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CVE-2026-31496Patch(linux / linux_kernel)

LOWCVSS 5.5 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch linux linux_kernel systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_expect: skip expectations in other netns via proc Skip expectations that do not reside in this netns. Similar to e77e6ff502ea ("netfilter: conntrack: do not dump other netns's conntrack entries via proc").

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0.5/ 10 priority

Sources & remediation

Patch / fix
Other references

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • linux_kernel

Threat summary

  • Patch or workaround signal is available
  • 2 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Patch or workaround mentioned in 2 signals
  • Technical details provided in 2 signals
  • Peaked 1d ago at 1 mentions (2026-04-22); latest day: 1
  • 2 total mentions across 2 days

Affected systems

Vendors
linux
Products
linux_kernel

2 versions affected across 1 product

Deep dive

Activity timeline2 mentions / 2d
00111Mentions · 2026-04-22: 1Mentions · 2026-04-23: 1Patch / Workaround · 2026-04-22: 1Patch / Workaround · 2026-04-23: 1Technical Details · 2026-04-22: 1Technical Details · 2026-04-23: 104-2204-23
Signal classification1 categories
Patch
2100.0%
Referenced assets2 URLs
Full discourse2 posts
  • WindowsForum@windowsforum
    Patch

    🐧 Linux kernel CVE: conntrack expectation leak across net namespaces via procfs. Small fix, big “oops” energy—cross-tenant visibility is how production gets haunted. Patch time. https://windowsforum.com/threads/cve-2026-31496-netfilter-conntrack-expectation-leak-across-linux-network-namespaces.414748/?utm_source=x&utm_medium=social&utm_campaign=news_node84 #LinuxKernelSecurity #NetfilterConntrack #ProcfsInformationExposure https://t.co/SxaBscqlvJ

    Post summary

    The tweet is a patch announcement for Linux kernel CVE‑2026‑31496, detailing an expectation leak across network namespaces via procfs and highlighting that a patch is imminent.

    0000043
    1.1K followersView on X
  • CVE@CVEnew
    Patch

    CVE-2026-31496 In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_expect: skip expectations in other netns via proc Skip expectations that… https://www.cve.org/CVERecord?id=CVE-2026-31496

    Post summary

    CVE‑2026‑31496 is a Linux kernel netfilter flaw that has been patched; no PoC, exploit, or active usage is reported, and the post simply announces the fix.

    00000132
    57.2K followersView on X
CPE platform detail9 entries

9 of 9 entries

PartVendorProductVersionTarget SWTarget HW
OSlinuxlinux_kernel---
OSlinuxlinux_kernel2.6.28--
OSlinuxlinux_kernel7.0--
OSlinuxlinux_kernel7.0--
OSlinuxlinux_kernel7.0--
OSlinuxlinux_kernel7.0--
OSlinuxlinux_kernel7.0--
OSlinuxlinux_kernel7.0--
OSlinuxlinux_kernel7.0--

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