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cvelist/2024/26xxx/CVE-2024-26635.json

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{
"-Synchronized-Data."
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"data_version": "4.0",
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"data_type": "CVE",
"data_format": "MITRE",
"CVE_data_meta": {
"ID": "CVE-2024-26635",
"-Synchronized-Data."
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"ASSIGNER": "cve@kernel.org",
"STATE": "PUBLIC"
"-Synchronized-Data."
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},
"description": {
"description_data": [
{
"lang": "eng",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nllc: Drop support for ETH_P_TR_802_2.\n\nsyzbot reported an uninit-value bug below. [0]\n\nllc supports ETH_P_802_2 (0x0004) and used to support ETH_P_TR_802_2\n(0x0011), and syzbot abused the latter to trigger the bug.\n\n write$tun(r0, &(0x7f0000000040)={@val={0x0, 0x11}, @val, @mpls={[], @llc={@snap={0xaa, 0x1, ')', \"90e5dd\"}}}}, 0x16)\n\nllc_conn_handler() initialises local variables {saddr,daddr}.mac\nbased on skb in llc_pdu_decode_sa()/llc_pdu_decode_da() and passes\nthem to __llc_lookup().\n\nHowever, the initialisation is done only when skb->protocol is\nhtons(ETH_P_802_2), otherwise, __llc_lookup_established() and\n__llc_lookup_listener() will read garbage.\n\nThe missing initialisation existed prior to commit 211ed865108e\n(\"net: delete all instances of special processing for token ring\").\n\nIt removed the part to kick out the token ring stuff but forgot to\nclose the door allowing ETH_P_TR_802_2 packets to sneak into llc_rcv().\n\nLet's remove llc_tr_packet_type and complete the deprecation.\n\n[0]:\nBUG: KMSAN: uninit-value in __llc_lookup_established+0xe9d/0xf90\n __llc_lookup_established+0xe9d/0xf90\n __llc_lookup net/llc/llc_conn.c:611 [inline]\n llc_conn_handler+0x4bd/0x1360 net/llc/llc_conn.c:791\n llc_rcv+0xfbb/0x14a0 net/llc/llc_input.c:206\n __netif_receive_skb_one_core net/core/dev.c:5527 [inline]\n __netif_receive_skb+0x1a6/0x5a0 net/core/dev.c:5641\n netif_receive_skb_internal net/core/dev.c:5727 [inline]\n netif_receive_skb+0x58/0x660 net/core/dev.c:5786\n tun_rx_batched+0x3ee/0x980 drivers/net/tun.c:1555\n tun_get_user+0x53af/0x66d0 drivers/net/tun.c:2002\n tun_chr_write_iter+0x3af/0x5d0 drivers/net/tun.c:2048\n call_write_iter include/linux/fs.h:2020 [inline]\n new_sync_write fs/read_write.c:491 [inline]\n vfs_write+0x8ef/0x1490 fs/read_write.c:584\n ksys_write+0x20f/0x4c0 fs/read_write.c:637\n __do_sys_write fs/read_write.c:649 [inline]\n __se_sys_write fs/read_write.c:646 [inline]\n __x64_sys_write+0x93/0xd0 fs/read_write.c:646\n do_syscall_x64 arch/x86/entry/common.c:51 [inline]\n do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82\n entry_SYSCALL_64_after_hwframe+0x63/0x6b\n\nLocal variable daddr created at:\n llc_conn_handler+0x53/0x1360 net/llc/llc_conn.c:783\n llc_rcv+0xfbb/0x14a0 net/llc/llc_input.c:206\n\nCPU: 1 PID: 5004 Comm: syz-executor994 Not tainted 6.6.0-syzkaller-14500-g1c41041124bd #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023"
}
]
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "n/a"
}
]
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}
]
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},
"affects": {
"vendor": {
"vendor_data": [
{
"vendor_name": "Linux",
"product": {
"product_data": [
{
"product_name": "Linux",
"version": {
"version_data": [
{
"version_affected": "<",
"version_name": "211ed865108e",
"version_value": "165ad1e22779"
},
{
"version_value": "not down converted",
"x_cve_json_5_version_data": {
"versions": [
{
"version": "3.5",
"status": "affected"
},
{
"version": "0",
"lessThan": "3.5",
"status": "unaffected",
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"versionType": "semver"
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},
{
"version": "4.19.307",
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"-Synchronized-Data."
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"versionType": "semver"
"-Synchronized-Data."
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},
{
"version": "5.4.269",
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"-Synchronized-Data."
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"versionType": "semver"
"-Synchronized-Data."
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},
{
"version": "5.10.210",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"-Synchronized-Data."
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"versionType": "semver"
"-Synchronized-Data."
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},
{
"version": "5.15.149",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"-Synchronized-Data."
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"versionType": "semver"
"-Synchronized-Data."
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},
{
"version": "6.1.76",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"-Synchronized-Data."
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"versionType": "semver"
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},
{
"version": "6.6.15",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"-Synchronized-Data."
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"versionType": "semver"
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},
{
"version": "6.7.3",
"lessThanOrEqual": "6.7.*",
"status": "unaffected",
"-Synchronized-Data."
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"versionType": "semver"
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},
{
"version": "6.8",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
],
"defaultStatus": "affected"
}
}
]
}
}
]
}
}
]
}
},
"references": {
"reference_data": [
{
"url": "https://git.kernel.org/stable/c/165ad1e22779685c3ed3dd349c6c4c632309cc62",
"refsource": "MISC",
"name": "https://git.kernel.org/stable/c/165ad1e22779685c3ed3dd349c6c4c632309cc62"
},
{
"url": "https://git.kernel.org/stable/c/b8e8838f82f332ae80c643dbb1ca4418d0628097",
"refsource": "MISC",
"name": "https://git.kernel.org/stable/c/b8e8838f82f332ae80c643dbb1ca4418d0628097"
},
{
"url": "https://git.kernel.org/stable/c/9ccdef19cf9497c2803b005369668feb91cacdfd",
"refsource": "MISC",
"name": "https://git.kernel.org/stable/c/9ccdef19cf9497c2803b005369668feb91cacdfd"
},
{
"url": "https://git.kernel.org/stable/c/c0fe2fe7a5a291dfcf6dc64301732c8d3dc6a828",
"refsource": "MISC",
"name": "https://git.kernel.org/stable/c/c0fe2fe7a5a291dfcf6dc64301732c8d3dc6a828"
},
{
"url": "https://git.kernel.org/stable/c/660c3053d992b68fee893a0e9ec9159228cffdc6",
"refsource": "MISC",
"name": "https://git.kernel.org/stable/c/660c3053d992b68fee893a0e9ec9159228cffdc6"
},
{
"url": "https://git.kernel.org/stable/c/f1f34a515fb1e25e85dee94f781e7869ae351fb8",
"refsource": "MISC",
"name": "https://git.kernel.org/stable/c/f1f34a515fb1e25e85dee94f781e7869ae351fb8"
},
{
"url": "https://git.kernel.org/stable/c/df57fc2f2abf548aa889a36ab0bdcc94a75399dc",
"refsource": "MISC",
"name": "https://git.kernel.org/stable/c/df57fc2f2abf548aa889a36ab0bdcc94a75399dc"
},
{
"url": "https://git.kernel.org/stable/c/e3f9bed9bee261e3347131764e42aeedf1ffea61",
"refsource": "MISC",
"name": "https://git.kernel.org/stable/c/e3f9bed9bee261e3347131764e42aeedf1ffea61"
}
]
},
"generator": {
"-Synchronized-Data."
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"engine": "bippy-9e1c9544281a"
"-Synchronized-Data."
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}
}
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