{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-42112", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-07-29T15:50:41.176Z", "datePublished": "2024-07-30T07:46:06.237Z", "dateUpdated": "2026-08-05T11:35:44.345Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:35:44.345Z" }, "descriptions": [ { "lang": "en", "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." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "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." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ethernet/wangxun/libwx/wx_lib.c", "drivers/net/ethernet/wangxun/ngbe/ngbe_main.c", "drivers/net/ethernet/wangxun/txgbe/txgbe_main.c" ], "versions": [ { "version": "aefd013624a10f39b0bfaee8432a235128705380", "lessThan": "efdc3f54299835ddef23bea651c753c4d467010b", "status": "affected", "versionType": "git" }, { "version": "aefd013624a10f39b0bfaee8432a235128705380", "lessThan": "935124dd5883b5de68dc5a94f582480a10643dc9", "status": "affected", "versionType": "git" }, { "version": "ffe8a87463c8bb885c42ed54540d06ed041e76dc", "status": "affected", "versionType": "git" }, { "version": "6.8.12", "lessThan": "6.9", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ethernet/wangxun/libwx/wx_lib.c", "drivers/net/ethernet/wangxun/ngbe/ngbe_main.c", "drivers/net/ethernet/wangxun/txgbe/txgbe_main.c" ], "versions": [ { "version": "6.9", "status": "affected" }, { "version": "0", "lessThan": "6.9", "status": "unaffected", "versionType": "semver" }, { "version": "6.9.9", "lessThanOrEqual": "6.9.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.10", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "6.9.9" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "6.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8.12" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/efdc3f54299835ddef23bea651c753c4d467010b" }, { "url": "https://git.kernel.org/stable/c/935124dd5883b5de68dc5a94f582480a10643dc9" } ], "title": "net: txgbe: free isb resources at the right time", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T04:54:32.263Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/efdc3f54299835ddef23bea651c753c4d467010b", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/935124dd5883b5de68dc5a94f582480a10643dc9", "tags": [ "x_transferred" ] } ] }, { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2024-42112", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-09-10T16:17:26.486889Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:33:06.438Z" } } ] } }