Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-64207— net/sched: dualpi2: fix GSO backlog accounting

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基金会开源的一款操作系统内核。 Linux kernel 6.17版本存在安全漏洞，该漏洞源于DualPI2调度器在处理GSO分割时可能导致GSO积压计数错误，进而导致QFQ父队列在空队列后仍存在非零队列长度，造成空指针取消引用。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.11% · P1

Possible ATT&CK Techniques 1 AI

T1211 · Exploitation for Stealth

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux 8f9516daedd67097a0c6e463fcb7a42b5ee9d477< c4b70c1512b8f9f33f23c2c8196dfd1210207681 affected
8f9516daedd67097a0c6e463fcb7a42b5ee9d477< 806586e33891066487db1f002be3d455cda6b516 affected
8f9516daedd67097a0c6e463fcb7a42b5ee9d477< 05ed733b65ab977dd931e7f7ac0f62fdb81205c2 affected
6.17 affected
< 6.17 unaffected
6.18.39≤ 6.18.* unaffected
7.1.4≤ 7.1.* unaffected
7.2≤ * unaffected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-64207

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
net/sched: dualpi2: fix GSO backlog accounting
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net/sched: dualpi2: fix GSO backlog accounting When DualPI2 splits a GSO skb into N segments, it propagates N additional packets to its parent before returning NET_XMIT_SUCCESS. The parent then accounts for the original skb once more, leaving its qlen one larger than the number of packets actually queued. With QFQ as the parent, after all real packets are dequeued, QFQ still has a non-zero qlen while its in-service aggregate has no active classes. qfq_choose_next_agg() returns NULL and qfq_dequeue() passes the result to qfq_peek_skb(), causing a NULL pointer dereference. Follow the same pattern used by tbf_segment() and taprio: count only successfully queued segments, propagate the difference between the original skb and those segments, and return NET_XMIT_SUCCESS whenever at least one segment was queued.
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基金会开源的一款操作系统内核。 Linux kernel 6.17版本存在安全漏洞，该漏洞源于DualPI2调度器在处理GSO分割时可能导致GSO积压计数错误，进而导致QFQ父队列在空队列后仍存在非零队列长度，造成空指针取消引用。
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 8f9516daedd67097a0c6e463fcb7a42b5ee9d477 ~ c4b70c1512b8f9f33f23c2c8196dfd1210207681 -
Linux Linux 6.17 -

II. Public POCs for CVE-2026-64207

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-64207

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-64207 (3)

Same Patch Batch · Linux · 2026-07-20 · 9 CVEs total

CVE-2026-64206 8.8 HIGH Bluetooth: L2CAP: cancel pending_rx_work before taking conn->lock
CVE-2026-64188 7.8 HIGH net: qualcomm: rmnet: fix endpoint use-after-free in rmnet_dellink()
CVE-2026-64189 7.8 HIGH netfilter: ipset: fix race between dump and ip_set_list resize
CVE-2026-64191 7.8 HIGH i2c: stub: Reject I2C block transfers with invalid length
CVE-2026-64187 xfs: fail recovery on a committed log item with no regions
CVE-2026-64190 net: team: fix NULL pointer dereference in team_xmit during mode change
CVE-2026-64192 bpf: Reject BPF_MAP_TYPE_INODE_STORAGE creation if BPF LSM is uninitialized
CVE-2026-64205 i2c: i801: fix hardware state machine corruption in error path

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-64207

No comments yet

Leave a comment