{ "data_version": "4.0", "data_type": "CVE", "data_format": "MITRE", "CVE_data_meta": { "ID": "CVE-2024-26636", "ASSIGNER": "cve@kernel.org", "STATE": "PUBLIC" }, "description": { "description_data": [ { "lang": "eng", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nllc: make llc_ui_sendmsg() more robust against bonding changes\n\nsyzbot was able to trick llc_ui_sendmsg(), allocating an skb with no\nheadroom, but subsequently trying to push 14 bytes of Ethernet header [1]\n\nLike some others, llc_ui_sendmsg() releases the socket lock before\ncalling sock_alloc_send_skb().\nThen it acquires it again, but does not redo all the sanity checks\nthat were performed.\n\nThis fix:\n\n- Uses LL_RESERVED_SPACE() to reserve space.\n- Check all conditions again after socket lock is held again.\n- Do not account Ethernet header for mtu limitation.\n\n[1]\n\nskbuff: skb_under_panic: text:ffff800088baa334 len:1514 put:14 head:ffff0000c9c37000 data:ffff0000c9c36ff2 tail:0x5dc end:0x6c0 dev:bond0\n\n kernel BUG at net/core/skbuff.c:193 !\nInternal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP\nModules linked in:\nCPU: 0 PID: 6875 Comm: syz-executor.0 Not tainted 6.7.0-rc8-syzkaller-00101-g0802e17d9aca-dirty #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023\npstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n pc : skb_panic net/core/skbuff.c:189 [inline]\n pc : skb_under_panic+0x13c/0x140 net/core/skbuff.c:203\n lr : skb_panic net/core/skbuff.c:189 [inline]\n lr : skb_under_panic+0x13c/0x140 net/core/skbuff.c:203\nsp : ffff800096f97000\nx29: ffff800096f97010 x28: ffff80008cc8d668 x27: dfff800000000000\nx26: ffff0000cb970c90 x25: 00000000000005dc x24: ffff0000c9c36ff2\nx23: ffff0000c9c37000 x22: 00000000000005ea x21: 00000000000006c0\nx20: 000000000000000e x19: ffff800088baa334 x18: 1fffe000368261ce\nx17: ffff80008e4ed000 x16: ffff80008a8310f8 x15: 0000000000000001\nx14: 1ffff00012df2d58 x13: 0000000000000000 x12: 0000000000000000\nx11: 0000000000000001 x10: 0000000000ff0100 x9 : e28a51f1087e8400\nx8 : e28a51f1087e8400 x7 : ffff80008028f8d0 x6 : 0000000000000000\nx5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff800082b78714\nx2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000089\nCall trace:\n skb_panic net/core/skbuff.c:189 [inline]\n skb_under_panic+0x13c/0x140 net/core/skbuff.c:203\n skb_push+0xf0/0x108 net/core/skbuff.c:2451\n eth_header+0x44/0x1f8 net/ethernet/eth.c:83\n dev_hard_header include/linux/netdevice.h:3188 [inline]\n llc_mac_hdr_init+0x110/0x17c net/llc/llc_output.c:33\n llc_sap_action_send_xid_c+0x170/0x344 net/llc/llc_s_ac.c:85\n llc_exec_sap_trans_actions net/llc/llc_sap.c:153 [inline]\n llc_sap_next_state net/llc/llc_sap.c:182 [inline]\n llc_sap_state_process+0x1ec/0x774 net/llc/llc_sap.c:209\n llc_build_and_send_xid_pkt+0x12c/0x1c0 net/llc/llc_sap.c:270\n llc_ui_sendmsg+0x7bc/0xb1c net/llc/af_llc.c:997\n sock_sendmsg_nosec net/socket.c:730 [inline]\n __sock_sendmsg net/socket.c:745 [inline]\n sock_sendmsg+0x194/0x274 net/socket.c:767\n splice_to_socket+0x7cc/0xd58 fs/splice.c:881\n do_splice_from fs/splice.c:933 [inline]\n direct_splice_actor+0xe4/0x1c0 fs/splice.c:1142\n splice_direct_to_actor+0x2a0/0x7e4 fs/splice.c:1088\n do_splice_direct+0x20c/0x348 fs/splice.c:1194\n do_sendfile+0x4bc/0xc70 fs/read_write.c:1254\n __do_sys_sendfile64 fs/read_write.c:1322 [inline]\n __se_sys_sendfile64 fs/read_write.c:1308 [inline]\n __arm64_sys_sendfile64+0x160/0x3b4 fs/read_write.c:1308\n __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline]\n invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51\n el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136\n do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155\n el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678\n el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696\n el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595\nCode: aa1803e6 aa1903e7 a90023f5 94792f6a (d4210000)" } ] }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "eng", "value": "n/a" } ] } ] }, "affects": { "vendor": { "vendor_data": [ { "vendor_name": "Linux", "product": { "product_data": [ { "product_name": "Linux", "version": { "version_data": [ { "version_affected": "<", "version_name": "1da177e4c3f4", "version_value": "84e9d10419f6" }, { "version_value": "not down converted", "x_cve_json_5_version_data": { "versions": [ { "version": "2.6.12", "status": "affected" }, { "version": "0", "lessThan": "2.6.12", "status": "unaffected", "versionType": "custom" }, { "version": "4.19.307", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.4.269", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.10.210", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.15.149", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.1.76", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.6.15", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.7.3", "lessThanOrEqual": "6.7.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.8", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ], "defaultStatus": "affected" } } ] } } ] } } ] } }, "references": { "reference_data": [ { "url": "https://git.kernel.org/stable/c/84e9d10419f6f4f3f3cd8f9aaf44a48719aa4b1b", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/84e9d10419f6f4f3f3cd8f9aaf44a48719aa4b1b" }, { "url": "https://git.kernel.org/stable/c/b643d0defcbacd7fe548bc65c3e4e6f17dc5eb2d", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/b643d0defcbacd7fe548bc65c3e4e6f17dc5eb2d" }, { "url": "https://git.kernel.org/stable/c/04f2a74b562f3a7498be0399309669f342793d8c", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/04f2a74b562f3a7498be0399309669f342793d8c" }, { "url": "https://git.kernel.org/stable/c/c22044270da68881074fda81a7d34812726cb249", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/c22044270da68881074fda81a7d34812726cb249" }, { "url": "https://git.kernel.org/stable/c/6d53b813ff8b177f86f149c2f744442681f720e4", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/6d53b813ff8b177f86f149c2f744442681f720e4" }, { "url": "https://git.kernel.org/stable/c/cafd3ad3fe03ef4d6632747be9ee15dc0029db4b", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/cafd3ad3fe03ef4d6632747be9ee15dc0029db4b" }, { "url": "https://git.kernel.org/stable/c/c451c008f563d56d5e676c9dcafae565fcad84bb", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/c451c008f563d56d5e676c9dcafae565fcad84bb" }, { "url": "https://git.kernel.org/stable/c/dad555c816a50c6a6a8a86be1f9177673918c647", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/dad555c816a50c6a6a8a86be1f9177673918c647" } ] }, "generator": { "engine": "bippy-8df59b4913de" } }