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CVE-2024-57843— virtio-net: fix overflow inside virtnet_rq_alloc

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于virtio-net模块在virtnet_rq_alloc中可能导致溢出，影响虚拟机性能。

CVSS 9.8 · Critical EPSS 0.41% · P34

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux 295525e29a5b5694a6e96864f0c1365f79639863< a8f7d6963768b114ec9644ff0148dde4c104e84b affected
295525e29a5b5694a6e96864f0c1365f79639863< 67a11de8965c2ab19e215fb6651d44847e068614 affected
295525e29a5b5694a6e96864f0c1365f79639863< 6aacd1484468361d1d04badfe75f264fa5314864 affected
6.6 affected
< 6.6 unaffected
6.6.66≤ 6.6.* unaffected
6.12.5≤ 6.12.* unaffected
6.13≤ * unaffected
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I. Basic Information for CVE-2024-57843

Vulnerability Information
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Vulnerability Title
virtio-net: fix overflow inside virtnet_rq_alloc
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: virtio-net: fix overflow inside virtnet_rq_alloc When the frag just got a page, then may lead to regression on VM. Specially if the sysctl net.core.high_order_alloc_disable value is 1, then the frag always get a page when do refill. Which could see reliable crashes or scp failure (scp a file 100M in size to VM). The issue is that the virtnet_rq_dma takes up 16 bytes at the beginning of a new frag. When the frag size is larger than PAGE_SIZE, everything is fine. However, if the frag is only one page and the total size of the buffer and virtnet_rq_dma is larger than one page, an overflow may occur. The commit f9dac92ba908 ("virtio_ring: enable premapped mode whatever use_dma_api") introduced this problem. And we reverted some commits to fix this in last linux version. Now we try to enable it and fix this bug directly. Here, when the frag size is not enough, we reduce the buffer len to fix this problem.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于virtio-net模块在virtnet_rq_alloc中可能导致溢出，影响虚拟机性能。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 295525e29a5b5694a6e96864f0c1365f79639863 ~ a8f7d6963768b114ec9644ff0148dde4c104e84b -
Linux Linux 6.6 -

II. Public POCs for CVE-2024-57843

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III. Intelligence Information for CVE-2024-57843

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Patches & Fixes for CVE-2024-57843 (3)

Same Patch Batch · Linux · 2025-01-11 · 67 CVEs total

CVE-2024-47408 9.8 CRITICAL net/smc: check smcd_v2_ext_offset when receiving proposal msg
CVE-2024-49568 9.8 CRITICAL net/smc: check v2_ext_offset/eid_cnt/ism_gid_cnt when receiving proposal msg
CVE-2024-57793 9.3 CRITICAL virt: tdx-guest: Just leak decrypted memory on unrecoverable errors
CVE-2024-49571 9.1 CRITICAL net/smc: check iparea_offset and ipv6_prefixes_cnt when receiving proposal msg
CVE-2024-55639 8.4 HIGH net: renesas: rswitch: avoid use-after-put for a device tree node
CVE-2024-41149 7.8 HIGH block: avoid to reuse `hctx` not removed from cpuhp callback list
CVE-2024-47794 7.8 HIGH bpf: Prevent tailcall infinite loop caused by freplace
CVE-2024-57875 7.8 HIGH block: RCU protect disk->conv_zones_bitmap
CVE-2024-57850 7.8 HIGH jffs2: Prevent rtime decompress memory corruption
CVE-2024-52319 7.8 HIGH mm: use aligned address in clear_gigantic_page()
CVE-2024-57849 7.8 HIGH s390/cpum_sf: Handle CPU hotplug remove during sampling
CVE-2024-51729 7.8 HIGH mm: use aligned address in copy_user_gigantic_page()
CVE-2024-49569 7.5 HIGH nvme-rdma: unquiesce admin_q before destroy it
CVE-2024-57791 7.5 HIGH net/smc: check return value of sock_recvmsg when draining clc data
CVE-2024-56788 7.5 HIGH net: ethernet: oa_tc6: fix tx skb race condition between reference pointers
CVE-2024-57792 7.3 HIGH power: supply: gpio-charger: Fix set charge current limits
CVE-2024-57804 7.3 HIGH scsi: mpi3mr: Fix corrupt config pages PHY state is switched in sysfs
CVE-2024-56368 7.1 HIGH ring-buffer: Fix overflow in __rb_map_vma
CVE-2024-49573 7.0 HIGH sched/fair: Fix NEXT_BUDDY
CVE-2024-57805 ASoC: SOF: Intel: hda-dai: Do not release the link DMA on STOP

Showing top 20 of 67 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-57843

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