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CVE-2026-72035— net/sched: sch_taprio: Replace direct dequeue call with peek and qdisc_dequeue_peeked

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基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于sch_taprio软件路径直接调用子qdisc的dequeue操作，忽略了已peek的skb，可能导致qlen/backlog不同步并引发空指针解引用，导致内核崩溃。

CVSS 8.2 · High EPSS 0.57% · P45

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 5a781ccbd19e4664babcbe4b4ead7aa2b9283d22< 51f8af240aed903e988755af33d7491030b50ae9 affected
5a781ccbd19e4664babcbe4b4ead7aa2b9283d22< 17ab5f76f3899f67e5569722f334591f4b88b17b affected
5a781ccbd19e4664babcbe4b4ead7aa2b9283d22< f60d5c12e0551012cee5c272b0bcbcc78f7bb506 affected
5a781ccbd19e4664babcbe4b4ead7aa2b9283d22< 6ee5a7665a9080bcb05d703bf981a579436fd05e affected
5a781ccbd19e4664babcbe4b4ead7aa2b9283d22< 18d580cb00c55805633bae45e90cf22ed6b8e424 affected
5a781ccbd19e4664babcbe4b4ead7aa2b9283d22< e2b7ee61989f2d39df6c2cc06f9db1aea69bdb09 affected
5a781ccbd19e4664babcbe4b4ead7aa2b9283d22< 2dcebbd1ad2e180fe7b98bf346ced69a872e11e6 affected
5a781ccbd19e4664babcbe4b4ead7aa2b9283d22< e056e1dfcddca877dd46d704e8ec9860cfc9ec44 affected
… +10 more rows
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I. Basic Information for CVE-2026-72035

Vulnerability Information
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Vulnerability Title
net/sched: sch_taprio: Replace direct dequeue call with peek and qdisc_dequeue_peeked
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net/sched: sch_taprio: Replace direct dequeue call with peek and qdisc_dequeue_peeked When taprio's software path peeks a non-work-conserving child qdisc, the child stashes the peeked skb in its gso_skb; taprio_dequeue_from_txq() then takes the packet with a direct child ->dequeue() call, which ignores that stash, orphans the peeked skb and desyncs the child's qlen/backlog. With a qfq child this re-enters the child on an emptied list and dereferences NULL, panicking the kernel from softirq on ordinary egress. Take the packet through qdisc_dequeue_peeked(), as sch_red and sch_sfb now do. The helper returns the child's stashed skb first and is a no-op when there is none, so a work-conserving child is unaffected and the gated path now consumes the skb whose length was charged to the budget.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/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基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于sch_taprio软件路径直接调用子qdisc的dequeue操作，忽略了已peek的skb，可能导致qlen/backlog不同步并引发空指针解引用，导致内核崩溃。
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 5a781ccbd19e4664babcbe4b4ead7aa2b9283d22 ~ 51f8af240aed903e988755af33d7491030b50ae9 -
Linux Linux 4.20 -

II. Public POCs for CVE-2026-72035

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III. Intelligence Information for CVE-2026-72035

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Patches & Fixes for CVE-2026-72035 (7)

Same Patch Batch · Linux · 2026-08-15 · 845 CVEs total

CVE-2026-74475 10.0 CRITICAL vxlan: use neigh_ha_snapshot() in route_shortcircuit()
CVE-2026-74279 10.0 CRITICAL crypto: cavium/cpt - fix DMA cleanup using wrong loop index
CVE-2026-74280 10.0 CRITICAL crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
CVE-2026-74309 10.0 CRITICAL vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
CVE-2026-72407 10.0 CRITICAL geneve: validate inner network offset in geneve_gro_complete()
CVE-2026-72408 10.0 CRITICAL geneve: gate GRO hint in geneve_gro_complete() on gs->gro_hint
CVE-2026-72421 10.0 CRITICAL ipv4: fib: Don't ignore error route in local/main tables.
CVE-2026-72493 9.9 CRITICAL net: serialize netif_running() check in enqueue_to_backlog()
CVE-2026-72451 9.8 CRITICAL xfrm: Fix xfrm state cache insertion race
CVE-2026-72323 9.8 CRITICAL ipv4: igmp: Fix potential UAF in igmp_gq_start_timer()
CVE-2026-72322 9.8 CRITICAL ipv6: mcast: Fix potential UAF in MLD delayed work
CVE-2026-72436 9.8 CRITICAL netfilter: ipset: Don't use test_bit() in lockless RCU readers in hash types
CVE-2026-72129 9.8 CRITICAL nvmet-rdma: handle inline data with a nonzero offset
CVE-2026-72130 9.8 CRITICAL nvmet-auth: reject short AUTH_RECEIVE buffers
CVE-2026-72206 9.8 CRITICAL ntfs: validate index block header more strictly
CVE-2026-74384 9.8 CRITICAL nvme-multipath: fix flex array size in struct nvme_ns_head
CVE-2026-72319 9.8 CRITICAL ipvs: ensure inner headers in ICMP errors are in headroom
CVE-2026-72317 9.8 CRITICAL SUNRPC: pin upper rpc_clnt across the TLS connect_worker
CVE-2026-72137 9.8 CRITICAL xfrm: nat_keepalive: avoid double free on send error
CVE-2026-74433 9.8 CRITICAL rxrpc: Fix UAF in rxgk_issue_challenge()

Showing top 20 of 845 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-72035

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