net: fix segmentation of forwarding fraglist GRO
In the Linux kernel, the following vulnerability has been resolved: net: fix segmentation of forwarding fraglist GRO This patch enhances GSO segment handling by properly checking the SKB_GSO_DODGY flag for frag_list GSO packets, addressing low throughput issues observed when a station accesses IPv4 servers via hotspots with an IPv6-only upstream interface. Specifically, it fixes a bug in GSO segmentation when forwarding GRO packets containing a frag_list. The function skb_segment_list cannot correctly process GRO skbs that have been converted by XLAT, since XLAT only translates the header of the head skb. Consequently, skbs in the frag_list may remain untranslated, resulting in protocol inconsistencies and reduced throughput. To address this, the patch explicitly sets the SKB_GSO_DODGY flag for GSO packets in XLAT's IPv4/IPv6 protocol translation helpers (bpf_skb_proto_4_to_6 and bpf_skb_proto_6_to_4). This marks GSO packets as potentially modified after protocol translation. As a result, GSO segmentation will avoid using skb_segment_list and instead falls back to skb_segment for packets with the SKB_GSO_DODGY flag. This ensures that only safe and fully translated frag_list packets are processed by skb_segment_list, resolving protocol inconsistencies and improving throughput when forwarding GRO packets converted by XLAT.
CVE-2026-23154
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-23154
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "9fd1ff5d2ac7181844735806b0a703c942365291",
"lessThan": "9122d7280b2303e835cdfec156bd932ac1f586ed",
"versionType": "git"
},
{
"status": "affected",
"version": "9fd1ff5d2ac7181844735806b0a703c942365291",
"lessThan": "2cbef9ea5a0ac51863ede35c45f26931a85d3888",
"versionType": "git"
},
{
"status": "affected",
"version": "9fd1ff5d2ac7181844735806b0a703c942365291",
"lessThan": "3e62db1e3140449608975e29e0979cc5f3b1cc07",
"versionType": "git"
},
{
"status": "affected",
"version": "9fd1ff5d2ac7181844735806b0a703c942365291",
"lessThan": "3d48d59235c494d34e32052f768393111c0806ef",
"versionType": "git"
},
{
"status": "affected",
"version": "9fd1ff5d2ac7181844735806b0a703c942365291",
"lessThan": "426ca15c7f6cb6562a081341ca88893a50c59fa2",
"versionType": "git"
}
],
"programFiles": [
"net/core/filter.c",
"net/ipv4/tcp_offload.c",
"net/ipv4/udp_offload.c",
"net/ipv6/tcpv6_offload.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.6"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.6",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.167",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.130",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.69",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.9",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/core/filter.c",
"net/ipv4/tcp_offload.c",
"net/ipv4/udp_offload.c",
"net/ipv6/tcpv6_offload.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-23154
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #39771 · Revision 1
- Added to Heist Feed
- Publisher date