GHSA-9P8F-QH7P-793J
Vulnerability from github – Published: 2024-09-04 21:30 – Updated: 2025-11-03 21:31In the Linux kernel, the following vulnerability has been resolved:
net: mana: Fix RX buf alloc_size alignment and atomic op panic
The MANA driver's RX buffer alloc_size is passed into napi_build_skb() to create SKB. skb_shinfo(skb) is located at the end of skb, and its alignment is affected by the alloc_size passed into napi_build_skb(). The size needs to be aligned properly for better performance and atomic operations. Otherwise, on ARM64 CPU, for certain MTU settings like 4000, atomic operations may panic on the skb_shinfo(skb)->dataref due to alignment fault.
To fix this bug, add proper alignment to the alloc_size calculation.
Sample panic info: [ 253.298819] Unable to handle kernel paging request at virtual address ffff000129ba5cce [ 253.300900] Mem abort info: [ 253.301760] ESR = 0x0000000096000021 [ 253.302825] EC = 0x25: DABT (current EL), IL = 32 bits [ 253.304268] SET = 0, FnV = 0 [ 253.305172] EA = 0, S1PTW = 0 [ 253.306103] FSC = 0x21: alignment fault Call trace: __skb_clone+0xfc/0x198 skb_clone+0x78/0xe0 raw6_local_deliver+0xfc/0x228 ip6_protocol_deliver_rcu+0x80/0x500 ip6_input_finish+0x48/0x80 ip6_input+0x48/0xc0 ip6_sublist_rcv_finish+0x50/0x78 ip6_sublist_rcv+0x1cc/0x2b8 ipv6_list_rcv+0x100/0x150 __netif_receive_skb_list_core+0x180/0x220 netif_receive_skb_list_internal+0x198/0x2a8 __napi_poll+0x138/0x250 net_rx_action+0x148/0x330 handle_softirqs+0x12c/0x3a0
{
"affected": [],
"aliases": [
"CVE-2024-45001"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-09-04T20:15:08Z",
"severity": "MODERATE"
},
"details": "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\u0027s 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)-\u003edataref 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",
"id": "GHSA-9p8f-qh7p-793j",
"modified": "2025-11-03T21:31:12Z",
"published": "2024-09-04T21:30:32Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-45001"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/32316f676b4ee87c0404d333d248ccf777f739bc"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/65f20b174ec0172f2d6bcfd8533ab9c9e7e347fa"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e6bea6a45f8a401f3d5a430bc81814f0cc8848cf"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
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