214 lines
11 KiB
JSON
214 lines
11 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-2024-42112",
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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": "2024-07-29T15:50:41.176Z",
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"datePublished": "2024-07-30T07:46:06.237Z",
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"dateUpdated": "2026-08-05T11:35:44.345Z"
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},
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"cna": {
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T11:35:44.345Z"
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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\nnet: txgbe: free isb resources at the right time\n\nWhen using MSI/INTx interrupt, the shared interrupts are still being\nhandled in the device remove routine, before free IRQs. So isb memory\nis still read after it is freed. Thus move wx_free_isb_resources()\nfrom txgbe_close() to txgbe_remove(). And fix the improper isb free\naction in txgbe_open() error handling path."
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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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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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:L - The vulnerable window is opened by a local device-management action — `ip link set dev X down` (`txgbe_close()`/`ngbe_close()`), an ethtool reconfigure that cycles the interface, or driver unbind/`rmmod` (`txgbe_remove()`) — none of which a remote peer can request. Received network frames cannot reach the code, since Rx and bus mastering are already disabled when the interface goes down.\nAC:L - Once the driver is in MSI/INTx mode (VMs, `pci=nomsi`, MSI-X vector exhaustion, and the ngbe 1G parts), the stale handler dereference is deterministic: after `ifdown` or during the multi-millisecond `txgbe_remove_phy()` window, the very next interrupt on the shared line hits the freed/NULL `isb_mem`, and the attacker can both generate that interrupt activity and repeat ifdown/ifup cycles to hit the narrow free-to-NULL window.\nPR:L - The trigger needs `CAP_NET_ADMIN` over the netdev's namespace, which is held by container/appliance \"root\" whenever a physical Wangxun port is delegated into a network namespace owned by a user namespace, so it is not a real-root-only operation. Any semi-privileged network-management context (NetworkManager helpers, orchestration agents, netns-delegated containers) can drive the close/unbind path.\nUI:N - The attacker performs the interface-down or unbind step themselves and the interrupt that faults arrives from ordinary ambient device activity; no action by another user or administrator is required.\nS:U - The freed DMA buffer, the faulting interrupt handler, and the resulting corruption/panic all live in the kernel's own security authority, with no crossing of a hypervisor, IOMMU, or sandbox boundary.\nC:H - Upstream describes the defect as isb memory \"still read after it is freed\" — `wx_misc_isb()` reads a page already returned to the page allocator and therefore potentially re-populated with arbitrary kernel data, and a use-after-free on attacker-groomable memory is treatable as an arbitrary-read primitive.\nI:H - Beyond the read, `txgbe_misc_irq_handle()` executes `wx->isb_mem[WX_ISB_VEC0] = 0`, a write into the freed page; with ifdown/ifup cycling plus heap spraying the attacker can control what occupies that page, turning a fixed-offset zeroing write into kernel memory corruption usable against refcounts, flags, or pointers.\nA:H - In the far larger post-`NULL`-store window the handler dereferences a NULL `isb_mem` from hard-IRQ context, producing an oops in interrupt context (\"Fatal exception in interrupt\") that panics the machine, and this is reproducible on every ifdown or module removal on an INTx-shared system."
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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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"drivers/net/ethernet/wangxun/libwx/wx_lib.c",
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"drivers/net/ethernet/wangxun/ngbe/ngbe_main.c",
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"drivers/net/ethernet/wangxun/txgbe/txgbe_main.c"
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],
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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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"drivers/net/ethernet/wangxun/libwx/wx_lib.c",
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"drivers/net/ethernet/wangxun/ngbe/ngbe_main.c",
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"drivers/net/ethernet/wangxun/txgbe/txgbe_main.c"
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],
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},
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{
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"version": "6.9.9",
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"lessThanOrEqual": "6.9.*",
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"status": "unaffected",
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},
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{
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"version": "6.10",
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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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"title": "net: txgbe: free isb resources at the right time",
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"role": "CISA Coordinator",
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"options": [
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