CVE-2026-64116: ipv6: ioam: add NULL check for idev in ipv6_hop_ioam()
Noroxi assessment
Priority: Monitor (action score 30/100)
- 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: 0.51% (FIRST EPSS).
- 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 09cbfd4b81ae90963dadb1de99b63b702e73290a, 1dca7e491f070ac49b3d934f16ee953a53b37f38, 902daac307eb7e1955ce05b071950f3cba88c963.
Low priority for now. Upgrade to Linux Linux 09cbfd4b81ae90963dadb1de99b63b702e73290a, 1dca7e491f070ac49b3d934f16ee953a53b37f38, 902daac307eb7e1955ce05b071950f3cba88c963 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: ipv6: ioam: add NULL check for idev in ipv6_hop_ioam() Reported by Sashiko: The function ipv6_hop_ioam() accesses __in6_dev_get(skb->dev)->cnf.ioam6_enabled without validating the returned idev pointer. Because addrconf_ifdown() can concurrently clear dev->ip6_ptr via RCU, __in6_dev_get() can return NULL during interface teardown, which could cause a NULL pointer dereference when processing an IOAM Hop-by-Hop option. Let's add a check and use SKB_DROP_REASON_IPV6DISABLED accordingly.
- Published
- Jul 19, 2026
- Updated
- Aug 12, 2026
- EPSS
- 0.5% · 43th percentile
- CWE
- CWE-476
Report tools
Action score
30
Monitor
Low priority for now.
- CVSS
- 30 / 40 · 7.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.5%
CNA vs NVD score
- NVD
- —
- CNA · Linux
- 7.5
- 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.
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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.
We use this product, ask for helpAffected 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.
| Vendor | Product | CPE |
|---|---|---|
| linux | linux kernel | cpe:2.3:o:linux:linux_kernel |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- linux linux kernel5.15 and later · before 5.15.210
- linux linux kernel5.16 and later · before 6.1.176
- linux linux kernel6.2 and later · before 6.6.143
- linux linux kernel6.7 and later · before 6.12.92
- linux linux kernel6.13 and later · before 6.18.34
- linux linux kernel6.19 and later · before 7.0.11
- linux linux kernel7.1
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
- 5.15affected
- 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 and later · before c7e8971abd70e9d022f1c251ba2508f8dc7f2db8affected · git
- 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 and later · before 09cbfd4b81ae90963dadb1de99b63b702e73290aaffected · git
- 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 and later · before 1dca7e491f070ac49b3d934f16ee953a53b37f38affected · git
- 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 and later · before 902daac307eb7e1955ce05b071950f3cba88c963affected · git
- 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 and later · before abdd03229414b5a52943b65a60f34b84cea5ac59affected · git
- 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 and later · before cf75eb6617042c8cff6112daeed7791809fc9dd2affected · git
- 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 and later · before d4ea0dfd75011b78cebf3808f98ac4c4f51a6fb9affected · git
- before 5.15not affected · semver
- 5.15.210 and later · up to and including 5.15.*not affected · semver
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | linux | before 6.1.176-1 | 6.1.176-1 |
| Debian:13 | linux | before 6.12.94-1 | 6.12.94-1 |
| Debian:14 | linux | before 7.0.12-1 | 7.0.12-1 |
| openSUSE:Leap 16.0 | dtb-aarch64 | before 6.12.0-160000.40.1 | 6.12.0-160000.40.1 |
| openSUSE:Leap 16.0 | kernel-64kb | before 6.12.0-160000.40.1 | 6.12.0-160000.40.1 |
| openSUSE:Leap 16.0 | kernel-azure | before 6.12.0-160000.40.1 | 6.12.0-160000.40.1 |
| openSUSE:Leap 16.0 | kernel-default | before 6.12.0-160000.40.1 | 6.12.0-160000.40.1 |
| openSUSE:Leap 16.0 | kernel-default-base | before 6.12.0-160000.40.1.160000.2.29 | 6.12.0-160000.40.1.160000.2.29 |
| openSUSE:Leap 16.0 | kernel-docs | before 6.12.0-160000.40.1 | 6.12.0-160000.40.1 |
| openSUSE:Leap 16.0 | kernel-kvmsmall | before 6.12.0-160000.40.1 | 6.12.0-160000.40.1 |
| openSUSE:Leap 16.0 | kernel-obs-build | before 6.12.0-160000.40.1 | 6.12.0-160000.40.1 |
| openSUSE:Leap 16.0 | kernel-obs-qa | before 6.12.0-160000.40.1 | 6.12.0-160000.40.1 |
| openSUSE:Leap 16.0 | kernel-rt | before 6.12.0-160000.40.1 | 6.12.0-160000.40.1 |
| openSUSE:Leap 16.0 | kernel-source | before 6.12.0-160000.40.1 | 6.12.0-160000.40.1 |
| openSUSE:Leap 16.0 | kernel-syms | before 6.12.0-160000.40.1 | 6.12.0-160000.40.1 |
| openSUSE:Leap 16.0 | kernel-zfcpdump | before 6.12.0-160000.40.1 | 6.12.0-160000.40.1 |
| SUSE:Linux Enterprise Live Patching 15 SP7 | kernel-livepatch-SLE15-SP7_Update_23 | before 1-150700.15.3.2 | 1-150700.15.3.2 |
| SUSE:Linux Enterprise Live Patching 15 SP7 | kernel-livepatch-SLE15-SP7-RT_Update_22 | before 1-150700.1.3.1 | 1-150700.1.3.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP7 | kernel-64kb | before 6.4.0-150700.53.87.3 | 6.4.0-150700.53.87.3 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP7 | kernel-default | before 6.4.0-150700.53.87.3 | 6.4.0-150700.53.87.3 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP7 | kernel-default-base | before 6.4.0-150700.53.87.3.150700.17.49.2 | 6.4.0-150700.53.87.3.150700.17.49.2 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP7 | kernel-source | before 6.4.0-150700.53.87.3 | 6.4.0-150700.53.87.3 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP7 | kernel-zfcpdump | before 6.4.0-150700.53.87.3 | 6.4.0-150700.53.87.3 |
| SUSE:Linux Enterprise Module for Development Tools 15 SP7 | kernel-docs | before 6.4.0-150700.53.87.3 | 6.4.0-150700.53.87.3 |
+25
Same product
linux: all recordsOther highest-scoring records for the same primary product.
- CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV90Now
- CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV89Now
- CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV85Now
Published before and after this one in the same product
- ← EarlierCVE-2026-64108Jul 19, 2026 · cifs: Fix busy dentry used after unmounting31Monitor
- ← EarlierCVE-2026-64111Jul 19, 2026 · lsm: hold cred_guard_mutex for lsm_set_self_attr()28Monitor
- Later →CVE-2026-64119Jul 19, 2026 · l2tp: use list_del_rcu in l2tp_session_unhash22Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Linux Linux | 09cbfd4b81ae90963dadb1de99b63b702e73290a | Vendor (CNA) |
| Linux Linux | 1dca7e491f070ac49b3d934f16ee953a53b37f38 | Vendor (CNA) |
| Linux Linux | 902daac307eb7e1955ce05b071950f3cba88c963 | Vendor (CNA) |
| Linux Linux | abdd03229414b5a52943b65a60f34b84cea5ac59 | Vendor (CNA) |
| Linux Linux | c7e8971abd70e9d022f1c251ba2508f8dc7f2db8 | Vendor (CNA) |
| Linux Linux | cf75eb6617042c8cff6112daeed7791809fc9dd2 | Vendor (CNA) |
| Linux Linux | d4ea0dfd75011b78cebf3808f98ac4c4f51a6fb9 | Vendor (CNA) |
| debian:linux | 6.1.176-1 · Debian:12 | Package registry (OSV) |
| opensuse:dtb-aarch64 | 6.12.0-160000.40.1 · openSUSE:Leap 16.0 | Package registry (OSV) |
| opensuse:kernel-64kb | 6.12.0-160000.40.1 · openSUSE:Leap 16.0 | Package registry (OSV) |
| opensuse:kernel-azure | 6.12.0-160000.40.1 · openSUSE:Leap 16.0 | Package registry (OSV) |
| opensuse:kernel-default | 6.12.0-160000.40.1 · openSUSE:Leap 16.0 | Package registry (OSV) |
| opensuse:kernel-default-base | 6.12.0-160000.40.1.160000.2.29 · openSUSE:Leap 16.0 | Package registry (OSV) |
| opensuse:kernel-docs | 6.12.0-160000.40.1 · openSUSE:Leap 16.0 | Package registry (OSV) |
| opensuse:kernel-kvmsmall | 6.12.0-160000.40.1 · openSUSE:Leap 16.0 | Package registry (OSV) |
| opensuse:kernel-obs-build | 6.12.0-160000.40.1 · openSUSE:Leap 16.0 | Package registry (OSV) |
| opensuse:kernel-obs-qa | 6.12.0-160000.40.1 · openSUSE:Leap 16.0 | Package registry (OSV) |
| opensuse:kernel-rt | 6.12.0-160000.40.1 · openSUSE:Leap 16.0 | Package registry (OSV) |
| opensuse:kernel-source | 6.12.0-160000.40.1 · openSUSE:Leap 16.0 | Package registry (OSV) |
| opensuse:kernel-syms | 6.12.0-160000.40.1 · openSUSE:Leap 16.0 | Package registry (OSV) |
| suse:kernel-64kb | 6.12.0-160000.40.1 · SUSE:Linux Micro 6.2 | Package registry (OSV) |
| suse:kernel-azure | 6.12.0-160000.40.1 · SUSE:Linux Enterprise Server 16.0 | Package registry (OSV) |
| suse:kernel-azure | 6.4.0-150700.53.87.3 · SUSE:Linux Enterprise Module for Public Cloud 15 SP7 | Package registry (OSV) |
| suse:kernel-default | 6.4.0-159998.54.1 · SUSE:Linux Micro 6.0 | Package registry (OSV) |
| suse:kernel-default-base | 6.4.0-159998.54.1.159998.21.40 · SUSE:Linux Micro 6.0 | Package registry (OSV) |
| suse:kernel-docs | 6.12.0-160000.40.1 · SUSE:Linux Enterprise Server 16.0 | Package registry (OSV) |
| suse:kernel-docs | 6.4.0-150700.53.87.3 · SUSE:Linux Enterprise Module for Development Tools 15 SP7 | Package registry (OSV) |
| suse:kernel-kvmsmall | 6.4.0-159998.54.1 · SUSE:Linux Micro 6.0 | Package registry (OSV) |
| suse:kernel-livepatch-SLE15-SP7_Update_23 | 1-150700.15.3.2 · SUSE:Linux Enterprise Live Patching 15 SP7 | Package registry (OSV) |
| suse:kernel-obs-build | 6.12.0-160000.40.1 · SUSE:Linux Micro Extras 6.2 | Package registry (OSV) |
+6
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.
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 researchersFinders, 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
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-476 · NULL Pointer DereferenceCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (6 more)Show less
- git.kernel.org/stable/c/1dca7e491f070ac49b3d934f16ee953a53b37f38
- git.kernel.org/stable/c/902daac307eb7e1955ce05b071950f3cba88c963
- git.kernel.org/stable/c/abdd03229414b5a52943b65a60f34b84cea5ac59
- git.kernel.org/stable/c/c7e8971abd70e9d022f1c251ba2508f8dc7f2db8
- git.kernel.org/stable/c/cf75eb6617042c8cff6112daeed7791809fc9dd2
- git.kernel.org/stable/c/d4ea0dfd75011b78cebf3808f98ac4c4f51a6fb9
Vendor advisories and official records. Exploit/PoC links are deliberately left out.