VulnSocial

CVE-2026-53363Disclosure(linux / linux_kernel)

LOWCVSS 9.8 · CRITICAL

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: xfrm: iptfs: preserve shared-frag marker in iptfs_consume_frags() iptfs_consume_frags() transfers paged fragments from one socket buffer to another but fails to propagate the SKBFL_SHARED_FRAG flag. This is the same class of bug that was fixed in skb_try_coalesce() for CVE-2026-46300: when fragments backed by read-only page-cache pages are merged, the marker indicating their shared nature must be preserved so that ESP can decide correctly whether in-place encryption is safe. Apply the same two-line fix used in skb_try_coalesce() to iptfs_consume_frags().

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0.5/ 10 priority

Sources & remediation

Patch / fix

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
  • 3 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 1 signal
  • Disclosure: 1 classified signal
  • General: 1 classified signal
  • Peaked 1d ago at 2 mentions (2026-07-10); latest day: 1
  • 3 total mentions across 2 days

Affected systems

Vendors
linux
Products
linux_kernel

1 version affected across 1 product

Deep dive

Activity timeline3 mentions / 2d
01122Mentions · 2026-07-10: 2Mentions · 2026-07-26: 1Patch / Workaround · 2026-07-26: 1Technical Details · 2026-07-26: 107-1007-26
Signal classification3 categories
Disclosure
133.3%
General
133.3%
Patch
133.3%
Referenced assets2 URLs
Classification over time
DateTotalLabels
2026-07-102
Disclosure1General1
2026-07-261
Patch1
Full discourse3 posts
  • DFIR Lab@DFIR_Lab
    Patch

    🚨 CRITICAL: CVE-2026-53363 (CVSS 9.8) Linux kernel xfrm iptfs vulnerability allows network-based attacks with no user interaction. Affects fragment handling in iptfs_consume_frags(). Patch immediately. #CVE #Vulnerability #PatchNow #ThreatIntel https://t.co/arnirY58fQ

    Post summary

    The tweet highlights the critical CVE-2026-53363 Linux kernel vulnerability and urgently recommends patching it.

    0000057
    96 followersView on X
  • VulDB 🛡@vuldb
    General

    A severe vulnerability was disclosed for Linux Kernel (CVE-2026-53363) https://vuldb.com/vuln/377533

    Post summary

    The text merely announces that a severe Linux Kernel vulnerability (CVE-2026-53363) has been disclosed, without providing further details such as PoC, exploit, or remediation.

    00000155
    2.3K followersView on X
  • MalwareObserver@MalwareObserver
    Disclosure

    🐛 VULNERABILITIES CVE Notify: 🚨 [CVE-2026-53363](https://git.kernel.org/stable/c/c885d111ed9f5a0a1f3cc4e87a50db6518abaa6c) In the... https://git.kernel.org/stable/c/c885d111ed9f5a0a1f3cc4e87a50db6518abaa6c #PatchManagement #Vulnerability #CVE

    Post summary

    The post announces CVE-2026-53363, providing a link to its kernel source repository but offering no additional technical or exploit details.

    0000041
    10 followersView on X
CPE platform detail8 entries

8 of 8 entries

PartVendorProductVersionTarget SWTarget HW
OSlinuxlinux_kernel---
OSlinuxlinux_kernel7.1--
OSlinuxlinux_kernel7.1--
OSlinuxlinux_kernel7.1--
OSlinuxlinux_kernel7.1--
OSlinuxlinux_kernel7.1--
OSlinuxlinux_kernel7.1--
OSlinuxlinux_kernel7.1--

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