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CVE-2026-23139— netfilter: nf_conncount: update last_gc only when GC has been performed

CVSS 7.5 · High EPSS 0.04% · P11
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I. Basic Information for CVE-2026-23139

Vulnerability Information
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Vulnerability Title
netfilter: nf_conncount: update last_gc only when GC has been performed
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conncount: update last_gc only when GC has been performed Currently last_gc is being updated everytime a new connection is tracked, that means that it is updated even if a GC wasn't performed. With a sufficiently high packet rate, it is possible to always bypass the GC, causing the list to grow infinitely. Update the last_gc value only when a GC has been actually performed.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
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nf_conncount模块错误更新last_gc值，可能导致连接列表无限增长和资源耗尽。
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux f106694733c66a48740c25bc4e212e9b2ea364ce ~ 2c7c71113ed6d3e2f3aca4c088f22283016ff34f -
LinuxLinux 5.19 -

II. Public POCs for CVE-2026-23139

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III. Intelligence Information for CVE-2026-23139

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Same Patch Batch · Linux · 2026-02-14 · 108 CVEs total

CVE-2026-231938.8 HIGHscsi: target: iscsi: Fix use-after-free in iscsit_dec_session_usage_count()
CVE-2026-231728.4 HIGHnet: wwan: t7xx: fix potential skb->frags overflow in RX path
CVE-2026-232097.8 HIGHmacvlan: fix error recovery in macvlan_common_newlink()
CVE-2026-231787.8 HIGHHID: i2c-hid: fix potential buffer overflow in i2c_hid_get_report()
CVE-2026-231847.8 HIGHbinder: fix UAF in binder_netlink_report()
CVE-2026-231857.8 HIGHwifi: iwlwifi: mld: cancel mlo_scan_start_wk
CVE-2026-231717.8 HIGHbonding: fix use-after-free due to enslave fail after slave array update
CVE-2026-231697.8 HIGHmptcp: fix race in mptcp_pm_nl_flush_addrs_doit()
CVE-2026-231917.8 HIGHALSA: aloop: Fix racy access at PCM trigger
CVE-2026-231927.8 HIGHlinkwatch: use __dev_put() in callers to prevent UAF
CVE-2026-231987.8 HIGHKVM: Don't clobber irqfd routing type when deassigning irqfd
CVE-2026-231487.5 HIGHnvmet: fix race in nvmet_bio_done() leading to NULL pointer dereference
CVE-2026-231367.5 HIGHlibceph: reset sparse-read state in osd_fault()
CVE-2026-231617.3 HIGHmm/shmem, swap: fix race of truncate and swap entry split
CVE-2026-232047.1 HIGHnet/sched: cls_u32: use skb_header_pointer_careful()
CVE-2026-231957.0 HIGHcgroup/dmem: avoid pool UAF
CVE-2026-231757.0 HIGHnet: cpsw: Execute ndo_set_rx_mode callback in a work queue
CVE-2026-231807.0 HIGHdpaa2-switch: add bounds check for if_id in IRQ handler
CVE-2026-23141btrfs: send: check for inline extents in range_is_hole_in_parent()
CVE-2025-71202iommu/sva: invalidate stale IOTLB entries for kernel address space

Showing top 20 of 108 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-23139

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