Linux kernel (Raspberry Pi Real-time) vulnerabilities
Jul 9, 2026
ubuntu.com reports: USN-8490-2: Linux kernel (Raspberry Pi) vulnerabilities
Jul 9, 2026
ubuntu.com reports: USN-8492-4: Linux kernel (Raspberry Pi) vulnerabilities
Jul 10, 2026
ubuntu.com reports: USN-8492-5: Linux kernel (FIPS) vulnerabilities
Jul 15, 2026
ubuntu.com reports: USN-8545-1: Linux kernel (HWE) vulnerabilities
Jul 15, 2026
ubuntu.com reports: USN-8546-1: Linux kernel (Raspberry Pi) vulnerabilities
Jul 24, 2026
ubuntu.com reports: USN-8604-1: Linux kernel (Azure) vulnerabilities
Jul 24, 2026
ubuntu.com reports: USN-8605-1: Linux kernel (Azure CVM) vulnerabilities
Jul 24, 2026
ubuntu.com reports: USN-8606-1: Linux kernel (Azure) vulnerabilities
Jul 24, 2026
ubuntu.com reports: USN-8607-1: Linux kernel (Azure CVM) vulnerabilities
Jul 24, 2026
ubuntu.com reports: USN-8609-1: Linux kernel (Azure CVM) vulnerabilities
Jul 28, 2026
ubuntu.com reports: USN-8619-1: Linux kernel (HWE) vulnerabilities