VulnerabilityPublished 18 Oct 2026

CVE-2026-98627: Linux kernel · bpf: Preserve packet pointer class displacement in regsafe()

Source GCVE Database

Authoritative record:CVE-2026-98627· High

Not known to be exploited : upgrade to fd16449a9b3b31a8f18944c2f0e29e4e218ca2cf or 091b40845bd3cf96791171ca95113e9184ccb596 soon.

Data as of 26 Oct 2026, 14:05 UTC

Severity

High

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 4% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in fd16449a9b3b31a8f18944c2f0e29e4e218ca2cf, 091b40845bd3cf96791171ca95113e9184ccb596

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-p3gw-45vq-6cwq

What to do

Upgrade Linux kernel to fd16449a9b3b31a8f18944c2f0e29e4e218ca2cf or 091b40845bd3cf96791171ca95113e9184ccb596.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 022ac075088366b62e130da5e1b200bc93a47191, < fd16449a9b3b31a8f18944c2f0e29e4e218ca2cf	Fixed in fd16449a9b3b31a8f18944c2f0e29e4e218ca2cf
LinuxLinux	Affected ≥ 022ac075088366b62e130da5e1b200bc93a47191, < 091b40845bd3cf96791171ca95113e9184ccb596	Fixed in 091b40845bd3cf96791171ca95113e9184ccb596
LinuxLinux	Affected =7.1	Fixed in–

AI-suggested

A fix has been implemented in the Linux kernel to address this issue by requiring matching range bases for packet pointers sharing an ID. Users should apply the official kernel updates containing this fix when available. Patch status is not explicitly confirmed in the provided data; therefore, verify the vendor advisory for current remediation guidance.

Description

A vulnerability in the Linux kernel's BPF verifier related to packet pointer displacement handling has been resolved. The regsafe() function did not preserve displacement between registers sharing a packet pointer ID, allowing an out-of-bounds packet access. The fix requires matching range bases for packet pointers with the same ID to prevent unsound bounds checks.

References

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