CVE-2026-23069
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)
vsock/virtio: fix potential underflow in virtio_transport_get_credit()
In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: fix potential underflow in virtio_transport_get_credit() The credit calculation in virtio_transport_get_credit() uses unsigned arithmetic: ret = vvs->peer_buf_alloc - (vvs->tx_cnt - vvs->peer_fwd_cnt); If the peer shrinks its advertised buffer (peer_buf_alloc) while bytes are in flight, the subtraction can underflow and produce a large positive value, potentially allowing more data to be queued than the peer can handle. Reuse virtio_transport_has_space() which already handles this case and add a comment to make it clear why we are doing that. [Stefano: use virtio_transport_has_space() instead of duplicating the code] [Stefano: tweak the commit message]
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) |
|---|---|---|---|---|---|
| 06a8fc78367d070720af960dcecec917d3ae5f3b | affected | git | d96de882d6b99955604669d962ae14e94b66a551 | Unavailable | None listed |
| 06a8fc78367d070720af960dcecec917d3ae5f3b | affected | git | 02f9af192b98d15883c70dd41ac76d1b0217c899 | Unavailable | None listed |
| 06a8fc78367d070720af960dcecec917d3ae5f3b | affected | git | d05bc313788f0684b27f0f5b60c52a844669b542 | Unavailable | None listed |
| 06a8fc78367d070720af960dcecec917d3ae5f3b | affected | git | ec0f1b3da8061be3173d1c39faaf9504f91942c3 | Unavailable | None listed |
| 06a8fc78367d070720af960dcecec917d3ae5f3b | affected | git | 3ef3d52a1a9860d094395c7a3e593f3aa26ff012 | 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) |
|---|---|---|---|---|---|
| 4.8 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 4.8 | Unavailable | None listed |
| 6.1.162 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.122 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.68 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.8 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 6.19 | unaffected | original_commit_for_fix | Unavailable | * | None listed |