sctp: prevent peer transport count overflow
In the Linux kernel, the following vulnerability has been resolved: sctp: prevent peer transport count overflow sctp_assoc_add_peer() increments the association's 16-bit transport_count for every new unique peer. Adding the 65,536th transport wraps the count to zero. SCTP sock_diag uses transport_count to reserve the INET_DIAG_PEERS payload, then copies one sockaddr_storage for every entry in transport_addr_list. After the wrap, a diagnostic dump reserves an empty payload and writes 8 MiB of peer addresses past the skb tail. Reject a new unique peer when transport_count has reached U16_MAX. Perform the check after the existing-peer lookup so a duplicate address continues to return its existing transport at the limit.
CVE-2026-74469
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-2026-74469
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": "8f840e47f190cbe61a96945c13e9551048d42cef",
"lessThan": "b453e00da1211e997b82743d28af7714c59c05c8",
"versionType": "git"
},
{
"status": "affected",
"version": "8f840e47f190cbe61a96945c13e9551048d42cef",
"lessThan": "dfea32dd76f390e3155177b0038cc47b01386198",
"versionType": "git"
},
{
"status": "affected",
"version": "8f840e47f190cbe61a96945c13e9551048d42cef",
"lessThan": "80f48523a0fe42db2e7375dff4e38a25c117090a",
"versionType": "git"
},
{
"status": "affected",
"version": "8f840e47f190cbe61a96945c13e9551048d42cef",
"lessThan": "546221b86ceeba0d8fec92d46a0604bb7b62be07",
"versionType": "git"
},
{
"status": "affected",
"version": "8f840e47f190cbe61a96945c13e9551048d42cef",
"lessThan": "09e722030e8148ba4ed1e42c6b2ea57bda9f9895",
"versionType": "git"
},
{
"status": "affected",
"version": "8f840e47f190cbe61a96945c13e9551048d42cef",
"lessThan": "4ba5bf7ed50f235ea4581de8e7a0002f4ed287b0",
"versionType": "git"
},
{
"status": "affected",
"version": "8f840e47f190cbe61a96945c13e9551048d42cef",
"lessThan": "6201cd1d70f1670c5b31ac506e7ab2fa7b8e7f75",
"versionType": "git"
},
{
"status": "affected",
"version": "8f840e47f190cbe61a96945c13e9551048d42cef",
"lessThan": "bd0e9289e2642f6a5c54faad304ce0f41e926d22",
"versionType": "git"
}
],
"programFiles": [
"net/sctp/associola.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.7"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.7",
"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": "6.6.151",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.103",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.44",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.8",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/sctp/associola.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-74469
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #33163 · Revision 1
- Added to Heist Feed
- Publisher date