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CVE-2024-40931— mptcp: ensure snd_una is properly initialized on connect

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 mptcp 组件在连接时，未能正确初始化 snd_una。

AI Predicted 7.5 Difficulty: Moderate EPSS 0.26% · P16

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux 8fd738049ac3d67a937d36577763b47180aae1ad< 208cd22ef5e57f82d38ec11c1a1703f9401d6dde affected
8fd738049ac3d67a937d36577763b47180aae1ad< 7b9c7fc8600b64a86e4b47b2d190bba380267726 affected
8fd738049ac3d67a937d36577763b47180aae1ad< f03c46eabb3a67bd2993e237ab5517f00a5f1813 affected
8fd738049ac3d67a937d36577763b47180aae1ad< f1f0a46f8bb8890b90ab7194f0a0c8fe2a3fb57f affected
8fd738049ac3d67a937d36577763b47180aae1ad< ef473bf1dd7e8dd08bcc04b9e2d1bfed69a0a7ce affected
8fd738049ac3d67a937d36577763b47180aae1ad< 8031b58c3a9b1db3ef68b3bd749fbee2e1e1aaa3 affected
5.9 affected
< 5.9 unaffected
… +6 more rows
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I. Basic Information for CVE-2024-40931

Vulnerability Information
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Vulnerability Title
mptcp: ensure snd_una is properly initialized on connect
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: mptcp: ensure snd_una is properly initialized on connect This is strictly related to commit fb7a0d334894 ("mptcp: ensure snd_nxt is properly initialized on connect"). It turns out that syzkaller can trigger the retransmit after fallback and before processing any other incoming packet - so that snd_una is still left uninitialized. Address the issue explicitly initializing snd_una together with snd_nxt and write_seq.
Source: CVE Program / CVE List V5
CVSS Information
N/A
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 mptcp 组件在连接时，未能正确初始化 snd_una。
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 8fd738049ac3d67a937d36577763b47180aae1ad ~ 208cd22ef5e57f82d38ec11c1a1703f9401d6dde -
Linux Linux 5.9 -

II. Public POCs for CVE-2024-40931

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III. Intelligence Information for CVE-2024-40931

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Other References for CVE-2024-40931 (6)

Same Patch Batch · Linux · 2024-07-12 · 122 CVEs total

CVE-2024-40999 9.8 CRITICAL net: ena: Add validation for completion descriptors consistency
CVE-2024-40907 9.8 CRITICAL ionic: fix kernel panic in XDP_TX action
CVE-2024-40923 9.8 CRITICAL vmxnet3: disable rx data ring on dma allocation failure
CVE-2024-40983 9.8 CRITICAL tipc: force a dst refcount before doing decryption
CVE-2024-40937 9.8 CRITICAL gve: Clear napi->skb before dev_kfree_skb_any()
CVE-2024-40910 8.8 HIGH ax25: Fix refcount imbalance on inbound connections
CVE-2024-40911 8.8 HIGH wifi: cfg80211: Lock wiphy in cfg80211_get_station
CVE-2024-40941 8.1 HIGH wifi: iwlwifi: mvm: don't read past the mfuart notifcation
CVE-2024-40953 7.9 HIGH KVM: Fix a data race on last_boosted_vcpu in kvm_vcpu_on_spin()
CVE-2024-40954 7.8 HIGH net: do not leave a dangling sk pointer, when socket creation fails
CVE-2024-40918 7.8 HIGH parisc: Try to fix random segmentation faults in package builds
CVE-2024-40924 7.8 HIGH drm/i915/dpt: Make DPT object unshrinkable
CVE-2024-40925 7.8 HIGH block: fix request.queuelist usage in flush
CVE-2024-40943 7.8 HIGH ocfs2: fix races between hole punching and AIO+DIO
CVE-2024-40947 7.8 HIGH ima: Avoid blocking in RCU read-side critical section
CVE-2024-40949 7.8 HIGH mm: shmem: fix getting incorrect lruvec when replacing a shmem folio
CVE-2024-40990 7.8 HIGH RDMA/mlx5: Add check for srq max_sge attribute
CVE-2024-40986 7.8 HIGH dmaengine: xilinx: xdma: Fix data synchronisation in xdma_channel_isr()
CVE-2024-40989 7.8 HIGH KVM: arm64: Disassociate vcpus from redistributor region on teardown
CVE-2024-40984 7.8 HIGH ACPICA: Revert "ACPICA: avoid Info: mapping multiple BARs. Your kernel is fine."

Showing top 20 of 122 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-40931

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