143 lines
6.9 KiB
JSON
143 lines
6.9 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-98240",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-09-25T10:25:14.329Z",
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"datePublished": "2026-10-06T08:45:11.284Z",
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"dateUpdated": "2026-10-19T09:16:11.863Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-10-19T09:16:11.863Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ip_tunnel: initialize `options_len` before referencing options\n\nThe following command triggers a kernel panic:\n\n ip link add d0 type dummy; ip link set d0 up\n ip route add 10.30.0.0/16 \\\n encap ip id 300 geneve_opts 4660:66:11223344 dev d0\n\n memcpy: detected buffer overflow: 4 byte write of buffer size 0\n kernel BUG at lib/string_helpers.c:1044!\n ...\n ip_tun_parse_opts.part.0.cold+0x10/0x10\n ip_tun_build_state+0x116/0x2a0\n\nOn kernels built with GCC 15+ and `CONFIG_FORTIFY_SOURCE`, the fortified\n`memcpy()` got 0 sized destination with request of 4 bytes length:\n\n static int ip_tun_parse_opts_geneve(...)\n {\n ...\n attr = tb[LWTUNNEL_IP_OPT_GENEVE_DATA];\n data_len = nla_len(attr); /* == 4 */\n\n struct geneve_opt *opt = ip_tunnel_info_opts(info) + opts_len;\n memcpy(opt->opt_data, nla_data(attr), data_len);\n /* ^^^^^^^^^^^^^ 0 since options_len is assigned afterwards */\n\nFixed by initializing the counter before the options are referenced.\nMatching what `tunnel_key_opts_set()` already does."
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/ipv4/ip_tunnel_core.c"
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],
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"versions": [
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{
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"version": "bb5e62f2d547c4de6d1b144cbce2373a76c33f18",
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"lessThan": "9907325257b4b382f26aafd5d9a8d47915907dd5",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "bb5e62f2d547c4de6d1b144cbce2373a76c33f18",
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"lessThan": "0f6a6beb01c068fcd5274eabf22c260039749fea",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "bb5e62f2d547c4de6d1b144cbce2373a76c33f18",
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"lessThan": "455ebeadf714f51e1dbbd6a022c74c9215b1cd76",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/ipv4/ip_tunnel_core.c"
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],
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"versions": [
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{
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"version": "6.15",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.15",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.54",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2.8",
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"lessThanOrEqual": "7.2.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.3",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.15",
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"versionEndExcluding": "6.18.54"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.15",
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"versionEndExcluding": "7.2.8"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.15",
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"versionEndExcluding": "7.3"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/9907325257b4b382f26aafd5d9a8d47915907dd5"
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},
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{
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"url": "https://git.kernel.org/stable/c/0f6a6beb01c068fcd5274eabf22c260039749fea"
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},
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{
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"url": "https://git.kernel.org/stable/c/455ebeadf714f51e1dbbd6a022c74c9215b1cd76"
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}
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],
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"title": "net: ip_tunnel: initialize `options_len` before referencing options",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |