Linux Kernel sctp Adaptation Indication Param Length Bypass
CVE-2026-80717 Published on August 28, 2026
sctp: validate Adaptation Indication parameter length
In the Linux kernel, the following vulnerability has been resolved:
sctp: validate Adaptation Indication parameter length
The Adaptation Layer Indication parameter contains a fixed 32-bit
Adaptation Code Point after its parameter header. However,
sctp_verify_param() accepts a header-only parameter because the generic
parameter walker only requires the header to be present.
sctp_process_param() then reads adaptation_ind beyond the declared
parameter. When the malformed parameter is last in an INIT, the read
starts at the receive skb tail, and the value is copied into the state
cookie returned in the INIT ACK. This may disclose four receive-buffer
tail bytes.
Require the declared parameter length to match the fixed structure size
and abort the association through the existing invalid parameter length
path otherwise.
Products Associated with CVE-2026-80717
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Affected Versions
Linux:- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below fa7861ddbe3b525b5d541c15c3953d3569e6eb0e is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 4c92c601c061e5602db2edeea54fef74aa304027 is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 7b7e4e3640d57bd8857f0052c8b0d8ed4e5e954a is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 93942b5772e0eee4147d4799cc1b936ae12fa615 is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 5fd7cfc708dfc988ae9920c21075e6121bc89926 is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 17b412468c7a44f66a385bda48cdc1e94e39bd6d is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below bfa28cf99eb4d096c87da939f54233444d209ca5 is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 74b21f52c5c5a71a05c0ff70e513f4f04ff28b17 is affected.
- Version 2.6.12 is affected.
- Before 2.6.12 is unaffected.
- Version 5.10.265, <= 5.10.* is unaffected.
- Version 5.15.216, <= 5.15.* is unaffected.
- Version 6.1.183, <= 6.1.* is unaffected.
- Version 6.6.151, <= 6.6.* is unaffected.
- Version 6.12.103, <= 6.12.* is unaffected.
- Version 6.18.44, <= 6.18.* is unaffected.
- Version 7.1.8, <= 7.1.* is unaffected.
- Version 7.2, <= * is unaffected.