{"id":"CVE-2023-54051","summary":"net: do not allow gso_size to be set to GSO_BY_FRAGS","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: do not allow gso_size to be set to GSO_BY_FRAGS\n\nOne missing check in virtio_net_hdr_to_skb() allowed\nsyzbot to crash kernels again [1]\n\nDo not allow gso_size to be set to GSO_BY_FRAGS (0xffff),\nbecause this magic value is used by the kernel.\n\n[1]\ngeneral protection fault, probably for non-canonical address 0xdffffc000000000e: 0000 [#1] PREEMPT SMP KASAN\nKASAN: null-ptr-deref in range [0x0000000000000070-0x0000000000000077]\nCPU: 0 PID: 5039 Comm: syz-executor401 Not tainted 6.5.0-rc5-next-20230809-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023\nRIP: 0010:skb_segment+0x1a52/0x3ef0 net/core/skbuff.c:4500\nCode: 00 00 00 e9 ab eb ff ff e8 6b 96 5d f9 48 8b 84 24 00 01 00 00 48 8d 78 70 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 \u003c0f\u003e b6 04 02 84 c0 74 08 3c 03 0f 8e ea 21 00 00 48 8b 84 24 00 01\nRSP: 0018:ffffc90003d3f1c8 EFLAGS: 00010202\nRAX: dffffc0000000000 RBX: 000000000001fffe RCX: 0000000000000000\nRDX: 000000000000000e RSI: ffffffff882a3115 RDI: 0000000000000070\nRBP: ffffc90003d3f378 R08: 0000000000000005 R09: 000000000000ffff\nR10: 000000000000ffff R11: 5ee4a93e456187d6 R12: 000000000001ffc6\nR13: dffffc0000000000 R14: 0000000000000008 R15: 000000000000ffff\nFS: 00005555563f2380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000000020020000 CR3: 000000001626d000 CR4: 00000000003506f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n\u003cTASK\u003e\nudp6_ufo_fragment+0x9d2/0xd50 net/ipv6/udp_offload.c:109\nipv6_gso_segment+0x5c4/0x17b0 net/ipv6/ip6_offload.c:120\nskb_mac_gso_segment+0x292/0x610 net/core/gso.c:53\n__skb_gso_segment+0x339/0x710 net/core/gso.c:124\nskb_gso_segment include/net/gso.h:83 [inline]\nvalidate_xmit_skb+0x3a5/0xf10 net/core/dev.c:3625\n__dev_queue_xmit+0x8f0/0x3d60 net/core/dev.c:4329\ndev_queue_xmit include/linux/netdevice.h:3082 [inline]\npacket_xmit+0x257/0x380 net/packet/af_packet.c:276\npacket_snd net/packet/af_packet.c:3087 [inline]\npacket_sendmsg+0x24c7/0x5570 net/packet/af_packet.c:3119\nsock_sendmsg_nosec net/socket.c:727 [inline]\nsock_sendmsg+0xd9/0x180 net/socket.c:750\n____sys_sendmsg+0x6ac/0x940 net/socket.c:2496\n___sys_sendmsg+0x135/0x1d0 net/socket.c:2550\n__sys_sendmsg+0x117/0x1e0 net/socket.c:2579\ndo_syscall_x64 arch/x86/entry/common.c:50 [inline]\ndo_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80\nentry_SYSCALL_64_after_hwframe+0x63/0xcd\nRIP: 0033:0x7ff27cdb34d9","modified":"2026-04-02T09:45:32.668309Z","published":"2025-12-24T12:23:01.043Z","related":["SUSE-SU-2026:0263-1","SUSE-SU-2026:0278-1","SUSE-SU-2026:0281-1","SUSE-SU-2026:0293-1","SUSE-SU-2026:0315-1","SUSE-SU-2026:0316-1","SUSE-SU-2026:0317-1","SUSE-SU-2026:0411-1","SUSE-SU-2026:0617-1","SUSE-SU-2026:20477-1","SUSE-SU-2026:20498-1","SUSE-SU-2026:20845-1","SUSE-SU-2026:20876-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/54xxx/CVE-2023-54051.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0a593e8a9d24360fbc469c5897d0791aa2f20ed3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/210ff31342ade546d8d9d0ec4d3cf9cb50ae632d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2e03a92b241102aaf490439aa1b00239f84f530f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4c9bfadb4301daaceb6c575fa6ad3bc82c152e79"},{"type":"WEB","url":"https://git.kernel.org/stable/c/578371ce0d7f67ea1e65817c04478aaab0d36b68"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a5f9e5804d239d288d983db36bbed45ed10729a0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b616be6b97688f2f2bd7c4a47ab32f27f94fb2a9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e3636862f5595b3d2f02650f7b21d39043a34f3e"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/54xxx/CVE-2023-54051.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-54051"},{"type":"PACKAGE","url":"https://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":[{"introduced":"3953c46c3ac7eef31a9935427371c6f54a22f1ba"},{"fixed":"a5f9e5804d239d288d983db36bbed45ed10729a0"},{"fixed":"4c9bfadb4301daaceb6c575fa6ad3bc82c152e79"},{"fixed":"210ff31342ade546d8d9d0ec4d3cf9cb50ae632d"},{"fixed":"0a593e8a9d24360fbc469c5897d0791aa2f20ed3"},{"fixed":"578371ce0d7f67ea1e65817c04478aaab0d36b68"},{"fixed":"2e03a92b241102aaf490439aa1b00239f84f530f"},{"fixed":"e3636862f5595b3d2f02650f7b21d39043a34f3e"},{"fixed":"b616be6b97688f2f2bd7c4a47ab32f27f94fb2a9"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-54051.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.8.0"},{"fixed":"4.14.324"}]},{"type":"ECOSYSTEM","events":[{"introduced":"4.15.0"},{"fixed":"4.19.293"}]},{"type":"ECOSYSTEM","events":[{"introduced":"4.20.0"},{"fixed":"5.4.255"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.5.0"},{"fixed":"5.10.192"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.128"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.47"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.4.12"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-54051.json"}}],"schema_version":"1.7.5"}