Is there a patch available for CVE-2026-98570?

Yes, a patch is available for CVE-2026-98570. Update the affected software to the latest version immediately.

Linux CVE-2026-98570

EUVD-2026-103615

2026-10-18 Linux

GHSA-4prh-wfp5-28j7

Information Disclosure Linux

View

Monitor Track and reassess. Why: No CVSS yet + weak signal (CWE or non-zero EPSS).

Patch available 0.2% exploitation probability (EPSS)

Get an e-mail when this CVE is exploited, patched or re-scored. Free account.

Alert me

AnalysisCVE.org

In the Linux kernel, the following vulnerability has been resolved:

net: ipv6: keep room for the mac header in dst_dev_overhead()

The seg6, ioam6 and rpl lwtunnels size their skb_cow_head() request as the length they are about to push plus dst_dev_overhead(), then push the new headers and rebuild the mac header below them with skb_mac_header_rebuild(). That rebuild needs skb->mac_len of headroom, but dst_dev_overhead() leaves LL_RESERVED_SPACE() of the egress device, 16 bytes for plain Ethernet.

Where the mac header is longer than that, as it is on ingress through a VLAN device with reorder_hdr off, the rebuild runs out of room: skb_set_mac_header(skb, -skb->mac_len) computes a negative offset, stores it unchecked in the u16 skb->mac_header, and the memmove that follows writes skb->mac_len bytes about 64 KB past skb->head. Forwarding plain ping6 traffic through such a device reproduces it on all five seg6 encapsulation modes and on the rpl and ioam6 inline paths; skb->mac_header comes back as 65534 on a 704-byte head.

Return the larger of the two. The helper already returns skb->mac_len when it has no dst, so this only makes the other branch agree, and it covers every caller rather than each call site in turn.

Affected VersionsENISA

Linux b26f015dfb07b6be12d005a0ed0c5c43b7bedbf3

Linux 4a855c5aec41bf84922224ab7a74e088776e3ac4

Linux 4c12c3c8abd8b888945d31e7bdbb0d8b73032fc5

Linux patch: 0

Linux 5.15.179 <5.16

Linux 25d8e065c7972dc98fd7a4cac322d5367eaede88

Linux 5.10.235 <5.11

Linux 6.14

Linux patch: 7.3-rc5

Linux 2fcc9f3798ef82399564d247458e69abd10e683b

Linux 6.1.130 <6.2

Linux ab9de9c48316d2622d3bf353916b99971570e2c9

Linux 634710a372ba65bee667c2f6e58a97658c639eab

Linux patch: 7.2.9

Linux 6.13.4 <6.14

Linux 6.6.81 <6.7

Linux dce525185bc92864e5a318040285ee070563fe34 <36c07127924f11fc5741a780abcaaf808fe9ef13

Linux c432cd18a07b623651ed15ea167bd303467004cc

Linux 371d8dc298b4f59e99b4564ac5d906fce0932c69

Linux 8471e228448a818e4c27cab4b681b2e758e46cf5

Linux dce525185bc92864e5a318040285ee070563fe34 <87cd6b717e4069dca34e0866e57eaeb44d3b173e

Linux a9f0407414e16176fdbbbd298c9e18d6dfdf96bc

Linux c0b11dc50590e10590b39dcda79835cd32f49d00

Linux c447c5a9c47bb4858ab12bf90879fe595d2b7f46

Linux 6.12.16 <6.13

Affected Packages

euvd linux fix: 5.11, 5.16, 6.2, 6.7, 6.13, 6.14

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Know when the next one hits your stack

Watch products and get an email when something new is published
Check this CVE against your own stack and servers
Exploit and PoC references, threat intelligence from 22 sources

Continue with Google Continue with GitHub

No credit card · 7-day full trial

Lifecycle Timeline

Patch available

Oct 18, 2026 - 16:02 EUVD

CVE Published

Oct 18, 2026 - 15:18 cve.org

UNKNOWN (no severity yet)

Threat Intelligence Overview

EPSS Score

0.2%

Top 92% exploitable

Data Quality

3 sources

Confidence: Low

EUVD

CVE.org

EPSS MSRC

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity Not scored yet

CISA KEV No

Public POC No

EPSS 0.2%

Patch available Yes

Active threat No

Deciding rule

No CVSS yet + weak signal (CWE or non-zero EPSS)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.