af_key: validate families in pfkey_send_migrate()

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Summary

CVECVE-2026-31515
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-22 14:16:50 UTC
Updated2026-04-28 16:20:43 UTC
DescriptionIn 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

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.000240000 probability, percentile 0.067930000 (date 2026-04-26)

Problem Types: CWE-476

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 08de61beab8a21c8e0b3906a97defda5f1f66ece d0c5aa8dd38887714f1aad04236a3620b56a5e4e git Not specified
CNA Linux Linux affected 08de61beab8a21c8e0b3906a97defda5f1f66ece e06b596fc4eb01936a2e5dccad17c946d660bab8 git Not specified
CNA Linux Linux affected 08de61beab8a21c8e0b3906a97defda5f1f66ece 8ddf8de7e758f6888988467af9ffc8adf589fb16 git Not specified
CNA Linux Linux affected 08de61beab8a21c8e0b3906a97defda5f1f66ece d3225e6b9bd51ec177970a628fe4b11237ce87d5 git Not specified
CNA Linux Linux affected 08de61beab8a21c8e0b3906a97defda5f1f66ece 7b18692c59afb8e5c364c8e3ac01e51dd6b52028 git Not specified
CNA Linux Linux affected 08de61beab8a21c8e0b3906a97defda5f1f66ece 83f644ea92987c100b82d8481ae2230faeed3d34 git Not specified
CNA Linux Linux affected 08de61beab8a21c8e0b3906a97defda5f1f66ece ee836e820a40e2ca4da8af7310bff92d586772d4 git Not specified
CNA Linux Linux affected 08de61beab8a21c8e0b3906a97defda5f1f66ece eb2d16a7d599dc9d4df391b5e660df9949963786 git Not specified
CNA Linux Linux affected 2.6.21 Not specified
CNA Linux Linux unaffected 2.6.21 semver Not specified
CNA Linux Linux unaffected 5.10.253 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.203 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.168 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.131 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.80 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.21 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.11 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/e06b596fc4eb01936a2e5dccad17c946d660bab8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/d0c5aa8dd38887714f1aad04236a3620b56a5e4e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/8ddf8de7e758f6888988467af9ffc8adf589fb16 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/d3225e6b9bd51ec177970a628fe4b11237ce87d5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/eb2d16a7d599dc9d4df391b5e660df9949963786 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/ee836e820a40e2ca4da8af7310bff92d586772d4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/7b18692c59afb8e5c364c8e3ac01e51dd6b52028 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/83f644ea92987c100b82d8481ae2230faeed3d34 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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