315 lines
16 KiB
JSON
315 lines
16 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-2026-98103",
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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": "2026-09-25T10:35:53.942Z",
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"dateUpdated": "2026-10-21T12:54:31.184Z"
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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": "2026-10-21T12:54:31.184Z"
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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\nigmp: convert struct ip_sf_list to RCU\n\nCommit 23d2b94043ca (\"igmp: Add ip_mc_list lock in ip_check_mc_rcu\")\nadded spin_lock_bh(&im->lock) to ip_check_mc_rcu() to prevent a\nuse-after-free while iterating im->sources during concurrent deletions.\n\nHowever, ip_check_mc_rcu() is called from RCU read-side critical\nsections in packet receive and route lookup fast paths (e.g.\n__mkroute_output(), ip_route_input_rcu(), and __udp4_lib_rcv()).\n\nWhen igmpv3_send_cr() or igmpv3_send_report() holds &pmc->lock and\ncalls add_grec() -> igmpv3_newpack() -> ip_route_output_ports(),\nan XFRM policy matching a multicast destination triggers\nxfrm_tmpl_resolve_one() -> xfrm4_get_saddr() -> __mkroute_output() ->\nip_check_mc_rcu(). This attempts to acquire &im->lock while &pmc->lock\nis already held on the same CPU, triggering a lockdep recursive locking\nwarning / deadlock.\n\nFix this by converting IPv4 struct ip_sf_list to RCU, mirroring the\nIPv6 implementation in net/ipv6/mcast.c:\n\n1. Add struct rcu_head to struct ip_sf_list and annotate sf_next,\n sources, and tomb as __rcu pointers.\n2. Use rcu_assign_pointer() and kfree_rcu() for list updates and\n deletions.\n3. Remove spin_lock_bh(&im->lock) from ip_check_mc_rcu() and traverse\n im->sources locklessly with for_each_psf_rcu(), reading and writing\n counter fields with READ_ONCE() and WRITE_ONCE().\n\nNote: RCU conversion of /proc/net/mcfilter will be done in a\nseparate patch."
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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/linux/igmp.h",
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"net/ipv4/igmp.c"
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],
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"versions": [
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{
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"version": "23d2b94043ca8835bd1e67749020e839f396a1c2",
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"lessThan": "01131daffc4b64f1652e23dc3e6e2f601eda781d",
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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": "23d2b94043ca8835bd1e67749020e839f396a1c2",
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"lessThan": "f5182dfad54277267a8cb0c004a9cd4cf35aeebb",
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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": "23d2b94043ca8835bd1e67749020e839f396a1c2",
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"lessThan": "d3011d1f293478c730aa0870490afa145c37600e",
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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": "23d2b94043ca8835bd1e67749020e839f396a1c2",
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"lessThan": "e3206419bdb04e2087d8cc6be324df8639b3fac5",
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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": "23d2b94043ca8835bd1e67749020e839f396a1c2",
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"lessThan": "2987ee196c88dbde0463dc87d5fb209c684e34a2",
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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": "b24065948ae6c48c9e20891f8cfe9850f1d748be",
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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": "e9924c4204ede999b0515fd31a370a1e27f676bc",
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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": "78967749984cf3614de346c90f3e259ff8272735",
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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": "4768973dffed4d0126854514335ed4fe87bec1ab",
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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": "d84708451d9041dff8a81e3718f821f12d2eb6c5",
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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": "ddd7e8b7b84836c584a284b98ca9bd7a348a0558",
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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": "961447ff60291b91e27d5c32fa549c1411ad3b70",
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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": "d1a3c6d5925a8d00a32c5ef2d674dd9c0ce89c95",
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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": "4.4.284",
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"lessThan": "4.5",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "4.9.283",
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"lessThan": "4.10",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "4.14.247",
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"lessThan": "4.15",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "4.19.207",
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"lessThan": "4.20",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "5.4.145",
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"lessThan": "5.5",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "5.10.64",
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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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"version": "5.13.16",
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"lessThan": "5.14",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "5.14.3",
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"lessThan": "5.15",
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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/linux/igmp.h",
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"net/ipv4/igmp.c"
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],
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"versions": [
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{
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"version": "5.15",
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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": "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": "6.6.160",
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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": "6.12.111",
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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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"nodes": [
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.15",
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"versionEndExcluding": "6.6.160"
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},
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{
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{
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},
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},
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"versionStartIncluding": "5.14.3"
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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/01131daffc4b64f1652e23dc3e6e2f601eda781d"
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},
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{
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"url": "https://git.kernel.org/stable/c/f5182dfad54277267a8cb0c004a9cd4cf35aeebb"
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},
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{
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"url": "https://git.kernel.org/stable/c/d3011d1f293478c730aa0870490afa145c37600e"
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},
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{
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"url": "https://git.kernel.org/stable/c/e3206419bdb04e2087d8cc6be324df8639b3fac5"
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},
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{
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"url": "https://git.kernel.org/stable/c/2987ee196c88dbde0463dc87d5fb209c684e34a2"
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}
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],
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"title": "igmp: convert struct ip_sf_list to RCU",
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} |