In the Linux kernel, the following vulnerability has been resolved: sctp: fix uninit-value in __sctp_rcv_asconf_lookup() __sctp_rcv_asconf_lookup() in net/sctp/input.c only checks that the ASCONF chunk can hold the ADDIP header and a parameter header, then calls af->from_addr_param(), which reads the full address (16 bytes for IPv6) trusting the parameter's declared length. An unauthenticated peer can send a truncated trailing ASCONF chunk that declares an IPv6 address parameter but stops after the 4-byte parameter header; reached from the no-association lookup path, from_addr_param() then reads uninitialized bytes past the parameter. Impact: an unauthenticated SCTP peer makes the receive path read up to 16 bytes of uninitialized memory past a truncated ASCONF address parameter. The sibling __sctp_rcv_init_lookup() bounds parameters with sctp_walk_params(); this path open-codes the fetch and omits the bound. Verify the whole address parameter lies within the chunk before from_addr_param() reads it, the same class of fix as commit 51e5ad549c43 ("net: sctp: fix KMSAN uninit-value in sctp_inq_pop").

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  • Linux Kernel

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References
Link Providers
https://git.kernel.org/stable/c/446e0ecd845abc394b24ae2030a883572bec9d16 cve-icon
https://git.kernel.org/stable/c/8ce96f1182644079249a24ac7e2ffc32e0301a46 cve-icon
https://git.kernel.org/stable/c/8e86817b8af4d552f3c6fe04ca52bb0c8c57411d cve-icon
https://git.kernel.org/stable/c/928dd94db23e8ba340f83d68f7f24d831b7a4426 cve-icon
https://git.kernel.org/stable/c/d6bd0bb7697ea8c0387b0d9d973453f479017b23 cve-icon
https://git.kernel.org/stable/c/d796cfd06074b579d265b28401306cadd30db945 cve-icon
https://git.kernel.org/stable/c/f76a8b323e28e0951f979dbef20a7496383c47df cve-icon
https://git.kernel.org/stable/c/f8373d7090b745728de66308deeecc67e8d319ce cve-icon
History

Thu, 25 Jun 2026 11:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-788

Thu, 25 Jun 2026 09:15:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: sctp: fix uninit-value in __sctp_rcv_asconf_lookup() __sctp_rcv_asconf_lookup() in net/sctp/input.c only checks that the ASCONF chunk can hold the ADDIP header and a parameter header, then calls af->from_addr_param(), which reads the full address (16 bytes for IPv6) trusting the parameter's declared length. An unauthenticated peer can send a truncated trailing ASCONF chunk that declares an IPv6 address parameter but stops after the 4-byte parameter header; reached from the no-association lookup path, from_addr_param() then reads uninitialized bytes past the parameter. Impact: an unauthenticated SCTP peer makes the receive path read up to 16 bytes of uninitialized memory past a truncated ASCONF address parameter. The sibling __sctp_rcv_init_lookup() bounds parameters with sctp_walk_params(); this path open-codes the fetch and omits the bound. Verify the whole address parameter lies within the chunk before from_addr_param() reads it, the same class of fix as commit 51e5ad549c43 ("net: sctp: fix KMSAN uninit-value in sctp_inq_pop").
Title sctp: fix uninit-value in __sctp_rcv_asconf_lookup()
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-06-25T08:39:25.911Z

Reserved: 2026-06-09T07:44:35.392Z

Link: CVE-2026-53225

cve-icon Vulnrichment

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Updated: 2026-06-25T11:30:06Z