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-2026-99121",
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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": "2026-09-25T10:25:14.393Z",
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"datePublished": "2026-10-28T10:34:37.082Z",
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"dateUpdated": "2026-10-30T12:41:56.754Z"
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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": "2026-10-30T12:41:56.754Z"
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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\nipv4: avoid divide by zero in fib_rebalance\n\nfib_rebalance() computes the total eligible nexthop weight in one pass\nand programs upper bounds in a second pass. A concurrent change to\nignore_routes_with_linkdown can make the first pass return zero while\nthe second pass sees an eligible nexthop, resulting in division by zero.\n\nIf the first pass reports a zero total, set each nexthop upper bound to\n-1 and skip the division. This matches the IPv6 fix in commit\nd2c26c2911dd (\"ipv6: avoid divide by zero in rt6_multipath_rebalance\")\nand preserves the lock-free rebalance path."
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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/fib_semantics.c"
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],
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"versions": [
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{
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"version": "0e884c78ee19e902f300ed147083c28a0c6302f0",
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"lessThan": "baf3a767b2845eb8e68f056ee4aa5b41b151e990",
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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": "0e884c78ee19e902f300ed147083c28a0c6302f0",
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"lessThan": "f655a26490e705ec76a79db7f412847fda342b39",
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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": "0e884c78ee19e902f300ed147083c28a0c6302f0",
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"lessThan": "7c68f4de5090b17b63b9a0a3b01b3807e01a296a",
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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": "0e884c78ee19e902f300ed147083c28a0c6302f0",
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"lessThan": "226a974054acbd892560bfa67f0ae8ffe271a736",
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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": "0e884c78ee19e902f300ed147083c28a0c6302f0",
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"lessThan": "0800c92ca5d1983df6843a5435299978901d1d02",
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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": "0e884c78ee19e902f300ed147083c28a0c6302f0",
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"lessThan": "5dac5c7ba8f5f3fb4bf29f2a2c3cb552f5b83c8f",
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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": "0e884c78ee19e902f300ed147083c28a0c6302f0",
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"lessThan": "d5520e815c4b1427104ce1428ee23821f2aa824d",
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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": "0e884c78ee19e902f300ed147083c28a0c6302f0",
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"lessThan": "5046d2880fec7d49ebed2fd2866747ee1d06ad71",
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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/fib_semantics.c"
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],
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"versions": [
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{
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"version": "4.4",
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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": "4.4",
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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": "6.6.161",
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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": "6.12.115",
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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": "6.18.59",
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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": "7.2.13",
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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": "4.4",
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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": "4.4",
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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": "4.4",
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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": "4.4",
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"versionEndExcluding": "6.6.161"
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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": "4.4",
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"versionEndExcluding": "6.12.115"
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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": "4.4",
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"versionEndExcluding": "6.18.59"
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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": "4.4",
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"versionEndExcluding": "7.2.13"
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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": "4.4",
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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/baf3a767b2845eb8e68f056ee4aa5b41b151e990"
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},
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{
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"url": "https://git.kernel.org/stable/c/f655a26490e705ec76a79db7f412847fda342b39"
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},
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{
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"url": "https://git.kernel.org/stable/c/7c68f4de5090b17b63b9a0a3b01b3807e01a296a"
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},
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{
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"url": "https://git.kernel.org/stable/c/226a974054acbd892560bfa67f0ae8ffe271a736"
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},
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{
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"url": "https://git.kernel.org/stable/c/0800c92ca5d1983df6843a5435299978901d1d02"
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},
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{
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"url": "https://git.kernel.org/stable/c/5dac5c7ba8f5f3fb4bf29f2a2c3cb552f5b83c8f"
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},
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{
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"url": "https://git.kernel.org/stable/c/d5520e815c4b1427104ce1428ee23821f2aa824d"
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},
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{
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"url": "https://git.kernel.org/stable/c/5046d2880fec7d49ebed2fd2866747ee1d06ad71"
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}
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],
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"title": "ipv4: avoid divide by zero in fib_rebalance",
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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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} |