248 lines
13 KiB
JSON
248 lines
13 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-2026-99201",
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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": "2026-09-25T10:25:14.400Z",
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"datePublished": "2026-10-28T10:35:56.069Z",
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"dateUpdated": "2026-10-30T12:42:51.128Z"
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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": "2026-10-30T12:42:51.128Z"
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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\nnetlink: avoid hashing the network namespace pointer\n\nThe netlink rhashtable key includes a raw struct net pointer and a\nuser-controlled port ID. Both /proc/net/netlink and socket diagnostics\nexpose the table's bucket order. By binding and rebinding chosen\nNETLINK_USERSOCK port IDs, an unprivileged reader can distinguish equal\nbuckets and recover the low bits of the Jenkins hash. Its 32-bit seed\nand the limited set of kernel-image slides can then be searched offline\nto recover the address of init_net.\n\nUse the namespace's unique, non-address net_cookie in the comparison\nkey instead. It is assigned before the per-net initializers run and\nremains unchanged for the namespace's lifetime. The lookup key and\nobject hash are still built by netlink_compare_arg_init(), keeping\nlookup, insertion, removal and rehashing consistent while preserving\nnamespace separation. Neither public table walker needs to change.\n\nReading the socket's namespace cookie in netlink_compare() is safe\nunder RCU, including during namespace teardown. netlink_release()\nremoves the socket from the hash table and defers its final put with\ncall_rcu(). cleanup_net() runs the per-net exit methods and waits for\noutstanding RCU callbacks with rcu_barrier() before freeing namespace\nstorage.\n\nUnlike ns.ns_id, net_cookie is also available and initialized during\nsetup_net() in older stable kernels, making the change straightforward\nto backport to v5.15 and later."
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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/netlink/af_netlink.c"
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],
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"versions": [
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{
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"version": "c428ecd1a21f1457ca3beb4df71b8a079c410e41",
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"lessThan": "c61431f3b8c9824e9848a0308054f92b27fa7794",
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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": "c428ecd1a21f1457ca3beb4df71b8a079c410e41",
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"lessThan": "f8d2690f3c5dfad1fc306f6d5d84a1d3176c3af9",
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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": "c428ecd1a21f1457ca3beb4df71b8a079c410e41",
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"lessThan": "c03fb9c4be3b2dd0996d91e54f65407f7f475238",
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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": "c428ecd1a21f1457ca3beb4df71b8a079c410e41",
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"lessThan": "41a2f69f091b0765f17890d8ac04852c12f25cf6",
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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": "c428ecd1a21f1457ca3beb4df71b8a079c410e41",
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"lessThan": "18edcb9945118beb7a1b64a31a7370ecab485a79",
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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": "c428ecd1a21f1457ca3beb4df71b8a079c410e41",
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"lessThan": "bdd55b8a8acbf6b4840ab420eb6a63774bf4593b",
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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": "c428ecd1a21f1457ca3beb4df71b8a079c410e41",
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"lessThan": "078deff25f8a849ecd1c3fe17b1e473b1cf44f28",
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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": "c428ecd1a21f1457ca3beb4df71b8a079c410e41",
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"lessThan": "f88bb3606e4bd11ee035b682cddc2999e604609a",
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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/netlink/af_netlink.c"
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],
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"versions": [
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{
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"version": "4.1",
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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": "4.1",
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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": "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": "4.1",
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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": "4.1",
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"versionEndExcluding": "5.15.224"
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},
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.1",
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"versionEndExcluding": "6.1.191"
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.1",
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"versionEndExcluding": "6.6.161"
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},
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.1",
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"versionEndExcluding": "6.12.115"
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.1",
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"versionEndExcluding": "7.2.13"
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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/c61431f3b8c9824e9848a0308054f92b27fa7794"
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},
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{
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"url": "https://git.kernel.org/stable/c/f8d2690f3c5dfad1fc306f6d5d84a1d3176c3af9"
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},
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{
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"url": "https://git.kernel.org/stable/c/c03fb9c4be3b2dd0996d91e54f65407f7f475238"
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},
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{
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"url": "https://git.kernel.org/stable/c/41a2f69f091b0765f17890d8ac04852c12f25cf6"
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},
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{
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"url": "https://git.kernel.org/stable/c/18edcb9945118beb7a1b64a31a7370ecab485a79"
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},
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{
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"url": "https://git.kernel.org/stable/c/bdd55b8a8acbf6b4840ab420eb6a63774bf4593b"
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},
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{
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"url": "https://git.kernel.org/stable/c/078deff25f8a849ecd1c3fe17b1e473b1cf44f28"
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},
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{
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"url": "https://git.kernel.org/stable/c/f88bb3606e4bd11ee035b682cddc2999e604609a"
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}
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],
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"title": "netlink: avoid hashing the network namespace pointer",
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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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} |