CVE-2026-23254
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)
net: gro: fix outer network offset
In the Linux kernel, the following vulnerability has been resolved: net: gro: fix outer network offset The udp GRO complete stage assumes that all the packets inserted the RX have the `encapsulation` flag zeroed. Such assumption is not true, as a few H/W NICs can set such flag when H/W offloading the checksum for an UDP encapsulated traffic, the tun driver can inject GSO packets with UDP encapsulation and the problematic layout can also be created via a veth based setup. Due to the above, in the problematic scenarios, udp4_gro_complete() uses the wrong network offset (inner instead of outer) to compute the outer UDP header pseudo checksum, leading to csum validation errors later on in packet processing. Address the issue always clearing the encapsulation flag at GRO completion time. Such flag will be set again as needed for encapsulated packets by udp_gro_complete().
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) |
|---|---|---|---|---|---|
| af276a5ac8e938c8b058e3e124073cc1e322d98b | affected | git | 9d40a85138568696387ef04cd004c64612a70874 | Unavailable | None listed |
| 5ef31ea5d053a8f493a772ebad3f3ce82c35d845 | affected | git | b83557bc6f560433fe5d727e241069f8db5ba709 | Unavailable | None listed |
| 5ef31ea5d053a8f493a772ebad3f3ce82c35d845 | affected | git | 2e5edb69e5d0e23ef248c56fc977039268c77a7b | Unavailable | None listed |
| 5ef31ea5d053a8f493a772ebad3f3ce82c35d845 | affected | git | 5c2c3c38be396257a6a2e55bd601a12bb9781507 | Unavailable | None listed |
| dbd9466d323a72e22efe09151253d195d36d3bf6 | affected | git | Unavailable | Unavailable | None listed |
| 6.6.31 | affected | semver | 6.6.124 | Unavailable | None listed |
| 6.8.10 | affected | semver | 6.9 | 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) |
|---|---|---|---|---|---|
| 6.9 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 6.9 | Unavailable | None listed |
| 6.6.124 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.70 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.10 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 6.19 | unaffected | original_commit_for_fix | Unavailable | * | None listed |