CVE-2026-53183
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
mptcp: allow subflow rcv wnd to shrink
In the Linux kernel, the following vulnerability has been resolved: mptcp: allow subflow rcv wnd to shrink In MPTCP connection, the `window` field in the TCP header refers to the MPTCP-level rcv_nxt and it's right edge should not move backward. Such constraint is enforced at DSS option generation time. At the same time, the TCP stack ensures independently that the TCP-level rcv wnd right's edge does not move backward. That in turn causes artificial inflating of the MPTCP rcv window when the incoming data is acked at the TCP level and is OoO in the MPTCP sequence space (or lands in the backlog). As a consequence, the incoming traffic can exceed the receiver rcvbuf size even when the sender is not misbehaving. Prevent such scenario forcibly allowing the TCP subflow to shrink the TCP-level rcv wnd regardless of the current netns setting.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| f3589be0c420a3137e5902d15705ced6a36f3f43 | affected | git | bf364b0f10b27679140699821f88af7f01e2a6e3 | Unavailable | None listed |
| f3589be0c420a3137e5902d15705ced6a36f3f43 | affected | git | b1fd13074f22105deec45aa02283e322733e0c2d | Unavailable | None listed |
| f3589be0c420a3137e5902d15705ced6a36f3f43 | affected | git | aa3861f40ac32706d9e97bfac76984613e278788 | Unavailable | None listed |
| f3589be0c420a3137e5902d15705ced6a36f3f43 | affected | git | 653245266913f03fcf21cbca68eed5c197a33e52 | Unavailable | None listed |
| f3589be0c420a3137e5902d15705ced6a36f3f43 | affected | git | c297a4e65c50a2b807d9309b22615080faffa8f3 | Unavailable | None listed |
| f3589be0c420a3137e5902d15705ced6a36f3f43 | affected | git | da23be77e1292cd611e736c3aa17da633d7ddce7 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 5.19 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.19 | Unavailable | None listed |
| 6.1.176 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.143 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.94 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.36 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.0.13 | unaffected | semver | Unavailable | 7.0.* | None listed |
| 7.1 | unaffected | original_commit_for_fix | Unavailable | * | None listed |