{ "data_version": "4.0", "data_type": "CVE", "data_format": "MITRE", "CVE_data_meta": { "ID": "CVE-2024-49947", "ASSIGNER": "cve@kernel.org", "STATE": "PUBLIC" }, "description": { "description_data": [ { "lang": "eng", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: test for not too small csum_start in virtio_net_hdr_to_skb()\n\nsyzbot was able to trigger this warning [1], after injecting a\nmalicious packet through af_packet, setting skb->csum_start and thus\nthe transport header to an incorrect value.\n\nWe can at least make sure the transport header is after\nthe end of the network header (with a estimated minimal size).\n\n[1]\n[ 67.873027] skb len=4096 headroom=16 headlen=14 tailroom=0\nmac=(-1,-1) mac_len=0 net=(16,-6) trans=10\nshinfo(txflags=0 nr_frags=1 gso(size=0 type=0 segs=0))\ncsum(0xa start=10 offset=0 ip_summed=3 complete_sw=0 valid=0 level=0)\nhash(0x0 sw=0 l4=0) proto=0x0800 pkttype=0 iif=0\npriority=0x0 mark=0x0 alloc_cpu=10 vlan_all=0x0\nencapsulation=0 inner(proto=0x0000, mac=0, net=0, trans=0)\n[ 67.877172] dev name=veth0_vlan feat=0x000061164fdd09e9\n[ 67.877764] sk family=17 type=3 proto=0\n[ 67.878279] skb linear: 00000000: 00 00 10 00 00 00 00 00 0f 00 00 00 08 00\n[ 67.879128] skb frag: 00000000: 0e 00 07 00 00 00 28 00 08 80 1c 00 04 00 00 02\n[ 67.879877] skb frag: 00000010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n[ 67.880647] skb frag: 00000020: 00 00 02 00 00 00 08 00 1b 00 00 00 00 00 00 00\n[ 67.881156] skb frag: 00000030: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n[ 67.881753] skb frag: 00000040: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n[ 67.882173] skb frag: 00000050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n[ 67.882790] skb frag: 00000060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n[ 67.883171] skb frag: 00000070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n[ 67.883733] skb frag: 00000080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n[ 67.884206] skb frag: 00000090: 00 00 00 00 00 00 00 00 00 00 69 70 76 6c 61 6e\n[ 67.884704] skb frag: 000000a0: 31 00 00 00 00 00 00 00 00 00 2b 00 00 00 00 00\n[ 67.885139] skb frag: 000000b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n[ 67.885677] skb frag: 000000c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n[ 67.886042] skb frag: 000000d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n[ 67.886408] skb frag: 000000e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n[ 67.887020] skb frag: 000000f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n[ 67.887384] skb frag: 00000100: 00 00\n[ 67.887878] ------------[ cut here ]------------\n[ 67.887908] offset (-6) >= skb_headlen() (14)\n[ 67.888445] WARNING: CPU: 10 PID: 2088 at net/core/dev.c:3332 skb_checksum_help (net/core/dev.c:3332 (discriminator 2))\n[ 67.889353] Modules linked in: macsec macvtap macvlan hsr wireguard curve25519_x86_64 libcurve25519_generic libchacha20poly1305 chacha_x86_64 libchacha poly1305_x86_64 dummy bridge sr_mod cdrom evdev pcspkr i2c_piix4 9pnet_virtio 9p 9pnet netfs\n[ 67.890111] CPU: 10 UID: 0 PID: 2088 Comm: b363492833 Not tainted 6.11.0-virtme #1011\n[ 67.890183] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n[ 67.890309] RIP: 0010:skb_checksum_help (net/core/dev.c:3332 (discriminator 2))\n[ 67.891043] Call Trace:\n[ 67.891173] \n[ 67.891274] ? __warn (kernel/panic.c:741)\n[ 67.891320] ? skb_checksum_help (net/core/dev.c:3332 (discriminator 2))\n[ 67.891333] ? report_bug (lib/bug.c:180 lib/bug.c:219)\n[ 67.891348] ? handle_bug (arch/x86/kernel/traps.c:239)\n[ 67.891363] ? exc_invalid_op (arch/x86/kernel/traps.c:260 (discriminator 1))\n[ 67.891372] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621)\n[ 67.891388] ? skb_checksum_help (net/core/dev.c:3332 (discriminator 2))\n[ 67.891399] ? skb_checksum_help (net/core/dev.c:3332 (discriminator 2))\n[ 67.891416] ip_do_fragment (net/ipv4/ip_output.c:777 (discriminator 1))\n[ 67.891448] ? __ip_local_out (./include/linux/skbuff.h:1146 ./include/net/l3mdev.h:196 ./include/net/l3mdev.h:213 ne\n---truncated---" } ] }, "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": "342c88f406c2", "version_value": "d9dfd41e32cc" }, { "version_affected": "<", "version_name": "9181d6f8a2bb", "version_value": "4cc0648e9e32" }, { "version_value": "not down converted", "x_cve_json_5_version_data": { "versions": [ { "version": "6.8", "status": "affected" }, { "version": "0", "lessThan": "6.8", "status": "unaffected", "versionType": "custom" }, { "version": "6.6.55", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.10.14", "lessThanOrEqual": "6.10.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.11.3", "lessThanOrEqual": "6.11.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.12-rc2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ], "defaultStatus": "affected" } } ] } } ] } } ] } }, "references": { "reference_data": [ { "url": "https://git.kernel.org/stable/c/d9dfd41e32ccc5198033ddd1ff1516822dfefa5a", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/d9dfd41e32ccc5198033ddd1ff1516822dfefa5a" }, { "url": "https://git.kernel.org/stable/c/4cc0648e9e3240496835dc698ace1d046d8d57ea", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/4cc0648e9e3240496835dc698ace1d046d8d57ea" }, { "url": "https://git.kernel.org/stable/c/7711c419a915ee0dd91c125d2b967bbf2a72e9ac", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/7711c419a915ee0dd91c125d2b967bbf2a72e9ac" }, { "url": "https://git.kernel.org/stable/c/49d14b54a527289d09a9480f214b8c586322310a", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/49d14b54a527289d09a9480f214b8c586322310a" } ] }, "generator": { "engine": "bippy-c9c4e1df01b2" } }