159 lines
8.6 KiB
JSON
159 lines
8.6 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-2026-64150",
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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": "2026-07-19T07:54:57.037Z",
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"datePublished": "2026-07-19T15:40:40.027Z",
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"dateUpdated": "2026-08-05T12:39:44.813Z"
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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": "2026-08-05T12:39:44.813Z"
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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\nnetfilter: nft_inner: release local_lock before re-enabling softirqs\n\nQuoting sashiko:\n In the error path, local_bh_enable() is called before\n local_unlock_nested_bh()."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 9.8,
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"baseSeverity": "CRITICAL"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:N - The bug is hit during packet evaluation in netfilter hooks (prerouting/forward/input) when tunneled traffic (GRE/UDP/Geneve) matching admin-deployed `inner` rules is processed; remote packets reach `nft_inner_restore_tun_ctx()` without any local syscall.\nAC:L - An attacker can reliably provoke the cookie-mismatch error path by sending concurrent tunneled packets through an `inner`-enabled chain, controlling both sides of the per-CPU context race; no attacker-uncontrollable memory layout or rare timing is required.\nPR:N - Exploitation requires only the ability to send network packets to a host whose nftables rules already include `inner` expressions (typical on cloud NFV/firewall gateways); no local account, capability, or user-namespace `CAP_NET_ADMIN` is needed by the remote attacker.\nUI:N - No victim interaction beyond normal network traffic delivery to a host running nftables tunnel-inspection rules; the attacker does not need the victim to open files, mount filesystems, or take any deliberate action.\nS:U - Impact is confined to kernel netfilter/nftables processing on the target host; it does not cross VM, container, or IOMMU security boundaries to affect separate security authorities.\nC:H - Re-enabling softirqs before releasing the nested-BH lock breaks serialization of the per-CPU `nft_pcpu_tun_ctx`, allowing concurrent corruption of inner header offsets that `nft_payload_inner_eval()` uses in `skb_copy_bits()`, yielding out-of-bounds kernel memory reads.\nI:H - The same unsynchronized per-CPU state corruption can desynchronize inner parsing metadata and, on PREEMPT_RT, leave a per-CPU spinlock held across softirq re-entry causing deadlock; memory corruption of parsing state is exploitable for further control of packet-processing behavior.\nA:H - On PREEMPT_RT kernels the inverted unlock/BH ordering leaves the per-CPU spinlock held while softirqs run, causing softirq handlers to block on the same lock and producing CPU deadlock or soft lockup; non-RT paths can also crash or hang from the resulting race."
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}
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]
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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/netfilter/nft_inner.c"
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],
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"versions": [
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{
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"version": "ba36fada9ab487634f61f92769c95bc148aa8f49",
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"lessThan": "df19b6af171695a1352314597c9a4311d48d5171",
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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": "ba36fada9ab487634f61f92769c95bc148aa8f49",
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"lessThan": "6fecd39c6401134b58505bc4eb1adc8a0e2fe992",
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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": "ba36fada9ab487634f61f92769c95bc148aa8f49",
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"lessThan": "a6cb3ff979855f7f0ee9450a947fe8f96c2ba37a",
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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/netfilter/nft_inner.c"
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],
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"versions": [
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{
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"version": "6.16",
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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": "6.16",
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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": "6.18.34",
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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": "7.0.11",
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"lessThanOrEqual": "7.0.*",
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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": "7.1",
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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": "6.16",
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"versionEndExcluding": "6.18.34"
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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": "6.16",
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"versionEndExcluding": "7.0.11"
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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": "6.16",
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"versionEndExcluding": "7.1"
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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/df19b6af171695a1352314597c9a4311d48d5171"
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},
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{
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"url": "https://git.kernel.org/stable/c/6fecd39c6401134b58505bc4eb1adc8a0e2fe992"
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},
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{
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"url": "https://git.kernel.org/stable/c/a6cb3ff979855f7f0ee9450a947fe8f96c2ba37a"
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}
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],
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"title": "netfilter: nft_inner: release local_lock before re-enabling softirqs",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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} |