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CVE-2024-40996— bpf: Avoid splat in pskb_pull_reason

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 bpf 组件在 pskb_pull_reason 处理中存在调试信息泄露问题。

AI Predicted 5.5 Difficulty: Theoretical EPSS 0.28% · P21

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux 8af60bb2b215f478b886f1d6d302fefa7f0b917d< dacc15e9cb248d19e5fc63c54bef0b9b55007761 affected
1b2b26595bb09febf14c5444c873ac4ec90a5a77< 7f9644782c559635bd676c12c59389a34ed7c866 affected
219eee9c0d16f1b754a8b85275854ab17df0850a< 5e90258303a358e88737afb5048bee9113beea3a affected
219eee9c0d16f1b754a8b85275854ab17df0850a< 2bbe3e5a2f4ef69d13be54f1cf895b4658287080 affected
fff05b2b004d9a8a2416d08647f3dc9068e357c8 affected
6.1.86< 6.1.96 affected
6.6.27< 6.6.36 affected
6.8.6< 6.9 affected
… +6 more rows
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I. Basic Information for CVE-2024-40996

Vulnerability Information
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Vulnerability Title
bpf: Avoid splat in pskb_pull_reason
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Avoid splat in pskb_pull_reason syzkaller builds (CONFIG_DEBUG_NET=y) frequently trigger a debug hint in pskb_may_pull. We'd like to retain this debug check because it might hint at integer overflows and other issues (kernel code should pull headers, not huge value). In bpf case, this splat isn't interesting at all: such (nonsensical) bpf programs are typically generated by a fuzzer anyway. Do what Eric suggested and suppress such warning. For CONFIG_DEBUG_NET=n we don't need the extra check because pskb_may_pull will do the right thing: return an error without the WARN() backtrace.
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 bpf 组件在 pskb_pull_reason 处理中存在调试信息泄露问题。
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 8af60bb2b215f478b886f1d6d302fefa7f0b917d ~ dacc15e9cb248d19e5fc63c54bef0b9b55007761 -
Linux Linux 6.9 -

II. Public POCs for CVE-2024-40996

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III. Intelligence Information for CVE-2024-40996

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Other References for CVE-2024-40996 (4)

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

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-2024-40999 9.8 CRITICAL net: ena: Add validation for completion descriptors consistency
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-2024-39495 7.8 HIGH greybus: Fix use-after-free bug in gb_interface_release due to race condition.
CVE-2024-40943 7.8 HIGH ocfs2: fix races between hole punching and AIO+DIO
CVE-2024-40958 7.8 HIGH netns: Make get_net_ns() handle zero refcount net
CVE-2024-40956 7.8 HIGH dmaengine: idxd: Fix possible Use-After-Free in irq_process_work_list
CVE-2024-40991 7.8 HIGH dmaengine: ti: k3-udma-glue: Fix of_k3_udma_glue_parse_chn_by_id()
CVE-2024-40990 7.8 HIGH RDMA/mlx5: Add check for srq max_sge attribute
CVE-2024-40989 7.8 HIGH KVM: arm64: Disassociate vcpus from redistributor region on teardown
CVE-2024-40986 7.8 HIGH dmaengine: xilinx: xdma: Fix data synchronisation in xdma_channel_isr()
CVE-2024-40918 7.8 HIGH parisc: Try to fix random segmentation faults in package builds
CVE-2024-40947 7.8 HIGH ima: Avoid blocking in RCU read-side critical section
CVE-2024-40979 7.8 HIGH wifi: ath12k: fix kernel crash during resume

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-2024-40996

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