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CVE-2026-74464— net: openvswitch: fix skb leak on flow key update failure during ct

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 4.3版本存在安全漏洞，该漏洞源于openvswitch的ct处理中流键更新失败时错误处理不当，导致skb内存泄露。

AI Predicted 3.3 Difficulty: Theoretical EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux ec0d043d05e6e3c0c2fac5de922c800c027c6386< b77126b2915900f69f9fcf5d624a77c8e6d50c31 affected
ec0d043d05e6e3c0c2fac5de922c800c027c6386< 6cc523eaee72c4e91894136cff64946ae9de2cda affected
ec0d043d05e6e3c0c2fac5de922c800c027c6386< 22e0ca88090d89c128078062186b03bb5fdc4f98 affected
ec0d043d05e6e3c0c2fac5de922c800c027c6386< 736e972f3f8a304158345223ac6e816166a467ce affected
ec0d043d05e6e3c0c2fac5de922c800c027c6386< e84dfaac50aab45ad8c670da43e3aa1f97bd2a41 affected
ec0d043d05e6e3c0c2fac5de922c800c027c6386< e0ba8eaef2a0d02a7a485e6a7157e47272b65cea affected
ec0d043d05e6e3c0c2fac5de922c800c027c6386< 393f3c72600ab6721d732a0ab245bc896c5b28fc affected
ec0d043d05e6e3c0c2fac5de922c800c027c6386< bc62e843bc48f933da765ce47079fd992e535794 affected
… +10 more rows
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I. Basic Information for CVE-2026-74464

Vulnerability Information
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Vulnerability Title
net: openvswitch: fix skb leak on flow key update failure during ct
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: openvswitch: fix skb leak on flow key update failure during ct ovs_ct_execute() always steals or frees the skb on failure while ovs_flow_key_update() does not. So, if it fails and we return right away, the skb ends up leaked. Fix that by breaking instead and letting the common error handling code at the bottom of the loop to free the skb properly. This is a very unlikely scenario as it requires the packet to become unparseable by applying a set of actions on a previously parseable skb, but should be fixed nevertheless. Reported by Sashiko.
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基金会开源的一个操作系统内核。 Linux kernel 4.3版本存在安全漏洞，该漏洞源于openvswitch的ct处理中流键更新失败时错误处理不当，导致skb内存泄露。
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 ec0d043d05e6e3c0c2fac5de922c800c027c6386 ~ b77126b2915900f69f9fcf5d624a77c8e6d50c31 -
Linux Linux 4.3 -

II. Public POCs for CVE-2026-74464

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III. Intelligence Information for CVE-2026-74464

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Patches & Fixes for CVE-2026-74464 (7)

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

CVE-2026-74309 10.0 CRITICAL vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
CVE-2026-74280 10.0 CRITICAL crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
CVE-2026-74279 10.0 CRITICAL crypto: cavium/cpt - fix DMA cleanup using wrong loop index
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-2026-74475 10.0 CRITICAL vxlan: use neigh_ha_snapshot() in route_shortcircuit()
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-2026-72339 9.8 CRITICAL qede: fix off-by-one in BD ring consumption on build_skb failure
CVE-2026-72234 9.8 CRITICAL batman-adv: access unicast_ttvn skb->data only after skb realloc
CVE-2026-74376 9.8 CRITICAL md/raid10: reset read_slot when reusing r10bio for discard
CVE-2026-74255 9.8 CRITICAL tipc: fix UAF in tipc_l2_send_msg()
CVE-2026-72064 9.8 CRITICAL net: mana: Sync page pool RX frags for CPU
CVE-2026-72065 9.8 CRITICAL net: mana: Validate the packet length reported by the NIC
CVE-2026-72217 9.8 CRITICAL SUNRPC: Bound-check xdr_buf_to_bvec() stores before writing
CVE-2026-74473 9.8 CRITICAL vxlan: use pskb_network_may_pull() in route_shortcircuit()
CVE-2026-72323 9.8 CRITICAL ipv4: igmp: Fix potential UAF in igmp_gq_start_timer()
CVE-2026-74495 9.8 CRITICAL igbvf: Fix leak in TX DMA error cleanup
CVE-2026-72463 9.8 CRITICAL xfrm: Fix dev use-after-free in xfrm async resumption
CVE-2026-72069 9.8 CRITICAL locking/rt: Fix the incorrect RCU protection in rt_spin_unlock()

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-2026-74464

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