248 lines
12 KiB
JSON
248 lines
12 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-2026-98493",
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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": "2026-09-25T10:25:14.353Z",
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"datePublished": "2026-10-18T15:16:22.301Z",
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"dateUpdated": "2026-10-30T12:38:18.516Z"
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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": "2026-10-30T12:38:18.516Z"
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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: ipconfig: bound DHCP option construction\n\nic_dhcp_init_options() appends the hostname (option 12), vendor-class\n(option 60) and client-ID (option 61) options into the fixed 312-byte\nbootp_pkt.exten[] buffer. Only the client-ID branch checked the\nremaining space; the hostname and vendor-class writes were unbounded.\n\nA 64-byte hostname together with the maximum 252-byte dhcpclass=\nidentifier needs 18 + (2 + 64) + (2 + 252) = 338 of the 312 available\nbytes even before the terminating END marker, so the vendor-class memcpy\nruns past the end of exten[]. With CONFIG_FORTIFY_SOURCE this is\nreported as a field-spanning write and, when the kernel is booted with\npanic_on_warn=1, aborts boot with a panic.\n\nRoute the optional options through a common helper that makes sure the\noption, its 2-byte header and the END marker all fit and drops an option\nthat would not. Configurations with short options keep sending exactly\nthe same bytes as before."
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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/ipconfig.c"
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],
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"versions": [
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{
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"version": "130c0f47fdf9c533deb1136cad5136f6cb7020f0",
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"lessThan": "e0a221cec0e0ee437680ae0314a4b166509442c5",
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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": "130c0f47fdf9c533deb1136cad5136f6cb7020f0",
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"lessThan": "ca811550b9fa87e02845b4a332d194c2304d933f",
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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": "130c0f47fdf9c533deb1136cad5136f6cb7020f0",
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"lessThan": "d8016c82acdd7eaa462e1f38a962b15d8c6a650b",
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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": "130c0f47fdf9c533deb1136cad5136f6cb7020f0",
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"lessThan": "38a6a118260ebfc82d0c653194d616bdfbd236ac",
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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": "130c0f47fdf9c533deb1136cad5136f6cb7020f0",
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"lessThan": "abcba6f080c63e403037ecdffde43170d242376a",
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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": "130c0f47fdf9c533deb1136cad5136f6cb7020f0",
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"lessThan": "24e79508b237dd2a69bc6fb6ac5cf7f126178307",
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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": "130c0f47fdf9c533deb1136cad5136f6cb7020f0",
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"lessThan": "cbaad2922bd5d4d303055ae9afecc8999e6b40c9",
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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": "130c0f47fdf9c533deb1136cad5136f6cb7020f0",
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"lessThan": "e47a1958e12abc3a17b5231a4f21c8f1bf662e08",
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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/ipconfig.c"
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],
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"versions": [
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{
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"version": "2.6.36",
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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": "2.6.36",
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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": "5.10.273",
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"lessThanOrEqual": "5.10.*",
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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": "5.15.224",
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"lessThanOrEqual": "5.15.*",
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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": "6.1.191",
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"lessThanOrEqual": "6.1.*",
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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": "6.6.160",
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"lessThanOrEqual": "6.6.*",
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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": "6.12.112",
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"lessThanOrEqual": "6.12.*",
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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": "6.18.55",
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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": "7.2.9",
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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": "2.6.36",
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"versionEndExcluding": "5.10.273"
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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": "2.6.36",
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"versionEndExcluding": "5.15.224"
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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": "2.6.36",
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"versionEndExcluding": "6.1.191"
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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": "2.6.36",
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"versionEndExcluding": "6.6.160"
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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": "2.6.36",
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"versionEndExcluding": "6.12.112"
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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": "2.6.36",
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"versionEndExcluding": "6.18.55"
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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": "2.6.36",
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"versionEndExcluding": "7.2.9"
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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": "2.6.36",
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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/e0a221cec0e0ee437680ae0314a4b166509442c5"
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},
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{
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"url": "https://git.kernel.org/stable/c/ca811550b9fa87e02845b4a332d194c2304d933f"
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},
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{
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"url": "https://git.kernel.org/stable/c/d8016c82acdd7eaa462e1f38a962b15d8c6a650b"
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},
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{
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"url": "https://git.kernel.org/stable/c/38a6a118260ebfc82d0c653194d616bdfbd236ac"
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},
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{
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"url": "https://git.kernel.org/stable/c/abcba6f080c63e403037ecdffde43170d242376a"
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},
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{
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"url": "https://git.kernel.org/stable/c/24e79508b237dd2a69bc6fb6ac5cf7f126178307"
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},
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{
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"url": "https://git.kernel.org/stable/c/cbaad2922bd5d4d303055ae9afecc8999e6b40c9"
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},
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{
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"url": "https://git.kernel.org/stable/c/e47a1958e12abc3a17b5231a4f21c8f1bf662e08"
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}
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],
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"title": "net: ipconfig: bound DHCP option construction",
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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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} |