CVE-2026-98255
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)
tcp: exclude old ACKs from tcp fast path
In the Linux kernel, the following vulnerability has been resolved: tcp: exclude old ACKs from tcp fast path Exclude old ACKs before SND.UNA from the tcp fast path as well as ACKs after SND.NXT. Such ACKs will fall through to the slow path, where tcp_ack() performs the appropriate validation and challenge ACK handling according to RFC5961 and Commit 3d501dd326fb1c7 ("tcp: do not accept ACK of bytes we never sent"). This prevents old ACKs from being accepted or modifying connection state as part of the fast path before appropriate ACK validation is applied. In particular, this prevents payload carried by a segment with an excessively old ACK from advancing RCV.NXT before the ACK is rejected.
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) |
|---|---|---|---|---|---|
| 31770e34e43d6c8dee129bfee77e56c34e61f0e5 | affected | git | 07cacab90290f795bad2e566790f4ba8e84cdf5f | Unavailable | None listed |
| 31770e34e43d6c8dee129bfee77e56c34e61f0e5 | affected | git | 6eb9b697f50b73b9684e466c1e97f4ca8e947a59 | Unavailable | None listed |
| 31770e34e43d6c8dee129bfee77e56c34e61f0e5 | affected | git | b86e1e5a4bbcbbccde8b7a3d3486604b581f6628 | Unavailable | None listed |
| 31770e34e43d6c8dee129bfee77e56c34e61f0e5 | affected | git | 1c8448db5cf35a13d82b0c9004ffdb49358883e7 | Unavailable | None listed |
| 31770e34e43d6c8dee129bfee77e56c34e61f0e5 | affected | git | 8309dc2cc360056aa9cd2acfbfc25930798c3b66 | Unavailable | None listed |
| 31770e34e43d6c8dee129bfee77e56c34e61f0e5 | affected | git | ff037920c688ae6ca1153fec01e90e6782712455 | Unavailable | None listed |
| 31770e34e43d6c8dee129bfee77e56c34e61f0e5 | affected | git | 8205ac5ddb42a1843fa8d6a8c295b5c7f4f8c6ed | Unavailable | None listed |
| 31770e34e43d6c8dee129bfee77e56c34e61f0e5 | affected | git | f81e6c3fb06327bc49cdd6e559845293ba06a704 | 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) |
|---|---|---|---|---|---|
| 4.14 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 4.14 | Unavailable | None listed |
| 5.10.271 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.222 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.189 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.158 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.112 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.54 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.2.8 | unaffected | semver | Unavailable | 7.2.* | None listed |
| 7.3 | unaffected | original_commit_for_fix | Unavailable | * | None listed |