sctp: fix uninit-value in __sctp_rcv_asconf_lookup()
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").
CVE-2026-53225
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-2026-53225
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": "df21857714398acb8b24a8bb5a6d2286dd9c59ef",
"lessThan": "446e0ecd845abc394b24ae2030a883572bec9d16",
"versionType": "git"
},
{
"status": "affected",
"version": "df21857714398acb8b24a8bb5a6d2286dd9c59ef",
"lessThan": "928dd94db23e8ba340f83d68f7f24d831b7a4426",
"versionType": "git"
},
{
"status": "affected",
"version": "df21857714398acb8b24a8bb5a6d2286dd9c59ef",
"lessThan": "d796cfd06074b579d265b28401306cadd30db945",
"versionType": "git"
},
{
"status": "affected",
"version": "df21857714398acb8b24a8bb5a6d2286dd9c59ef",
"lessThan": "8ce96f1182644079249a24ac7e2ffc32e0301a46",
"versionType": "git"
},
{
"status": "affected",
"version": "df21857714398acb8b24a8bb5a6d2286dd9c59ef",
"lessThan": "d6bd0bb7697ea8c0387b0d9d973453f479017b23",
"versionType": "git"
},
{
"status": "affected",
"version": "df21857714398acb8b24a8bb5a6d2286dd9c59ef",
"lessThan": "f76a8b323e28e0951f979dbef20a7496383c47df",
"versionType": "git"
},
{
"status": "affected",
"version": "df21857714398acb8b24a8bb5a6d2286dd9c59ef",
"lessThan": "8e86817b8af4d552f3c6fe04ca52bb0c8c57411d",
"versionType": "git"
},
{
"status": "affected",
"version": "df21857714398acb8b24a8bb5a6d2286dd9c59ef",
"lessThan": "f8373d7090b745728de66308deeecc67e8d319ce",
"versionType": "git"
}
],
"programFiles": [
"net/sctp/input.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.25"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.25",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.259",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.210",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.176",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.143",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.94",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.36",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.13",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/sctp/input.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-53225
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #40786 · Revision 1
- Added to Heist Feed
- Publisher date