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CVE-2024-50094— sfc: Don't invoke xdp_do_flush() from netpoll.

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sfc模块中，在netpoll情况下无条件调用xdp_do_flush，可能导致崩溃，因为bpf_net_context未被分配。

CVSS 7.5 · High EPSS 0.46% · P39

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 6

VendorProduct Version RangeStatus
Linux Linux 401cb7dae8130fd34eb84648e02ab4c506df7d5e< 65d4fc76d75c136744e67754d20feda609e7b793 affected
401cb7dae8130fd34eb84648e02ab4c506df7d5e< 55e802468e1d38dec8e25a2fdb6078d45b647e8c affected
6.11 affected
< 6.11 unaffected
6.11.4≤ 6.11.* unaffected
6.12≤ * unaffected
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I. Basic Information for CVE-2024-50094

Vulnerability Information
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Vulnerability Title
sfc: Don't invoke xdp_do_flush() from netpoll.
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: sfc: Don't invoke xdp_do_flush() from netpoll. Yury reported a crash in the sfc driver originated from netpoll_send_udp(). The netconsole sends a message and then netpoll invokes the driver's NAPI function with a budget of zero. It is dedicated to allow driver to free TX resources, that it may have used while sending the packet. In the netpoll case the driver invokes xdp_do_flush() unconditionally, leading to crash because bpf_net_context was never assigned. Invoke xdp_do_flush() only if budget is not zero.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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sfc模块中，在netpoll情况下无条件调用xdp_do_flush，可能导致崩溃，因为bpf_net_context未被分配。
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 401cb7dae8130fd34eb84648e02ab4c506df7d5e ~ 65d4fc76d75c136744e67754d20feda609e7b793 -
Linux Linux 6.11 -

II. Public POCs for CVE-2024-50094

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III. Intelligence Information for CVE-2024-50094

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Patches & Fixes for CVE-2024-50094 (1)

Same Patch Batch · Linux · 2024-11-05 · 50 CVEs total

CVE-2024-50106 9.8 CRITICAL nfsd: fix race between laundromat and free_stateid
CVE-2024-50113 8.8 HIGH firewire: core: fix invalid port index for parent device
CVE-2024-50115 8.4 HIGH KVM: nSVM: Ignore nCR3[4:0] when loading PDPTEs from memory
CVE-2024-50125 8.0 HIGH Bluetooth: SCO: Fix UAF on sco_sock_timeout
CVE-2024-50124 8.0 HIGH Bluetooth: ISO: Fix UAF on iso_sock_timeout
CVE-2024-50132 7.8 HIGH tracing/probes: Fix MAX_TRACE_ARGS limit handling
CVE-2024-50101 7.8 HIGH iommu/vt-d: Fix incorrect pci_for_each_dma_alias() for non-PCI devices
CVE-2023-52920 7.8 HIGH bpf: support non-r10 register spill/fill to/from stack in precision tracking
CVE-2024-50091 7.8 HIGH dm vdo: don't refer to dedupe_context after releasing it
CVE-2024-50114 7.8 HIGH KVM: arm64: Unregister redistributor for failed vCPU creation
CVE-2024-50127 7.8 HIGH net: sched: fix use-after-free in taprio_change()
CVE-2024-50126 7.8 HIGH net: sched: use RCU read-side critical section in taprio_dump()
CVE-2024-50128 7.8 HIGH net: wwan: fix global oob in wwan_rtnl_policy
CVE-2024-50130 7.8 HIGH netfilter: bpf: must hold reference on net namespace
CVE-2024-50090 7.8 HIGH drm/xe/oa: Fix overflow in oa batch buffer
CVE-2024-50095 7.5 HIGH RDMA/mad: Improve handling of timed out WRs of mad agent
CVE-2024-50099 7.3 HIGH arm64: probes: Remove broken LDR (literal) uprobe support
CVE-2024-50131 7.3 HIGH tracing: Consider the NULL character when validating the event length
CVE-2024-50117 7.3 HIGH drm/amd: Guard against bad data for ATIF ACPI method
CVE-2024-50096 7.3 HIGH nouveau/dmem: Fix vulnerability in migrate_to_ram upon copy error

Showing top 20 of 50 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-50094

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