CVE-2026-31515
Full vulnerability record from the local CVENow database.
Description
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
Severity
MEDIUM
CVSS score
5.5
(v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-04-22 14:16:50.940000
Last modified
2026-11-05 22:18:36.687000
View original CVE JSON
{
"id": "CVE-2026-31515",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-04-22T14:16:50.940",
"lastModified": "2026-11-05T22:18:36.687",
"vulnStatus": "Modified",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\naf_key: validate families in pfkey_send_migrate()\n\nsyzbot was able to trigger a crash in skb_put() [1]\n\nIssue is that pfkey_send_migrate() does not check old/new families,\nand that set_ipsecrequest() @family argument was truncated,\nthus possibly overfilling the skb.\n\nValidate families early, do not wait set_ipsecrequest().\n\n[1]\n\nskbuff: skb_over_panic: text:ffffffff8a752120 len:392 put:16 head:ffff88802a4ad040 data:ffff88802a4ad040 tail:0x188 end:0x180 dev:<NULL>\n kernel BUG at net/core/skbuff.c:214 !\nCall Trace:\n <TASK>\n skb_over_panic net/core/skbuff.c:219 [inline]\n skb_put+0x159/0x210 net/core/skbuff.c:2655\n skb_put_zero include/linux/skbuff.h:2788 [inline]\n set_ipsecrequest net/key/af_key.c:3532 [inline]\n pfkey_send_migrate+0x1270/0x2e50 net/key/af_key.c:3636\n km_migrate+0x155/0x260 net/xfrm/xfrm_state.c:2848\n xfrm_migrate+0x2140/0x2450 net/xfrm/xfrm_policy.c:4705\n xfrm_do_migrate+0x8ff/0xaa0 net/xfrm/xfrm_user.c:3150"
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