203 lines
9.8 KiB
JSON
203 lines
9.8 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-2026-98101",
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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": "2026-09-25T10:25:14.315Z",
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"datePublished": "2026-09-25T10:35:52.731Z",
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"dateUpdated": "2026-10-19T09:13:53.770Z"
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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": "2026-10-19T09:13:53.770Z"
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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\nipv6: mcast: use copy-on-write RCU updates in ip6_mc_source()\n\npmc->sflist is read locklessly under rcu_read_lock() by\ninet6_mc_check() during packet reception in the UDP and RAW\nmulticast receive paths.\n\nip6_mc_source() mutated psl->sl_addr and psl->sl_count in-place\nwhen adding or removing a source filter. Additionally, when expanding\nthe filter buffer, newpsl was published via rcu_assign_pointer()\nbefore writing the new source into the array.\n\nBecause 16-byte struct in6_addr writes are not atomic and array\nshifting is not synchronized with RCU readers, concurrent readers in\ninet6_mc_check() could read torn IPv6 addresses or observe\nduplicated/missed source entries.\n\nFix this by switching ip6_mc_source() to copy-on-write RCU updates:\nallocate and fully populate newpsl before publishing it via\nrcu_assign_pointer(), and reclaim the old filter via kfree_rcu(),\nmatching ip6_mc_msfilter().\n\nAlso remove the now unused IP6_SFBLOCK macro."
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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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"include/net/if_inet6.h",
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"net/ipv6/mcast.c"
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],
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"versions": [
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{
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"version": "882ba1f73c06831f2a21044ebd8864c485ac04f2",
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"lessThan": "ac51321d3b2391860a935820ebcf4d8b9bb16a8a",
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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": "882ba1f73c06831f2a21044ebd8864c485ac04f2",
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"lessThan": "dba00514bf668c26cb4900e9f0da84bf96bf065a",
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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": "882ba1f73c06831f2a21044ebd8864c485ac04f2",
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"lessThan": "2c2091e2ee93049fc513ad1e6c99d8b6c809f467",
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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": "882ba1f73c06831f2a21044ebd8864c485ac04f2",
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"lessThan": "20db91a052332ef5552bd2f651ffb9db911cf67b",
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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": "882ba1f73c06831f2a21044ebd8864c485ac04f2",
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"lessThan": "c073d1b070f171d206b19c98d71739a97f15b3f1",
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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": "47c75e3923c8d562fea8daf0ccf31546a7bef0ea",
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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": "5.10.261",
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"lessThan": "5.11",
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"status": "affected",
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"versionType": "semver"
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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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"include/net/if_inet6.h",
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"net/ipv6/mcast.c"
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],
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"versions": [
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{
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"version": "5.13",
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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": "5.13",
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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": "6.6.158",
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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": "6.18.53",
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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": "7.2.7",
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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": "5.13",
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"versionEndExcluding": "6.6.158"
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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": "5.13",
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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": "5.13",
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"versionEndExcluding": "6.18.53"
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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": "5.13",
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"versionEndExcluding": "7.2.7"
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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": "5.13",
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"versionEndExcluding": "7.3"
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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": "5.10.261"
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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/ac51321d3b2391860a935820ebcf4d8b9bb16a8a"
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},
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{
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"url": "https://git.kernel.org/stable/c/dba00514bf668c26cb4900e9f0da84bf96bf065a"
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},
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{
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"url": "https://git.kernel.org/stable/c/2c2091e2ee93049fc513ad1e6c99d8b6c809f467"
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},
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{
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"url": "https://git.kernel.org/stable/c/20db91a052332ef5552bd2f651ffb9db911cf67b"
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},
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{
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"url": "https://git.kernel.org/stable/c/c073d1b070f171d206b19c98d71739a97f15b3f1"
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}
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],
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"title": "ipv6: mcast: use copy-on-write RCU updates in ip6_mc_source()",
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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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} |