Vulnerabilities
- CVSS
- 5.5 Medium
- Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H- EPSS
- 0.13%
- Risk score
- 1.5
- Published
- 2026-04-22
- Status
- Published
In the Linux kernel, the following vulnerability has been resolved:
af_key: validate families in pfkey_send_migrate()
syzbot was able to trigger a crash in skb_put() [1]
Issue is that pfkey_send_migrate() does not check old/new families,
and that set_ipsecrequest() @family argument was truncated,
thus possibly overfilling the skb.
Validate families early, do not wait set_ipsecrequest().
[1]
skbuff: skb_over_panic: text:ffffffff8a752120 len:392 put:16 head:ffff88802a4ad040 data:ffff88802a4ad040 tail:0x188 end:0x180 dev:<NULL>
kernel BUG at net/core/skbuff.c:214 !
Call Trace:
<TASK>
skb_over_panic net/core/skbuff.c:219 [inline]
skb_put+0x159/0x210 net/core/skbuff.c:2655
skb_put_zero include/linux/skbuff.h:2788 [inline]
set_ipsecrequest net/key/af_key.c:3532 [inline]
pfkey_send_migrate+0x1270/0x2e50 net/key/af_key.c:3636
km_migrate+0x155/0x260 net/xfrm/xfrm_state.c:2848
xfrm_migrate+0x2140/0x2450 net/xfrm/xfrm_policy.c:4705
xfrm_do_migrate+0x8ff/0xaa0 net/xfrm/xfrm_user.c:3150
A flaw was found in the Linux kernel. The `pfkey_send_migrate` function, which manages security associations, does not properly validate address families. This oversight can lead to an overfill of the socket buffer (skb), a data structure used for network packets, when processing certain requests. A local user could exploit this vulnerability to trigger a kernel crash, resulting in a Denial of Service (DoS) for the affected system.
Coverage 6
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Advisories and references