CVE-2026-23154
- Source
- https://cve.org/CVERecord?id=CVE-2026-23154
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-23154.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2026-23154
- Downstream
- Related
- Published
- 2026-02-14T16:01:21Z
- Modified
- 2026-09-09T03:30:38Z
- Summary
- net: fix segmentation of forwarding fraglist GRO
- Details
-
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.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23154.json" }- References
-
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
- https://git.kernel.org/stable/c/2cbef9ea5a0ac51863ede35c45f26931a85d3888
- https://git.kernel.org/stable/c/3d48d59235c494d34e32052f768393111c0806ef
- https://git.kernel.org/stable/c/3e62db1e3140449608975e29e0979cc5f3b1cc07
- https://git.kernel.org/stable/c/426ca15c7f6cb6562a081341ca88893a50c59fa2
- https://git.kernel.org/stable/c/9122d7280b2303e835cdfec156bd932ac1f586ed
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23154.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-23154
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced9fd1ff5d2ac7181844735806b0a703c942365291Fixed9122d7280b2303e835cdfec156bd932ac1f586edFixed2cbef9ea5a0ac51863ede35c45f26931a85d3888Fixed3e62db1e3140449608975e29e0979cc5f3b1cc07Fixed3d48d59235c494d34e32052f768393111c0806efFixed426ca15c7f6cb6562a081341ca88893a50c59fa2