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NVD / CVE Program· CNA Linux

CVE-2026-72319: ipvs: ensure inner headers in ICMP errors are in headroom

CriticalCVSS 9.8 · v3.1—No exploit Fix available

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: 0.74% (FIRST EPSS); higher than 55.2% 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.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: Linux Linux 19657b3a17b774ae4e2f2635b5ae8638c9344a40, 3f7a535ff0fa627a0132803e4c2f903ceffcbc1c, 8f48cfe657409fb5c7ba0521b14da6d47546d9cf.

Low priority for now. Upgrade to Linux Linux 19657b3a17b774ae4e2f2635b5ae8638c9344a40, 3f7a535ff0fa627a0132803e4c2f903ceffcbc1c, 8f48cfe657409fb5c7ba0521b14da6d47546d9cf 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: ensure inner headers in ICMP errors are in headroom Sashiko points out that after stripping the outer headers with pskb_pull() we should ensure the inner IP headers in ICMP errors from tunnels are present in the skb headroom for functions like ipv4_update_pmtu(), icmp_send() and IP_VS_DBG(). Also, add more checks for the length of the inner headers.

Published
Aug 15, 2026
Updated
Oct 16, 2026
EPSS
0.7% · 55th 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%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

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-2026-72319

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

    • 3.7affected
    • f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e and later · before 19657b3a17b774ae4e2f2635b5ae8638c9344a40affected · git
    • f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e and later · before dac813101914c21219ac221a60a31a11bc90e7ecaffected · git
    • f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e and later · before dd22f74a09e25ca298ced0a3763ef353242cb78daffected · git
    • f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e and later · before 9bc9b95aee2b2e3f1301a16a67ee504960402875affected · git
    • f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e and later · before a735f9964a3d9ed97daf9b08507f8b5bcafe6326affected · git
    • f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e and later · before 8f48cfe657409fb5c7ba0521b14da6d47546d9cfaffected · git
    • f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e and later · before 92185d6f7819bc558939ae83de7b1abe90e3b5c2affected · git
    • f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e and later · before 3f7a535ff0fa627a0132803e4c2f903ceffcbc1caffected · git
    • before 3.7not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.180-16.1.180-1
Debian:13linuxbefore 6.12.100-16.12.100-1
Debian:14linuxbefore 7.1.5-17.1.5-1

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-2026-72317Aug 15, 2026 · SUNRPC: pin upper rpc_clnt across the TLS connect_worker
    39Monitor
  • ← EarlierCVE-2026-72318Aug 15, 2026 · cifs: validate DFS referral string offsets
    37Monitor
  • Later →CVE-2026-72320Aug 15, 2026 · netfilter: nft_lookup: fix catchall element handling with inverted lookups
    36Monitor

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 Linux19657b3a17b774ae4e2f2635b5ae8638c9344a40Vendor (CNA)
Linux Linux3f7a535ff0fa627a0132803e4c2f903ceffcbc1cVendor (CNA)
Linux Linux8f48cfe657409fb5c7ba0521b14da6d47546d9cfVendor (CNA)
Linux Linux92185d6f7819bc558939ae83de7b1abe90e3b5c2Vendor (CNA)
Linux Linux9bc9b95aee2b2e3f1301a16a67ee504960402875Vendor (CNA)
Linux Linuxa735f9964a3d9ed97daf9b08507f8b5bcafe6326Vendor (CNA)
Linux Linuxdac813101914c21219ac221a60a31a11bc90e7ecVendor (CNA)
Linux Linuxdd22f74a09e25ca298ced0a3763ef353242cb78dVendor (CNA)
debian:linux6.1.180-1 · Debian:12Package 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).

Not on record for this CVE: patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

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.

References

Show all references (7 more)

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

All records