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Noroxi
NVD / CVE Program· CNA Linux

CVE-2026-68476: ipvs: reload ip header after head reallocation

Noroxi assessment

Priority: Monitor (action score 39/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.71% (FIRST EPSS); higher than 53.7% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 3fb7edd2018bb1ad0a68157383d9b9dac33dd645, 4f2d1151421520d7ae16ca8d367d0ca09f5dfbd7, 657118cad620172dfd8f6ed5717fd75c0d1f7a5a.

Low priority for now. Upgrade to Linux Linux 3fb7edd2018bb1ad0a68157383d9b9dac33dd645, 4f2d1151421520d7ae16ca8d367d0ca09f5dfbd7, 657118cad620172dfd8f6ed5717fd75c0d1f7a5a or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: ipvs: reload ip header after head reallocation __ip_vs_get_out_rt() calls skb_ensure_writable() which may reallocate skb->head.

CriticalCVSS 9.8 · v3.1—No exploit Fix available
Published
Aug 15, 2026
Updated
Sep 2, 2026
EPSS
0.7% · 53th percentile
CWE
—

Report tools

JSON

Action score

39

Monitor

Low priority for now.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.7%

CNA vs NVD score

NVD
—
CNA · Linux
9.8
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-68476

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 4.10affected
    • 8d8e20e2d7bba8c50e64e0eca1cb83956f468e49 and later · before 4f2d1151421520d7ae16ca8d367d0ca09f5dfbd7affected · git
    • 8d8e20e2d7bba8c50e64e0eca1cb83956f468e49 and later · before 657118cad620172dfd8f6ed5717fd75c0d1f7a5aaffected · git
    • 8d8e20e2d7bba8c50e64e0eca1cb83956f468e49 and later · before a10f5080afbed242640f2984328de25f84557da1affected · git
    • 8d8e20e2d7bba8c50e64e0eca1cb83956f468e49 and later · before ac6ac3d35bfc0ade9d17d354c84e503a946ebdabaffected · git
    • 8d8e20e2d7bba8c50e64e0eca1cb83956f468e49 and later · before e51687fc56c2e39ea6e9532925f1aabd4d529f61affected · git
    • 8d8e20e2d7bba8c50e64e0eca1cb83956f468e49 and later · before 3fb7edd2018bb1ad0a68157383d9b9dac33dd645affected · git
    • 8d8e20e2d7bba8c50e64e0eca1cb83956f468e49 and later · before ad1e14710b360bda087ebf9fb82460eb5ef775deaffected · git
    • 8d8e20e2d7bba8c50e64e0eca1cb83956f468e49 and later · before a2f57827bf7c695b8c72dc4511cae8e86582369daffected · git
    • before 4.10not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:8bpftoolbefore 4.18.0-553.178.1.el8_104.18.0-553.178.1.el8_10
AlmaLinux:8kernelbefore 4.18.0-553.178.1.el8_104.18.0-553.178.1.el8_10
AlmaLinux:8kernel-abi-stablelistsbefore 4.18.0-553.178.1.el8_104.18.0-553.178.1.el8_10
AlmaLinux:8kernel-corebefore 4.18.0-553.178.1.el8_104.18.0-553.178.1.el8_10
AlmaLinux:8kernel-cross-headersbefore 4.18.0-553.178.1.el8_104.18.0-553.178.1.el8_10
AlmaLinux:8kernel-debugbefore 4.18.0-553.178.1.el8_104.18.0-553.178.1.el8_10
AlmaLinux:8kernel-debug-corebefore 4.18.0-553.178.1.el8_104.18.0-553.178.1.el8_10
AlmaLinux:8kernel-debug-develbefore 4.18.0-553.178.1.el8_104.18.0-553.178.1.el8_10
AlmaLinux:8kernel-debug-modulesbefore 4.18.0-553.178.1.el8_104.18.0-553.178.1.el8_10
AlmaLinux:8kernel-debug-modules-extrabefore 4.18.0-553.178.1.el8_104.18.0-553.178.1.el8_10
AlmaLinux:8kernel-develbefore 4.18.0-553.178.1.el8_104.18.0-553.178.1.el8_10
AlmaLinux:8kernel-docbefore 4.18.0-553.178.1.el8_104.18.0-553.178.1.el8_10
AlmaLinux:8kernel-headersbefore 4.18.0-553.178.1.el8_104.18.0-553.178.1.el8_10
AlmaLinux:8kernel-modulesbefore 4.18.0-553.178.1.el8_104.18.0-553.178.1.el8_10
AlmaLinux:8kernel-modules-extrabefore 4.18.0-553.178.1.el8_104.18.0-553.178.1.el8_10
AlmaLinux:8kernel-rtbefore 4.18.0-553.178.1.rt7.519.el8_104.18.0-553.178.1.rt7.519.el8_10
AlmaLinux:8kernel-rt-corebefore 4.18.0-553.178.1.rt7.519.el8_104.18.0-553.178.1.rt7.519.el8_10
AlmaLinux:8kernel-rt-debugbefore 4.18.0-553.178.1.rt7.519.el8_104.18.0-553.178.1.rt7.519.el8_10
AlmaLinux:8kernel-rt-debug-corebefore 4.18.0-553.178.1.rt7.519.el8_104.18.0-553.178.1.rt7.519.el8_10
AlmaLinux:8kernel-rt-debug-develbefore 4.18.0-553.178.1.rt7.519.el8_104.18.0-553.178.1.rt7.519.el8_10
AlmaLinux:8kernel-rt-debug-modulesbefore 4.18.0-553.178.1.rt7.519.el8_104.18.0-553.178.1.rt7.519.el8_10
AlmaLinux:8kernel-rt-debug-modules-extrabefore 4.18.0-553.178.1.rt7.519.el8_104.18.0-553.178.1.rt7.519.el8_10
AlmaLinux:8kernel-rt-develbefore 4.18.0-553.178.1.rt7.519.el8_104.18.0-553.178.1.rt7.519.el8_10
AlmaLinux:8kernel-rt-modulesbefore 4.18.0-553.178.1.rt7.519.el8_104.18.0-553.178.1.rt7.519.el8_10

+92

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-68474Aug 15, 2026 · powerpc/spufs: fix out-of-bounds access in spufs_mem_mmap_access()
    31Monitor
  • ← EarlierCVE-2026-68475Aug 15, 2026 · reset: sunxi: fix memory region leak on ioremap failure
    0Monitor
  • Later →CVE-2026-68478Aug 15, 2026 · memstick: ms_block: reject a card that reports too many blocks
    0Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux3fb7edd2018bb1ad0a68157383d9b9dac33dd645Vendor (CNA)
Linux Linux4f2d1151421520d7ae16ca8d367d0ca09f5dfbd7Vendor (CNA)
Linux Linux657118cad620172dfd8f6ed5717fd75c0d1f7a5aVendor (CNA)
Linux Linuxa10f5080afbed242640f2984328de25f84557da1Vendor (CNA)
Linux Linuxa2f57827bf7c695b8c72dc4511cae8e86582369dVendor (CNA)
Linux Linuxac6ac3d35bfc0ade9d17d354c84e503a946ebdabVendor (CNA)
Linux Linuxad1e14710b360bda087ebf9fb82460eb5ef775deVendor (CNA)
Linux Linuxe51687fc56c2e39ea6e9532925f1aabd4d529f61Vendor (CNA)
almalinux:bpftool4.18.0-553.178.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel4.18.0-553.178.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt4.18.0-553.178.1.rt7.519.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-core4.18.0-553.178.1.rt7.519.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug4.18.0-553.178.1.rt7.519.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug-core4.18.0-553.178.1.rt7.519.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug-devel4.18.0-553.178.1.rt7.519.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug-modules4.18.0-553.178.1.rt7.519.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug-modules-extra4.18.0-553.178.1.rt7.519.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-devel4.18.0-553.178.1.rt7.519.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-modules4.18.0-553.178.1.rt7.519.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-modules-extra4.18.0-553.178.1.rt7.519.el8_10 · AlmaLinux:8Package registry (OSV)
debian:linux6.1.187-1 · Debian:12Package registry (OSV)
rocky linux:kernel0:4.18.0-553.178.1.el8_10 · Rocky Linux:8Package registry (OSV)
rocky linux:kernel-rt0:4.18.0-553.178.1.rt7.519.el8_10 · Rocky Linux:8Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days+1% in 7 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records