CVE-2026-74282
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)
tipc: prevent snt_unacked underflow on CONN_ACK
In the Linux kernel, the following vulnerability has been resolved: tipc: prevent snt_unacked underflow on CONN_ACK tipc_sk_conn_proto_rcv() subtracts the peer-supplied connection ack count from the unsigned 16-bit send counter snt_unacked without checking that it does not exceed the number of messages actually outstanding: tsk->snt_unacked -= msg_conn_ack(hdr); msg_conn_ack() is read straight from a received CONN_MANAGER/CONN_ACK message. If the ack count is larger than snt_unacked, the subtraction wraps to a near-maximum value, leaving tsk_conn_cong() permanently true and starving the connection of further transmits. Validate the ACK count at the start of the CONN_ACK block and drop the message if it acknowledges more messages than are outstanding. A peer (or, for a local connection, the connected peer socket) can otherwise wedge a TIPC connection's send side by sending an oversized connection ack.
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) |
|---|---|---|---|---|---|
| 10724cc7bb7832b482df049c20fd824d928c5eaa | affected | git | 3388145d258cf2c4c98278e3987296007d30672e | Unavailable | None listed |
| 10724cc7bb7832b482df049c20fd824d928c5eaa | affected | git | 67e55b054bf8025658dc0e255057f2a6236416bd | Unavailable | None listed |
| 10724cc7bb7832b482df049c20fd824d928c5eaa | affected | git | 96f91b8ae1a489b3eca137e7acf42cf985fb8939 | Unavailable | None listed |
| 10724cc7bb7832b482df049c20fd824d928c5eaa | affected | git | 47ed873e4ceda34098bd46d8e96b4bb13cad3a04 | Unavailable | None listed |
| 10724cc7bb7832b482df049c20fd824d928c5eaa | affected | git | b44bebdd32c9ff66ee2aebfc317ced44bedd9335 | Unavailable | None listed |
| 10724cc7bb7832b482df049c20fd824d928c5eaa | affected | git | 3cfa3d8e0dc167850edeb5bf5a07757db83fd54e | Unavailable | None listed |
| 10724cc7bb7832b482df049c20fd824d928c5eaa | affected | git | 1e2c956745777e6ffdee7f30da5935741c03ee1e | Unavailable | None listed |
| 10724cc7bb7832b482df049c20fd824d928c5eaa | affected | git | ab3e10b44ba5411779aac7afd2477917dd77750f | 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) |
|---|---|---|---|---|---|
| 4.7 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 4.7 | Unavailable | None listed |
| 5.10.261 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.212 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.178 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.145 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.97 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.40 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.1.5 | unaffected | semver | Unavailable | 7.1.* | None listed |
| 7.2 | unaffected | original_commit_for_fix | Unavailable | * | None listed |