CVE-2025-21759
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2025-21759
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-21759.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2025-21759
- Downstream
- Related
- Published
- 2025-02-27T03:15:16Z
- Modified
- 2025-08-09T20:01:26Z
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
ipv6: mcast: extend RCU protection in igmp6_send()
igmp6_send() can be called without RTNL or RCU being held.
Extend RCU protection so that we can safely fetch the net pointer and avoid a potential UAF.
Note that we no longer can use sockallocsendskb() because ipv6.igmpsk uses GFP_KERNEL allocations which can sleep.
Instead use allocskb() and charge the net->ipv6.igmpsk socket under RCU protection.
- References