Search/CVE-2026-53309
● CVE — Critical

CVE-2026-53309

VendorlinuxProductlinux kernelDiscoveredJun 26, 2026UpdatedJul 6, 2026

In the Linux kernel, the following vulnerability has been resolved: ocfs2/dlm: fix off-by-one in dlm_match_regions() region comparison The local-vs-remote region comparison loop uses '<=' instead of '<', causing it to read one entry past the valid range of qr_regions. The other loops in the same function correctly use '<'. Fix the loop condition to use '<' for consistency and correctness.

CVSS v3.1
9.8 CRITICAL
EPSS
0.40%
probability of exploitation in 30 days
CISA KEV
Not listed
no confirmed exploitation reported
News coverage
51
sources referencing this CVE
Related IOCs
0
seen in the same coverage
Intelligence Reports1
1 intelligence report available

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EPSS Trend
Aug 26, 2026 → Sep 27, 2026
▼ 0.36pp
0.76% → 0.40% over 4 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
53 relationships
Timeline
disclosure → media coverage
Jun 26, 2026
Disclosure — published as a CVE record. · last revised by NVD Jul 6, 2026
Jul 20, 2026
ubuntu.com reports: USN-8566-1: Linux kernel vulnerabilities
Jul 20, 2026
ubuntu.com reports: USN-8567-1: Linux kernel vulnerabilities
Jul 20, 2026
ubuntu.com reports: USN-8568-1: Linux kernel (OEM) vulnerabilities
Jul 20, 2026
ubuntu.com reports: USN-8569-1: Linux kernel (HWE) vulnerabilities
Jul 21, 2026
ubuntu.com reports: USN-8574-1: Linux kernel (GCP FIPS) vulnerabilities
Jul 21, 2026
ubuntu.com reports: USN-8575-1: Linux kernel vulnerabilities
Jul 21, 2026
ubuntu.com reports: USN-8576-1: Linux kernel (NVIDIA Tegra) vulnerabilities
Jul 23, 2026
ubuntu.com reports: USN-8593-1: Linux kernel vulnerabilities
Jul 23, 2026
ubuntu.com reports: USN-8574-2: Linux kernel vulnerabilities
Jul 23, 2026
ubuntu.com reports: USN-8595-1: Linux kernel (Oracle) vulnerabilities
Jul 23, 2026
ubuntu.com reports: USN-8596-1: Linux kernel (NVIDIA) vulnerabilities
Jul 23, 2026
ubuntu.com reports: USN-8575-2: Linux kernel vulnerabilities
Jul 23, 2026
ubuntu.com reports: USN-8576-2: Linux kernel (NVIDIA Tegra) vulnerabilities
Jul 24, 2026
ubuntu.com reports: USN-8603-1: Linux kernel (Azure) vulnerabilities
Jul 24, 2026
ubuntu.com reports: USN-8595-2: Linux kernel (AWS) 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-8608-1: Linux kernel (Azure FIPS) vulnerabilities
Jul 24, 2026
ubuntu.com reports: USN-8609-1: Linux kernel (Azure CVM) vulnerabilities
Jul 24, 2026
ubuntu.com reports: USN-8575-3: Linux kernel vulnerabilities
Jul 24, 2026
ubuntu.com reports: USN-8610-1: Linux kernel (Azure CVM) vulnerabilities
Jul 28, 2026
ubuntu.com reports: USN-8618-1: Linux kernel vulnerabilities
Jul 28, 2026
ubuntu.com reports: USN-8574-3: Linux kernel vulnerabilities
Jul 28, 2026
ubuntu.com reports: USN-8595-3: Linux kernel (AWS) vulnerabilities
Jul 28, 2026
ubuntu.com reports: USN-8619-1: Linux kernel (HWE) vulnerabilities
Jul 28, 2026
ubuntu.com reports: USN-8620-1: Linux kernel vulnerabilities
Jul 29, 2026
ubuntu.com reports: USN-8620-2: Linux kernel (Azure FIPS) vulnerabilities
Jul 31, 2026
ubuntu.com reports: USN-8620-3: Linux kernel (Intel IoTG) vulnerabilities
Jul 31, 2026
ubuntu.com reports: USN-8620-4: Linux kernel (Intel IoTG) vulnerabilities
Aug 18, 2026
ubuntu.com reports: USN-8644-1: Linux kernel vulnerabilities
Aug 18, 2026
ubuntu.com reports: USN-8645-1: Linux kernel (Oracle) vulnerabilities
Aug 18, 2026
ubuntu.com reports: USN-8646-1: Linux kernel vulnerabilities
Aug 20, 2026
ubuntu.com reports: USN-8644-2: Linux kernel (GCP) vulnerabilities
Aug 20, 2026
ubuntu.com reports: USN-8663-1: Linux kernel (NVIDIA) vulnerabilities
Aug 20, 2026
ubuntu.com reports: USN-8664-1: Linux kernel (NVIDIA BaseOS) vulnerabilities
Aug 20, 2026
ubuntu.com reports: USN-8665-1: Linux kernel (Raspberry Pi) vulnerabilities
Aug 21, 2026
ubuntu.com reports: USN-8668-1: Linux kernel (GCP) vulnerabilities
Aug 27, 2026
ubuntu.com reports: USN-8644-3: Linux kernel (Azure) vulnerabilities
Sep 2, 2026
ubuntu.com reports: USN-8714-1: Linux kernel vulnerabilities
Sep 2, 2026
ubuntu.com reports: USN-8715-1: Linux kernel (Oracle) vulnerabilities
Sep 4, 2026
ubuntu.com reports: USN-8725-1: Linux kernel vulnerabilities
Sep 4, 2026
ubuntu.com reports: USN-8714-2: Linux kernel vulnerabilities
Sep 7, 2026
ubuntu.com reports: USN-8728-1: Linux kernel (GCP) vulnerabilities
Sep 10, 2026
ubuntu.com reports: USN-8748-1: Linux kernel (NVIDIA) vulnerabilities
Sep 18, 2026
ubuntu.com reports: USN-8714-3: Linux kernel vulnerabilities
Sep 18, 2026
ubuntu.com reports: USN-8715-2: Linux kernel (AWS FIPS) vulnerabilities
Sep 18, 2026
ubuntu.com reports: USN-8725-2: Linux kernel (AWS) vulnerabilities
Sep 21, 2026
ubuntu.com reports: USN-8668-2: Linux kernel (Raspberry Pi) vulnerabilities
Sep 22, 2026
ubuntu.com reports: USN-8728-2: Linux kernel (Azure) vulnerabilities
Sep 29, 2026
ubuntu.com reports: USN-8728-3: Linux kernel (Oracle) vulnerabilities
Sep 30, 2026
ubuntu.com reports: USN-8850-1: Linux kernel (BlueField) vulnerabilities