CVE-2026-98078: ipvs: fix reversed sequence option serialization
Noroxi assessment
Priority: Monitor (action score 17/100)
- 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: 0.15% (FIRST EPSS).
- Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
- Fixed version: Linux Linux 524599714558da83747c04952d378155c69f5b6b, 677ff8ab30a663cde984d8afe86465fd0d81aeef, ae38b2ae16f709c0193e1b4340bde26ef3e2687d; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes; azl3 kernel 6.6.159.1-1 on Azure Linux 3.0 Release Notes.
- Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).
Low priority for now. Upgrade to Linux Linux 524599714558da83747c04952d378155c69f5b6b, 677ff8ab30a663cde984d8afe86465fd0d81aeef, ae38b2ae16f709c0193e1b4340bde26ef3e2687d; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes; azl3 kernel 6.6.159.1-1 on Azure Linux 3.0 Release Notes 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: fix reversed sequence option serialization hton_seq() expects the host-order source first and the unaligned network-order destination second. The version 1 sync sender passes these arguments in reverse for both sequence blocks. This leaves 24 bytes of the kmalloc-backed message unwritten. It may disclose stale heap data and replace the live connection sequence state with values read from the buffer. Pass the connection sequence state as the source and the message payload as the destination for both blocks.
- Published
- Sep 25, 2026
- Updated
- Oct 19, 2026
- EPSS
- 0.1% · 4th percentile
- CWE
- CWE-125
Report tools
Action score
17
Monitor
Low priority for now.
- CVSS
- 17 / 40 · 4.4 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.1%
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 kernel2.6.39 and later · before 6.12.111
- linux linux kernel6.13 and later · before 6.18.53
- linux linux kernel6.19 and later · before 7.2.7
- linux linux kernel7.3
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
- 2.6.39affected
- 986a075795339c5ea1122ce9290dfd5504252eb0 and later · before ae38b2ae16f709c0193e1b4340bde26ef3e2687daffected · git
- 986a075795339c5ea1122ce9290dfd5504252eb0 and later · before bbc68ba258a4eb0a2ca3b3a105550801aa8b00b0affected · git
- 986a075795339c5ea1122ce9290dfd5504252eb0 and later · before f487b5788f15c6c32a219ed1480d25c93fc18d30affected · git
- 986a075795339c5ea1122ce9290dfd5504252eb0 and later · before 677ff8ab30a663cde984d8afe86465fd0d81aeefaffected · git
- 986a075795339c5ea1122ce9290dfd5504252eb0 and later · before e1c9f9446d3eaae323f1689f9e5de3b1ad6e47ecaffected · git
- 986a075795339c5ea1122ce9290dfd5504252eb0 and later · before 524599714558da83747c04952d378155c69f5b6baffected · git
- 986a075795339c5ea1122ce9290dfd5504252eb0 and later · before de6cc6ec7932bc530f2bb92005dac9123d50659caffected · git
- 986a075795339c5ea1122ce9290dfd5504252eb0 and later · before b04578b74f2d3755548fe9e829e3b2a6c6f966a1affected · git
- before 2.6.39not 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 6.1.190-1 | 6.1.190-1 |
| Debian:12 | linux-6.12 | before 6.12.111-1~deb12u1 | 6.12.111-1~deb12u1 |
| Debian:13 | linux | before 6.12.111-1 | 6.12.111-1 |
| Debian:14 | linux | before 7.2.7-1 | 7.2.7-1 |
| openSUSE:Tumbleweed | kernel-source | before 7.2.10-1.1 | 7.2.10-1.1 |
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-2026-98059Sep 25, 2026 · bpf: Mark sched_process_wait argument as nullable22Monitor
- ← EarlierCVE-2026-98062Sep 25, 2026 · bpf: Mark signal tracepoint siginfo arguments as scalar22Monitor
- Later →CVE-2026-98080Sep 25, 2026 · btrfs: do not force reloc root creation during qgroup_account_snapshot()22Monitor
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 | 524599714558da83747c04952d378155c69f5b6b | Vendor (CNA) |
| Linux Linux | 677ff8ab30a663cde984d8afe86465fd0d81aeef | Vendor (CNA) |
| Linux Linux | ae38b2ae16f709c0193e1b4340bde26ef3e2687d | Vendor (CNA) |
| Linux Linux | b04578b74f2d3755548fe9e829e3b2a6c6f966a1 | Vendor (CNA) |
| Linux Linux | bbc68ba258a4eb0a2ca3b3a105550801aa8b00b0 | Vendor (CNA) |
| Linux Linux | de6cc6ec7932bc530f2bb92005dac9123d50659c | Vendor (CNA) |
| Linux Linux | e1c9f9446d3eaae323f1689f9e5de3b1ad6e47ec | Vendor (CNA) |
| Linux Linux | f487b5788f15c6c32a219ed1480d25c93fc18d30 | Vendor (CNA) |
| azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 | Release Notes | Microsoft (MSRC) |
| azl3 kernel 6.6.159.1-1 on Azure Linux 3.0 | Release Notes | Microsoft (MSRC) |
| azl3 kernel 6.6.161.1-1 on Azure Linux 3.0 | Release Notes | Microsoft (MSRC) |
| debian:linux | 6.1.190-1 · Debian:12 | Package registry (OSV) |
| debian:linux | 6.12.111-1 · Debian:13 | Package registry (OSV) |
| debian:linux-6.12 | 6.12.111-1~deb12u1 · Debian:12 | Package registry (OSV) |
| opensuse:kernel-source | 7.2.10-1.1 · openSUSE:Tumbleweed | Package 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.
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).
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-26-1184 · Sep 28, 2026(Linux Kernel Güvenlik Bildirimi)
Technical details
Attack conditions
- Someone with local access to the system can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- low · data can be read
- Integrity
- none
- Availability
- low · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- Low
- Integrity impact
- None
- Availability impact
- Low
Weakness class (CWE)
CWE-125 · Out-of-bounds ReadCVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L
nvd-primary
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
- CVSS— → 4.4
- Severity— → medium
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (7 more)Show less
- git.kernel.org/stable/c/677ff8ab30a663cde984d8afe86465fd0d81aeef
- git.kernel.org/stable/c/ae38b2ae16f709c0193e1b4340bde26ef3e2687d
- git.kernel.org/stable/c/b04578b74f2d3755548fe9e829e3b2a6c6f966a1
- git.kernel.org/stable/c/bbc68ba258a4eb0a2ca3b3a105550801aa8b00b0
- git.kernel.org/stable/c/de6cc6ec7932bc530f2bb92005dac9123d50659c
- git.kernel.org/stable/c/e1c9f9446d3eaae323f1689f9e5de3b1ad6e47ec
- git.kernel.org/stable/c/f487b5788f15c6c32a219ed1480d25c93fc18d30
Vendor advisories and official records. Exploit/PoC links are deliberately left out.