CVE-2025-21864 — NULL Pointer Dereference in Linux
Severity
5.5MEDIUMNVD
EPSS
0.1%
top 84.23%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedMar 12
Latest updateSep 3
Description
In the Linux kernel, the following vulnerability has been resolved:
tcp: drop secpath at the same time as we currently drop dst
Xiumei reported hitting the WARN in xfrm6_tunnel_net_exit while
running tests that boil down to:
- create a pair of netns
- run a basic TCP test over ipcomp6
- delete the pair of netns
The xfrm_state found on spi_byaddr was not deleted at the time we
delete the netns, because we still have a reference on it. This
lingering reference comes from a secpath (which holds …
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 1.8 | Impact: 3.6