[NEW] [medium] Linux Kernel (xfrm: iptfs): Vulnerability allows DoS and data manipulation

mediumCVE-2026-53363

A local attacker can exploit a vulnerability in Linux Kernel to potentially trigger a denial-of-service condition or manipulate data.

CSIRTS triage

vendor: Linux product: Linux Kernel Denial of serviceOther

What: A vulnerability allows a local attacker to potentially trigger a denial-of-service condition or manipulate data.
Who is affected: Local users of the Linux Kernel are affected.
Urgency: Remediation is medium urgency due to the potential for denial-of-service.
Action: Monitor for patches or updates to the Linux Kernel.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity: medium
Published: 2026-07-13
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2286

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-533630.29% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 22% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-53363	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

unknownCVE-2026-53363: In the Linux kernel, the following vulnerability has been resolved: xfrm: iptfs: preserve shar…nvd

Recent advisories for Linux Kernel (xfrm

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

unknownCVE-2026-64525: In the Linux kernel, the following vulnerability has been resolved: xfrm: move policy_bydst RC…nvd · 2026-07-25
highCVE-2026-64522: In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix eswitch mod…nvd · 2026-07-25
highCVE-2026-64009: In the Linux kernel, the following vulnerability has been resolved: xfrm: Check for underflow …nvd · 2026-07-19
highCVE-2026-63919: In the Linux kernel, the following vulnerability has been resolved: xfrm: input: hold netns du…nvd · 2026-07-19
highCVE-2026-63914: In the Linux kernel, the following vulnerability has been resolved: xfrm: route MIGRATE notifi…nvd · 2026-07-19
criticalCVE-2026-63912: In the Linux kernel, the following vulnerability has been resolved: xfrm: esp: restore combine…nvd · 2026-07-19