{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-45001", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-08-21T05:34:56.678Z", "datePublished": "2024-09-04T19:54:44.961Z", "dateUpdated": "2026-08-05T11:37:38.436Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:37:38.436Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mana: Fix RX buf alloc_size alignment and atomic op panic\n\nThe MANA driver's RX buffer alloc_size is passed into napi_build_skb() to\ncreate SKB. skb_shinfo(skb) is located at the end of skb, and its alignment\nis affected by the alloc_size passed into napi_build_skb(). The size needs\nto be aligned properly for better performance and atomic operations.\nOtherwise, on ARM64 CPU, for certain MTU settings like 4000, atomic\noperations may panic on the skb_shinfo(skb)->dataref due to alignment fault.\n\nTo fix this bug, add proper alignment to the alloc_size calculation.\n\nSample panic info:\n[ 253.298819] Unable to handle kernel paging request at virtual address ffff000129ba5cce\n[ 253.300900] Mem abort info:\n[ 253.301760] ESR = 0x0000000096000021\n[ 253.302825] EC = 0x25: DABT (current EL), IL = 32 bits\n[ 253.304268] SET = 0, FnV = 0\n[ 253.305172] EA = 0, S1PTW = 0\n[ 253.306103] FSC = 0x21: alignment fault\nCall trace:\n __skb_clone+0xfc/0x198\n skb_clone+0x78/0xe0\n raw6_local_deliver+0xfc/0x228\n ip6_protocol_deliver_rcu+0x80/0x500\n ip6_input_finish+0x48/0x80\n ip6_input+0x48/0xc0\n ip6_sublist_rcv_finish+0x50/0x78\n ip6_sublist_rcv+0x1cc/0x2b8\n ipv6_list_rcv+0x100/0x150\n __netif_receive_skb_list_core+0x180/0x220\n netif_receive_skb_list_internal+0x198/0x2a8\n __napi_poll+0x138/0x250\n net_rx_action+0x148/0x330\n handle_softirqs+0x12c/0x3a0" } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:N - The fault is triggered entirely by receiving a packet on the MANA NIC's RX path, which is the internet/VNet-facing interface of an Azure VM; a remote attacker's packet reaching any of the ubiquitous `skb_clone()` consumers (AF_PACKET tap, bridge flooding, multicast/raw socket delivery) panics the machine.\nAC:L - The misalignment is present with the default MTU of 1500 as well as jumbo settings (shinfo offset ≡ mtu+2 mod 4 for all standard MTUs), requires no special configuration, and the attacker simply sends ordinary traffic — no race, no memory-layout grooming, and the crash is deterministic on the first cloned skb.\nPR:N - No authentication or credentials of any kind are needed; the panic occurs in the NAPI/softirq receive path before any socket-level authorization, so any unauthenticated host that can send packets to the VM can trigger it.\nUI:N - No victim action is required; the packet is processed automatically by the driver's NAPI poll and the network stack's clone paths.\nS:U - The alignment fault crashes the kernel that owns the vulnerable driver, with no crossing of a security authority boundary such as a VM or IOMMU escape.\nC:N - The misaligned `skb_shinfo`/`dataref` is entirely inside the allocated RX buffer, so nothing out of bounds is read and no kernel data is disclosed — the CPU faults before any access completes.\nI:N - There is no out-of-bounds or use-after-free write; the defect only mislocates an in-bounds structure whose atomic access aborts, so no kernel memory is modified and no control-flow primitive is obtained.\nA:H - The unaligned atomic on `skb_shinfo(skb)->dataref` raises an unhandled ARM64 alignment fault in softirq context, producing a fatal exception in interrupt and a full kernel panic that can be re-triggered by any subsequent received packet." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ethernet/microsoft/mana/mana_en.c" ], "versions": [ { "version": "80f6215b450eb8e92d8b1f117abf5ecf867f963e", "lessThan": "65f20b174ec0172f2d6bcfd8533ab9c9e7e347fa", "status": "affected", "versionType": "git" }, { "version": "80f6215b450eb8e92d8b1f117abf5ecf867f963e", "lessThan": "e6bea6a45f8a401f3d5a430bc81814f0cc8848cf", "status": "affected", "versionType": "git" }, { "version": "80f6215b450eb8e92d8b1f117abf5ecf867f963e", "lessThan": "32316f676b4ee87c0404d333d248ccf777f739bc", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ethernet/microsoft/mana/mana_en.c" ], "versions": [ { "version": "6.4", "status": "affected" }, { "version": "0", "lessThan": "6.4", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.48", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.10.7", "lessThanOrEqual": "6.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.11", "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": "6.4", "versionEndExcluding": "6.6.48" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.10.7" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.11" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/65f20b174ec0172f2d6bcfd8533ab9c9e7e347fa" }, { "url": "https://git.kernel.org/stable/c/e6bea6a45f8a401f3d5a430bc81814f0cc8848cf" }, { "url": "https://git.kernel.org/stable/c/32316f676b4ee87c0404d333d248ccf777f739bc" } ], "title": "net: mana: Fix RX buf alloc_size alignment and atomic op panic", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2024-09-04T20:18:42.711602Z", "id": "CVE-2024-45001", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-04T20:19:02.550Z" } }, { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T19:30:48.703Z" } } ] } }