{ "schema_version": "1.6.1", "id": "RPI-CVE-2023-52435", "modified": "2026-10-07T17:22:01Z", "upstream": [ "CVE-2023-52435" ], "published": "2024-02-20T18:14:56Z", "summary": "net: prevent mss overflow in skb_segment()", "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: prevent mss overflow in skb_segment()\n\nOnce again syzbot is able to crash the kernel in skb_segment() [1]\n\nGSO_BY_FRAGS is a forbidden value, but unfortunately the following\ncomputation in skb_segment() can reach it quite easily :\n\n\tmss = mss * partial_segs;\n\n65535 = 3 * 5 * 17 * 257, so many initial values of mss can lead to\na bad final result.\n\nMake sure to limit segmentation so that the new mss value is smaller\nthan GSO_BY_FRAGS.\n\n[1]\n\ngeneral protection fault, probably for non-canonical address 0xdffffc000000000e: 0000 [#1] PREEMPT SMP KASAN\nKASAN: null-ptr-deref in range [0x0000000000000070-0x0000000000000077]\nCPU: 1 PID: 5079 Comm: syz-executor993 Not tainted 6.7.0-rc4-syzkaller-00141-g1ae4cd3cbdd0 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023\nRIP: 0010:skb_segment+0x181d/0x3f30 net/core/skbuff.c:4551\nCode: 83 e3 02 e9 fb ed ff ff e8 90 68 1c f9 48 8b 84 24 f8 00 00 00 48 8d 78 70 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 8a 21 00 00 48 8b 84 24 f8 00\nRSP: 0018:ffffc900043473d0 EFLAGS: 00010202\nRAX: dffffc0000000000 RBX: 0000000000010046 RCX: ffffffff886b1597\nRDX: 000000000000000e RSI: ffffffff886b2520 RDI: 0000000000000070\nRBP: ffffc90004347578 R08: 0000000000000005 R09: 000000000000ffff\nR10: 000000000000ffff R11: 0000000000000002 R12: ffff888063202ac0\nR13: 0000000000010000 R14: 000000000000ffff R15: 0000000000000046\nFS: 0000555556e7e380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000000020010000 CR3: 0000000027ee2000 CR4: 00000000003506f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n\nudp6_ufo_fragment+0xa0e/0xd00 net/ipv6/udp_offload.c:109\nipv6_gso_segment+0x534/0x17e0 net/ipv6/ip6_offload.c:120\nskb_mac_gso_segment+0x290/0x610 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+0x36c/0xeb0 net/core/dev.c:3626\n__dev_queue_xmit+0x6f3/0x3d60 net/core/dev.c:4338\ndev_queue_xmit include/linux/netdevice.h:3134 [inline]\npacket_xmit+0x257/0x380 net/packet/af_packet.c:276\npacket_snd net/packet/af_packet.c:3087 [inline]\npacket_sendmsg+0x24c6/0x5220 net/packet/af_packet.c:3119\nsock_sendmsg_nosec net/socket.c:730 [inline]\n__sock_sendmsg+0xd5/0x180 net/socket.c:745\n__sys_sendto+0x255/0x340 net/socket.c:2190\n__do_sys_sendto net/socket.c:2202 [inline]\n__se_sys_sendto net/socket.c:2198 [inline]\n__x64_sys_sendto+0xe0/0x1b0 net/socket.c:2198\ndo_syscall_x64 arch/x86/entry/common.c:52 [inline]\ndo_syscall_64+0x40/0x110 arch/x86/entry/common.c:83\nentry_SYSCALL_64_after_hwframe+0x63/0x6b\nRIP: 0033:0x7f8692032aa9\nCode: 28 00 00 00 75 05 48 83 c4 28 c3 e8 d1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007fff8d685418 EFLAGS: 00000246 ORIG_RAX: 000000000000002c\nRAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f8692032aa9\nRDX: 0000000000010048 RSI: 00000000200000c0 RDI: 0000000000000003\nRBP: 00000000000f4240 R08: 0000000020000540 R09: 0000000000000014\nR10: 0000000000000000 R11: 0000000000000246 R12: 00007fff8d685480\nR13: 0000000000000001 R14: 00007fff8d685480 R15: 0000000000000003\n\nModules linked in:\n---[ end trace 0000000000000000 ]---\nRIP: 0010:skb_segment+0x181d/0x3f30 net/core/skbuff.c:4551\nCode: 83 e3 02 e9 fb ed ff ff e8 90 68 1c f9 48 8b 84 24 f8 00 00 00 48 8d 78 70 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 8a 21 00 00 48 8b 84 24 f8 00\nRSP: 0018:ffffc900043473d0 EFLAGS: 00010202\nRAX: dffffc0000000000 RBX: 0000000000010046 RCX: ffffffff886b1597\nRDX: 000000000000000e RSI: ffffffff886b2520 RDI: 0000000000000070\nRBP: ffffc90004347578 R0\n---truncated---", "affected": [ { "package": { "ecosystem": "Raspberry Pi OS:12", "name": "linux" }, "versions": [ "1:6.1.21-1+rpt1", "1:6.1.47-1+rpt2", "1:6.1.47-1+rpt4", "1:6.1.54-1+rpt2", "1:6.1.58-1+rpt2", "1:6.1.63-1+rpt1", "1:6.1.73-1+rpt1" ], "ecosystem_specific": { "binaries": [ { "binary_name": "linux-image-6.1.0-rpi1-rpi-v6", "binary_version": "1:6.1.21-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi1-rpi-v7", "binary_version": "1:6.1.21-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi1-rpi-v7l", "binary_version": "1:6.1.21-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi1-rpi-v8", "binary_version": "1:6.1.21-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi2-rpi-v6", "binary_version": "1:6.1.47-1+rpt2" }, { "binary_name": "linux-image-6.1.0-rpi2-rpi-v7", "binary_version": "1:6.1.47-1+rpt2" }, { "binary_name": "linux-image-6.1.0-rpi2-rpi-v7l", "binary_version": "1:6.1.47-1+rpt2" }, { "binary_name": "linux-image-6.1.0-rpi2-rpi-v8", "binary_version": "1:6.1.47-1+rpt2" }, { "binary_name": "linux-image-6.1.0-rpi3-rpi-2712", "binary_version": "1:6.1.47-1+rpt4" }, { "binary_name": "linux-image-6.1.0-rpi3-rpi-v6", "binary_version": "1:6.1.47-1+rpt4" }, { "binary_name": "linux-image-6.1.0-rpi3-rpi-v7", "binary_version": "1:6.1.47-1+rpt4" }, { "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l", "binary_version": "1:6.1.47-1+rpt4" }, { "binary_name": "linux-image-6.1.0-rpi3-rpi-v8", "binary_version": "1:6.1.47-1+rpt4" }, { "binary_name": "linux-image-6.1.0-rpi4-rpi-2712", "binary_version": "1:6.1.54-1+rpt2" }, { "binary_name": "linux-image-6.1.0-rpi4-rpi-v6", "binary_version": "1:6.1.54-1+rpt2" }, { "binary_name": "linux-image-6.1.0-rpi4-rpi-v7", "binary_version": "1:6.1.54-1+rpt2" }, { "binary_name": "linux-image-6.1.0-rpi4-rpi-v7l", "binary_version": "1:6.1.54-1+rpt2" }, { "binary_name": "linux-image-6.1.0-rpi4-rpi-v8", "binary_version": "1:6.1.54-1+rpt2" }, { "binary_name": "linux-image-6.1.0-rpi6-rpi-2712", "binary_version": "1:6.1.58-1+rpt2" }, { "binary_name": "linux-image-6.1.0-rpi6-rpi-v6", "binary_version": "1:6.1.58-1+rpt2" }, { "binary_name": "linux-image-6.1.0-rpi6-rpi-v7", "binary_version": "1:6.1.58-1+rpt2" }, { "binary_name": "linux-image-6.1.0-rpi6-rpi-v7l", "binary_version": "1:6.1.58-1+rpt2" }, { "binary_name": "linux-image-6.1.0-rpi6-rpi-v8", "binary_version": "1:6.1.58-1+rpt2" }, { "binary_name": "linux-image-6.1.0-rpi7-rpi-2712", "binary_version": "1:6.1.63-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi7-rpi-v6", "binary_version": "1:6.1.63-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi7-rpi-v7", "binary_version": "1:6.1.63-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi7-rpi-v7l", "binary_version": "1:6.1.63-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi7-rpi-v8", "binary_version": "1:6.1.63-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi8-rpi-2712", "binary_version": "1:6.1.73-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi8-rpi-v6", "binary_version": "1:6.1.73-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi8-rpi-v7", "binary_version": "1:6.1.73-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi8-rpi-v7l", "binary_version": "1:6.1.73-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi8-rpi-v8", "binary_version": "1:6.1.73-1+rpt1" } ] }, "database_specific": { "per_version": { "1:6.1.21-1+rpt1": { "linux_commit": "0afb5e98488aed7017b9bf321b575d0177feb7ed", "upstream_version": "6.1.21", "assessment": "commit ancestry (strak rule)", "upstream_fixed": "6.1.79" }, "1:6.1.47-1+rpt2": { "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e", "upstream_version": "6.1.47", "assessment": "commit ancestry (strak rule)", "upstream_fixed": "6.1.79" }, "1:6.1.47-1+rpt4": { "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e", "upstream_version": "6.1.47", "assessment": "commit ancestry (strak rule)", "upstream_fixed": "6.1.79", "compiled_filter": false }, "1:6.1.54-1+rpt2": { "linux_commit": "2906f7abdc03d4a92b6b0e2e0c87ea2a9dffe8f7", "upstream_version": "6.1.54", "assessment": "commit ancestry (strak rule)", "upstream_fixed": "6.1.79" }, "1:6.1.58-1+rpt2": { "linux_commit": "ccf1586ad0663fa91238ac56abf6340d6d740d18", "upstream_version": "6.1.58", "assessment": "commit ancestry (strak rule)", "upstream_fixed": "6.1.79" }, "1:6.1.63-1+rpt1": { "linux_commit": null, "upstream_version": "6.1.63", "assessment": "upstream version (no usable Linux commit)", "upstream_fixed": "6.1.79" }, "1:6.1.73-1+rpt1": { "linux_commit": null, "upstream_version": "6.1.73", "assessment": "upstream version (no usable Linux commit)", "upstream_fixed": "6.1.79" } } } } ], "references": [ { "type": "ADVISORY", "url": "https://www.cve.org/CVERecord?id=CVE-2023-52435" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/0d3ffbbf8631d6db0552f46250015648991c856f" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/cd1022eaf87be8e6151435bd4df4c242c347e083" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/8f8f185643747fbb448de6aab0efa51c679909a3" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/6c53e8547687d9c767c139cd4b50af566f58c29a" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/989b0ff35fe5fc9652ee5bafbe8483db6f27b137" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/95b3904a261a9f810205da560e802cc326f50d77" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/23d05d563b7e7b0314e65c8e882bc27eac2da8e7" } ], "database_specific": { "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git", "upstream_modified": "2026-05-12T04:54:46Z" } }