High severity · published Feb 27, 2025
CVE-2025-21763
neighbour: use RCU protection in __neigh_notify()
7.8
CVSS
0.3%
EPSS
No
On KEV
Description
In the Linux kernel, the following vulnerability has been resolved:
neighbour: use RCU protection in __neigh_notify()
__neigh_notify() can be called without RTNL or RCU protection.
Use RCU protection to avoid 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 18% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
2.6.25 before 5.4.291; 5.5 before 5.10.235; 5.11 before 5.15.179; 5.16 before 6.1.129; 6.2 before 6.6.79; 6.7 before 6.12.16; +3 more · source: NVD
LI
Linux · Linux
426b5303eb435d98b9bee37a807be386bc2b3320 before e1aed6be381bcd7f46d4ca9d7ef0f5f3d6a1be32; 426b5303eb435d98b9bee37a807be386bc2b3320 before 8666e9aab801328c1408a19fbf4070609dc0695a; 426b5303eb435d98b9bee37a807be386bc2b3320 before 40d8f2f2a373b6c294ffac394d2bb814b572ead1; 426b5303eb435d98b9bee37a807be386bc2b3320 before 784eb2376270e086f7db136d154b8404edacf97b; 426b5303eb435d98b9bee37a807be386bc2b3320 before 1cbb2aa90cd3fba15ad7efb5cdda28f3d1082379; 426b5303eb435d98b9bee37a807be386bc2b3320 before cdd5c2a12ddad8a77ce1838ff9f29aa587de82df; +3 more · source: vendor
SS
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem · Siemens
0; 0 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-21763
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-21763
Patch
https://git.kernel.org/stable/c/1cbb2aa90cd3fba15ad7efb5cdda28f3d1082379
Patch
https://git.kernel.org/stable/c/40d8f2f2a373b6c294ffac394d2bb814b572ead1
Patch
https://git.kernel.org/stable/c/559307d25235e24b5424778c7332451b6c741159
Patch
https://git.kernel.org/stable/c/784eb2376270e086f7db136d154b8404edacf97b
Patch
https://git.kernel.org/stable/c/8666e9aab801328c1408a19fbf4070609dc0695a
Patch
https://git.kernel.org/stable/c/becbd5850c03ed33b232083dd66c6e38c0c0e569
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