High severity · published Feb 27, 2025
CVE-2025-21791
vrf: use RCU protection in l3mdev_l3_out()
7.8
CVSS
0.3%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 19% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
4.9 before 6.1.129; 6.2 before 6.6.79; 6.7 before 6.12.16; 6.13 before 6.13.4; 6.14; 6.14 · source: NVD
LI
Linux · Linux
a8e3e1a9f02094145580ea7920c6a1d9aabd5539 before 6ccaa5797f5362a2aad6baa6ddaf4715ac2dd51e; a8e3e1a9f02094145580ea7920c6a1d9aabd5539 before 20a3489b396764cc9376e32a9172bee26a89dc3b; a8e3e1a9f02094145580ea7920c6a1d9aabd5539 before 5bb4228c32261d06e4fbece37ec3828bcc005b6b; a8e3e1a9f02094145580ea7920c6a1d9aabd5539 before c7574740be8ce68a57d0aece24987b9be2114c3c; a8e3e1a9f02094145580ea7920c6a1d9aabd5539 before c40cb5c03e37552d6eff963187109e2c3f78ef6f; a8e3e1a9f02094145580ea7920c6a1d9aabd5539 before 022cac1c693add610ae76ede03adf4d9d5a2cf21; +3 more · source: vendor
SS
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem · Siemens
0 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-21791
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-21791
Patch
https://git.kernel.org/stable/c/022cac1c693add610ae76ede03adf4d9d5a2cf21
Patch
https://git.kernel.org/stable/c/20a3489b396764cc9376e32a9172bee26a89dc3b
Patch
https://git.kernel.org/stable/c/5bb4228c32261d06e4fbece37ec3828bcc005b6b
Patch
https://git.kernel.org/stable/c/6ccaa5797f5362a2aad6baa6ddaf4715ac2dd51e
Patch
https://git.kernel.org/stable/c/6d0ce46a93135d96b7fa075a94a88fe0da8e8773
Patch
https://git.kernel.org/stable/c/7b81425b517accefd46bee854d94954f5c57e019
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