CVE-2026-46244: netfilter: nft_inner: Fix IPv6 inner_thoff desync
Noroxi assessment
Priority: Monitor (action score 36/100)
- 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: 0.41% (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.
- According to CISA the attack is automatable: targets can be found by mass scanning.
- Fixed version: Linux Linux 689bbf48c1f45130086ae1c46ab83ea4c753c601, 870d59e2cf218e7418491e26bad768cb16654582, b6a91f68ebfed9c38e0e9150f58a9b85da07181c; azl3 kernel 6.6.141.1-1 on Azure Linux 3.0 6.6.143.1-1.
Low priority for now. Upgrade to Linux Linux 689bbf48c1f45130086ae1c46ab83ea4c753c601, 870d59e2cf218e7418491e26bad768cb16654582, b6a91f68ebfed9c38e0e9150f58a9b85da07181c; azl3 kernel 6.6.141.1-1 on Azure Linux 3.0 6.6.143.1-1 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: netfilter: nft_inner: Fix IPv6 inner_thoff desync In nft_inner_parse_l2l3(), when processing inner IPv6 packets, ipv6_find_hdr() correctly computes the transport header offset traversing all extension headers, but the result is immediately overwritten with nhoff + sizeof(_ip6h) (40 bytes), which only accounts for the IPv6 base header. This creates a desync between inner_thoff (wrong — points to extension header start) and l4proto (correct — e.g., IPPROTO_TCP), enabling transport header forgery and potential firewall bypass. This issue affects stable versions from Linux 6.2. For comparison, the normal (non-inner) IPv6 path correctly preserves ipv6_find_hdr()'s result. Removing the incorrect overwrite ensures that ipv6_find_hdr()'s calculated transport header offset is preserved, thereby fixing the desynchronization.
- Published
- Jun 3, 2026
- Updated
- Oct 19, 2026
- EPSS
- 0.4% · 36th percentile
- CWE
- CWE-682
Report tools
Action score
36
Monitor
Low priority for now.
- CVSS
- 36 / 40 · 9.1 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.4%
CISA SSVC decision
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- —
- CNA · Linux
- 9.1
- 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 kernel6.2 and later · before 6.6.142
- 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
- 6.2affected
- 3a07327d10a09379315c844c63f27941f5081e0a and later · before c161ad9157f5a0429b5ff94d9770faf3bf48d273affected · git
- 3a07327d10a09379315c844c63f27941f5081e0a and later · before 870d59e2cf218e7418491e26bad768cb16654582affected · git
- 3a07327d10a09379315c844c63f27941f5081e0a and later · before 689bbf48c1f45130086ae1c46ab83ea4c753c601affected · git
- 3a07327d10a09379315c844c63f27941f5081e0a and later · before d0f98a3617f6ae5b1e95cde1e68e7ead4a1279ceaffected · git
- 3a07327d10a09379315c844c63f27941f5081e0a and later · before b6a91f68ebfed9c38e0e9150f58a9b85da07181caffected · git
- before 6.2not affected · semver
- 6.6.142 and later · up to and including 6.6.*not affected · semver
- 6.12.92 and later · up to and including 6.12.*not affected · semver
- 6.18.34 and later · up to and including 6.18.*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 |
|---|---|---|---|
| AlmaLinux:10 | kernel | before 6.12.0-211.30.1.el10_2 | 6.12.0-211.30.1.el10_2 |
| AlmaLinux:10 | kernel-64k | before 6.12.0-211.30.1.el10_2 | 6.12.0-211.30.1.el10_2 |
| AlmaLinux:10 | kernel-64k-core | before 6.12.0-211.30.1.el10_2 | 6.12.0-211.30.1.el10_2 |
| AlmaLinux:10 | kernel-64k-debug | before 6.12.0-211.30.1.el10_2 | 6.12.0-211.30.1.el10_2 |
| AlmaLinux:10 | kernel-64k-debug-core | before 6.12.0-211.30.1.el10_2 | 6.12.0-211.30.1.el10_2 |
| AlmaLinux:10 | kernel-64k-debug-devel | before 6.12.0-211.30.1.el10_2 | 6.12.0-211.30.1.el10_2 |
| AlmaLinux:10 | kernel-64k-debug-devel-matched | before 6.12.0-211.30.1.el10_2 | 6.12.0-211.30.1.el10_2 |
| AlmaLinux:10 | kernel-64k-debug-modules | before 6.12.0-211.30.1.el10_2 | 6.12.0-211.30.1.el10_2 |
| AlmaLinux:10 | kernel-64k-debug-modules-core | before 6.12.0-211.30.1.el10_2 | 6.12.0-211.30.1.el10_2 |
| AlmaLinux:10 | kernel-64k-debug-modules-extra | before 6.12.0-211.30.1.el10_2 | 6.12.0-211.30.1.el10_2 |
| AlmaLinux:10 | kernel-64k-devel | before 6.12.0-211.30.1.el10_2 | 6.12.0-211.30.1.el10_2 |
| AlmaLinux:10 | kernel-64k-devel-matched | before 6.12.0-211.30.1.el10_2 | 6.12.0-211.30.1.el10_2 |
| AlmaLinux:10 | kernel-64k-modules | before 6.12.0-211.30.1.el10_2 | 6.12.0-211.30.1.el10_2 |
| AlmaLinux:10 | kernel-64k-modules-core | before 6.12.0-211.30.1.el10_2 | 6.12.0-211.30.1.el10_2 |
| AlmaLinux:10 | kernel-64k-modules-extra | before 6.12.0-211.30.1.el10_2 | 6.12.0-211.30.1.el10_2 |
| AlmaLinux:10 | kernel-abi-stablelists | before 6.12.0-211.30.1.el10_2 | 6.12.0-211.30.1.el10_2 |
| AlmaLinux:10 | kernel-core | before 6.12.0-211.30.1.el10_2 | 6.12.0-211.30.1.el10_2 |
| AlmaLinux:10 | kernel-cross-headers | before 6.12.0-211.30.1.el10_2 | 6.12.0-211.30.1.el10_2 |
| AlmaLinux:10 | kernel-debug | before 6.12.0-211.30.1.el10_2 | 6.12.0-211.30.1.el10_2 |
| AlmaLinux:10 | kernel-debug-core | before 6.12.0-211.30.1.el10_2 | 6.12.0-211.30.1.el10_2 |
| AlmaLinux:10 | kernel-debug-devel | before 6.12.0-211.30.1.el10_2 | 6.12.0-211.30.1.el10_2 |
| AlmaLinux:10 | kernel-debug-devel-matched | before 6.12.0-211.30.1.el10_2 | 6.12.0-211.30.1.el10_2 |
| AlmaLinux:10 | kernel-debug-modules | before 6.12.0-211.30.1.el10_2 | 6.12.0-211.30.1.el10_2 |
| AlmaLinux:10 | kernel-debug-modules-core | before 6.12.0-211.30.1.el10_2 | 6.12.0-211.30.1.el10_2 |
+96
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-2026-46273Jun 3, 2026 · ibmveth: Disable GSO for packets with small MSS34Monitor
- ← EarlierCVE-2025-71313Jun 3, 2026 · PCI: endpoint: Add missing NULL check for alloc_workqueue()22Monitor
- Later →CVE-2026-46245Jun 3, 2026 · drm/amd/display: Fix dc_link NULL handling in HPD init22Monitor
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 | 689bbf48c1f45130086ae1c46ab83ea4c753c601 | Vendor (CNA) |
| Linux Linux | 870d59e2cf218e7418491e26bad768cb16654582 | Vendor (CNA) |
| Linux Linux | b6a91f68ebfed9c38e0e9150f58a9b85da07181c | Vendor (CNA) |
| Linux Linux | c161ad9157f5a0429b5ff94d9770faf3bf48d273 | Vendor (CNA) |
| Linux Linux | d0f98a3617f6ae5b1e95cde1e68e7ead4a1279ce | Vendor (CNA) |
| azl3 kernel 6.6.141.1-1 on Azure Linux 3.0 | 6.6.143.1-1 · CBL-Mariner Releases | Microsoft (MSRC) |
| almalinux:kernel | 6.12.0-211.30.1.el10_2 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:kernel-64k | 6.12.0-211.30.1.el10_2 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:kernel-64k-core | 6.12.0-211.30.1.el10_2 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:kernel-64k-debug | 6.12.0-211.30.1.el10_2 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:kernel-64k-debug-core | 6.12.0-211.30.1.el10_2 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:kernel-64k-debug-devel | 6.12.0-211.30.1.el10_2 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:kernel-64k-debug-devel-matched | 6.12.0-211.30.1.el10_2 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:kernel-64k-debug-modules | 6.12.0-211.30.1.el10_2 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:kernel-64k-debug-modules-core | 6.12.0-211.30.1.el10_2 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:kernel-64k-debug-modules-extra | 6.12.0-211.30.1.el10_2 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:kernel-64k-devel | 6.12.0-211.30.1.el10_2 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:kernel-64k-devel-matched | 6.12.0-211.30.1.el10_2 · AlmaLinux:10 | Package registry (OSV) |
| debian:linux | 6.12.94-1 · Debian:13 | Package registry (OSV) |
| opensuse:kernel-source | 7.0.12-1.1 · openSUSE:Tumbleweed | Package registry (OSV) |
| red hat:kernel-64k-debug-debuginfo | 0:6.12.0-55.84.1.el10_0 · Red Hat:enterprise_linux_eus:10.0 | Package registry (OSV) |
| red hat:kernel-64k-debug-devel | 0:6.12.0-55.84.1.el10_0 · Red Hat:enterprise_linux_eus:10.0 | Package registry (OSV) |
| red hat:kernel-64k-debug-devel-matched | 0:6.12.0-55.84.1.el10_0 · Red Hat:enterprise_linux_eus:10.0 | Package registry (OSV) |
| red hat:kernel-64k-debuginfo | 0:6.12.0-55.84.1.el10_0 · Red Hat:enterprise_linux_eus:10.0 | Package registry (OSV) |
| red hat:kernel-64k-devel | 0:6.12.0-55.84.1.el10_0 · Red Hat:enterprise_linux_eus:10.0 | Package registry (OSV) |
| red hat:kernel-64k-devel-matched | 0:6.12.0-55.84.1.el10_0 · Red Hat:enterprise_linux_eus:10.0 | Package registry (OSV) |
| red hat:kernel-debug-debuginfo | 0:6.12.0-55.84.1.el10_0 · Red Hat:enterprise_linux_eus:10.0 | Package registry (OSV) |
| red hat:kernel-debug-devel | 0:6.12.0-55.84.1.el10_0 · Red Hat:enterprise_linux_eus:10.0 | Package registry (OSV) |
| red hat:kernel-debug-devel-matched | 0:6.12.0-55.84.1.el10_0 · Red Hat:enterprise_linux_eus:10.0 | Package registry (OSV) |
| red hat:kernel-debuginfo | 0:6.12.0-55.84.1.el10_0 · Red Hat:enterprise_linux_eus:10.0 | Package registry (OSV) |
+3
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.
No history yet (it accumulates with the daily EPSS job).
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.
- CVE-2026-459887 days apartrxrpc: Fix re-decryption of RESPONSE packets39Monitor
- CVE-2026-5321722 days apartnet: mvpp2: sync RX data at the hardware packet offset34Monitor
- CVE-2026-5292021 days apartnetfilter: xt_policy: fix strict mode inbound policy matching33Monitor
- CVE-2026-6417646 days apartwifi: iwlwifi: mvm: fix driver-set TX rates on old devices32Monitor
- CVE-2026-459337 days apartbpf: Preserve id of register in sync_linked_regs()31Monitor
- CVE-2026-5319122 days apartio_uring/net: inherit IORING_CQE_F_BUF_MORE across bundle recv retries31Monitor
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
- none
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- None
Weakness class (CWE)
CWE-682 · Incorrect CalculationCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
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.
Attack patterns (CAPEC)
ATT&CK techniques
—
Change log
- SSVC exploitation— → none
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (15 more)Show less
- git.kernel.org/stable/c/870d59e2cf218e7418491e26bad768cb16654582
- git.kernel.org/stable/c/b6a91f68ebfed9c38e0e9150f58a9b85da07181c
- git.kernel.org/stable/c/c161ad9157f5a0429b5ff94d9770faf3bf48d273
- git.kernel.org/stable/c/d0f98a3617f6ae5b1e95cde1e68e7ead4a1279ce
- access.redhat.com/errata/RHSA-2026:33215
- access.redhat.com/errata/RHSA-2026:34094
- access.redhat.com/errata/RHSA-2026:34443
- access.redhat.com/errata/RHSA-2026:34911
- access.redhat.com/errata/RHSA-2026:36018
- access.redhat.com/errata/RHSA-2026:55618
- access.redhat.com/errata/RHSA-2026:55763
- access.redhat.com/errata/RHSA-2026:56225
- access.redhat.com/security/cve/CVE-2026-46244
- bugzilla.redhat.com/show_bug.cgi?id=2484451
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46244.json
Vendor advisories and official records. Exploit/PoC links are deliberately left out.