CVE-2026-68123
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)
openvswitch: fix GSO userspace truncation underflow
In the Linux kernel, the following vulnerability has been resolved: openvswitch: fix GSO userspace truncation underflow OVS_ACTION_ATTR_TRUNC currently stores a delta from the original skb length in OVS_CB(skb)->cutlen. When a later userspace action segments a GSO skb, queue_gso_packets() reuses that delta for each smaller segment. A segment can then reach queue_userspace_packet() with cutlen greater than skb->len, underflowing the length passed to skb_zerocopy(). Store the maximum preserved length instead and bound each consumer against the current skb length. Use U32_MAX as the no-truncation sentinel so the value remains valid if skb geometry changes before a consumer handles it.
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) |
|---|---|---|---|---|---|
| f2a4d086ed4c588d32fe9b7aa67fead7280e7bf1 | affected | git | 50a6a85f3d6b1d22d8436848606cdef5d2c490b4 | Unavailable | None listed |
| f2a4d086ed4c588d32fe9b7aa67fead7280e7bf1 | affected | git | 2623c48cc3a8da9a1886fd8f65c0e348f4406fd6 | Unavailable | None listed |
| f2a4d086ed4c588d32fe9b7aa67fead7280e7bf1 | affected | git | e211b081901ffca76674082c73eeaed53524c369 | Unavailable | None listed |
| f2a4d086ed4c588d32fe9b7aa67fead7280e7bf1 | affected | git | a16eaaf7c0b0ccdef6166707d90ffbc6eebf6855 | Unavailable | None listed |
| f2a4d086ed4c588d32fe9b7aa67fead7280e7bf1 | affected | git | fbfa3ad2ad6f3a5624aba5211c46290fb98cc9dc | Unavailable | None listed |
| f2a4d086ed4c588d32fe9b7aa67fead7280e7bf1 | affected | git | 100a23b1613e9218e0af654ef102352c713f0263 | Unavailable | None listed |
| f2a4d086ed4c588d32fe9b7aa67fead7280e7bf1 | affected | git | ea85dbcbe8d4056ecb54352f97743d138ea4c407 | Unavailable | None listed |
| f2a4d086ed4c588d32fe9b7aa67fead7280e7bf1 | affected | git | 4032f8ed10fcb84d41c508dfb04be96589f78dfe | 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 |
| 5.10.265 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.216 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.183 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.148 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.101 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.42 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.1.6 | unaffected | semver | Unavailable | 7.1.* | None listed |
| 7.2 | unaffected | original_commit_for_fix | Unavailable | * | None listed |