sctp: fix auth_chunk_list capacity check in sctp_auth_ep_add_chunkid
In the Linux kernel, the following vulnerability has been resolved: sctp: fix auth_chunk_list capacity check in sctp_auth_ep_add_chunkid sctp_auth_ep_add_chunkid() uses SCTP_NUM_CHUNK_TYPES (20) as the capacity limit for ep->auth_chunk_list, allowing it to hold up to 20 chunk entries (param_hdr.length up to 24). However, the copy destination asoc->c.auth_chunks in struct sctp_cookie is only SCTP_AUTH_MAX_CHUNKS (16) entries (20 bytes). When more than 16 chunks are added, sctp_association_init() memcpy overflows the destination by up to 4 bytes. Fix by using SCTP_AUTH_MAX_CHUNKS as the capacity limit, matching the destination capacity.
CVE-2026-68320
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-68320
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "1f485649f52929d9937b346a920a522a7363e202",
"lessThan": "3d22a7da2e264f407c729f33a0a346ff76108bc6",
"versionType": "git"
},
{
"status": "affected",
"version": "1f485649f52929d9937b346a920a522a7363e202",
"lessThan": "6837c1c19a259518974cbc5a52017646e3906564",
"versionType": "git"
},
{
"status": "affected",
"version": "1f485649f52929d9937b346a920a522a7363e202",
"lessThan": "54bb4c03fa17cdcb157c26c33e60a78cf32960f5",
"versionType": "git"
},
{
"status": "affected",
"version": "1f485649f52929d9937b346a920a522a7363e202",
"lessThan": "5a365f1e423444c5da7eb689a8661633dad43e48",
"versionType": "git"
},
{
"status": "affected",
"version": "1f485649f52929d9937b346a920a522a7363e202",
"lessThan": "886e28e14ab655012779016d251fef53d103aa12",
"versionType": "git"
},
{
"status": "affected",
"version": "1f485649f52929d9937b346a920a522a7363e202",
"lessThan": "11092d79eb2b7c0068382f72fc2416d1786bb2e0",
"versionType": "git"
},
{
"status": "affected",
"version": "1f485649f52929d9937b346a920a522a7363e202",
"lessThan": "b6ea3dda09eb4d5caf7bbc00f857688cf9e98255",
"versionType": "git"
},
{
"status": "affected",
"version": "1f485649f52929d9937b346a920a522a7363e202",
"lessThan": "ff04b26794a16a8a879eb4fd2c02c2d6b03850e9",
"versionType": "git"
}
],
"programFiles": [
"net/sctp/auth.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.24"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.24",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.265",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.216",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.148",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.101",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.42",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.6",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/sctp/auth.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-68320
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #41695 · Revision 1
- Added to Heist Feed
- Publisher date