CVE-2026-31515 (GCVE-0-2026-31515)

Vulnerability from cvelistv5 – Published: 2026-04-22 13:54 – Updated: 2026-04-22 13:54
VLAI?
Title
af_key: validate families in pfkey_send_migrate()
Summary
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 ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 08de61beab8a21c8e0b3906a97defda5f1f66ece , < d0c5aa8dd38887714f1aad04236a3620b56a5e4e (git)
Affected: 08de61beab8a21c8e0b3906a97defda5f1f66ece , < e06b596fc4eb01936a2e5dccad17c946d660bab8 (git)
Affected: 08de61beab8a21c8e0b3906a97defda5f1f66ece , < 8ddf8de7e758f6888988467af9ffc8adf589fb16 (git)
Affected: 08de61beab8a21c8e0b3906a97defda5f1f66ece , < d3225e6b9bd51ec177970a628fe4b11237ce87d5 (git)
Affected: 08de61beab8a21c8e0b3906a97defda5f1f66ece , < 7b18692c59afb8e5c364c8e3ac01e51dd6b52028 (git)
Affected: 08de61beab8a21c8e0b3906a97defda5f1f66ece , < 83f644ea92987c100b82d8481ae2230faeed3d34 (git)
Affected: 08de61beab8a21c8e0b3906a97defda5f1f66ece , < ee836e820a40e2ca4da8af7310bff92d586772d4 (git)
Affected: 08de61beab8a21c8e0b3906a97defda5f1f66ece , < eb2d16a7d599dc9d4df391b5e660df9949963786 (git)
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    Linux Linux Affected: 2.6.21
Unaffected: 0 , < 2.6.21 (semver)
Unaffected: 5.10.253 , ≤ 5.10.* (semver)
Unaffected: 5.15.203 , ≤ 5.15.* (semver)
Unaffected: 6.1.168 , ≤ 6.1.* (semver)
Unaffected: 6.6.131 , ≤ 6.6.* (semver)
Unaffected: 6.12.80 , ≤ 6.12.* (semver)
Unaffected: 6.18.21 , ≤ 6.18.* (semver)
Unaffected: 6.19.11 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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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:\u003cNULL\u003e\n kernel BUG at net/core/skbuff.c:214 !\nCall Trace:\n \u003cTASK\u003e\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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  }
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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