Search/CVE-2025-21791
● CVE — High

CVE-2025-21791

VendorlinuxProductlinux kernelDiscoveredFeb 27, 2025UpdatedNov 3, 2025

In the Linux kernel, the following vulnerability has been resolved: vrf: use RCU protection in l3mdev_l3_out() l3mdev_l3_out() can be called without RCU being held: raw_sendmsg() ip_push_pending_frames() ip_send_skb() ip_local_out() __ip_local_out() l3mdev_ip_out() Add rcu_read_lock() / rcu_read_unlock() pair to avoid a potential UAF.

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CVSS v3.1
7.8 HIGH
EPSS
0.27%
probability of exploitation in 30 days
CISA KEV
Not listed
no confirmed exploitation reported
News coverage
8
sources referencing this CVE
Related IOCs
0
seen in the same coverage
EPSS Trend
Aug 16, 2026 → Sep 23, 2026
● 0.01pp
0.26% → 0.27% over 2 tracked changes
CVSS v3.1 Detail
Attack VectorLOCAL
Attack ComplexityLOW
Privileges RequiredLOW
User InteractionNONE
ScopeUNCHANGED
ConfidentialityHIGH
IntegrityHIGH
AvailabilityHIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Connections
10 relationships
Timeline
disclosure → media coverage
Feb 27, 2025
Disclosure — published as a CVE record. · last revised by NVD Nov 3, 2025
Aug 19, 2025
ubuntu.com reports: USN-7703-1: Linux kernel vulnerabilities
Aug 20, 2025
ubuntu.com reports: USN-7703-2: Linux kernel vulnerabilities
Aug 26, 2025
ubuntu.com reports: USN-7719-1: Linux kernel (Raspberry Pi Real-time) vulnerabilities
Dec 3, 2025
ubuntu.com reports: USN-7907-2: Linux kernel (FIPS) vulnerabilities
Dec 4, 2025
ubuntu.com reports: USN-7907-3: Linux kernel vulnerabilities
Dec 4, 2025
ubuntu.com reports: USN-7907-4: Linux kernel (GCP FIPS) vulnerabilities
Dec 12, 2025
ubuntu.com reports: USN-7907-5: Linux kernel kernel vulnerabilities
Dec 16, 2025
ubuntu.com reports: USN-7937-1: Linux kernel (Azure FIPS) vulnerabilities