{"id":"DEBIAN-CVE-2023-54114","details":"In the Linux kernel, the following vulnerability has been resolved:  net: nsh: Use correct mac_offset to unwind gso skb in nsh_gso_segment()  As the call trace shows, skb_panic was caused by wrong skb-\u003emac_header in nsh_gso_segment():  invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 3 PID: 2737 Comm: syz Not tainted 6.3.0-next-20230505 #1 RIP: 0010:skb_panic+0xda/0xe0 call Trace:  skb_push+0x91/0xa0  nsh_gso_segment+0x4f3/0x570  skb_mac_gso_segment+0x19e/0x270  __skb_gso_segment+0x1e8/0x3c0  validate_xmit_skb+0x452/0x890  validate_xmit_skb_list+0x99/0xd0  sch_direct_xmit+0x294/0x7c0  __dev_queue_xmit+0x16f0/0x1d70  packet_xmit+0x185/0x210  packet_snd+0xc15/0x1170  packet_sendmsg+0x7b/0xa0  sock_sendmsg+0x14f/0x160  The root cause is: nsh_gso_segment() use skb-\u003enetwork_header - nhoff to reset mac_header in skb_gso_error_unwind() if inner-layer protocol gso fails. However, skb-\u003enetwork_header may be reset by inner-layer protocol gso function e.g. mpls_gso_segment. skb-\u003emac_header reset by the inaccurate network_header will be larger than skb headroom.  nsh_gso_segment     nhoff = skb-\u003enetwork_header - skb-\u003emac_header;     __skb_pull(skb,nsh_len)     skb_mac_gso_segment         mpls_gso_segment             skb_reset_network_header(skb);//skb-\u003enetwork_header+=nsh_len             return -EINVAL;     skb_gso_error_unwind         skb_push(skb, nsh_len);         skb-\u003emac_header = skb-\u003enetwork_header - nhoff;         // skb-\u003emac_header \u003e skb-\u003eheadroom, cause skb_push panic  Use correct mac_offset to restore mac_header and get rid of nhoff.","modified":"2026-09-15T08:47:40.337224543Z","published":"2025-12-24T13:16:13.323Z","upstream":["CVE-2023-54114"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2023-54114"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.37-1"}]}],"versions":["6.1.27-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-54114.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.3.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-54114.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.3.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-54114.json"}}],"schema_version":"1.9.0"}