CVE-2025-21670 — NULL Pointer Dereference in Linux
Severity
5.5MEDIUMNVD
OSV5.9
EPSS
0.0%
top 94.66%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedJan 31
Latest updateJul 17
Description
In the Linux kernel, the following vulnerability has been resolved:
vsock/bpf: return early if transport is not assigned
Some of the core functions can only be called if the transport
has been assigned.
As Michal reported, a socket might have the transport at NULL,
for example after a failed connect(), causing the following trace:
BUG: kernel NULL pointer dereference, address: 00000000000000a0
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 12faf8067…
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
Affected Packages5 packages
▶CVEListV5linux/linux634f1a7110b439c65fd8a809171c1d2d28bcea6f — 58e586c30d0b6f5dc0174a41026f2b0a48c9aab6+3