ipvs: fix reversed sequence option serialization
Priority LOW 19CWE-125Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Low · None · Low
- Fix status
- Partial Red Hat: 7 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.
Summary
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.
Why it matters now
EPSS 0.00155 4th percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.10.271, 5.15.222, 6.1.189 +5Red Hat: 7 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 2.6.39 and later | 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.111, 6.18.53, 7.2.7, 7.3 | Patch available | CNA |
- Linux VendorLinux Affected 2.6.39 and later Fixed in 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.111, 6.18.53, 7.2.7, 7.3 Patch available CNA
CPE configurations NVD · 3
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 2.6.39 to before 6.12.111; 6.13 to before 6.18.53; 6.19 to before 7.2.7 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:7.3:rc1:*:*:*:*:*:* | 7.3 rc1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:7.3:rc2:*:*:*:*:*:* | 7.3 rc2 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 2.6.39 to before 6.12.111; 6.13 to before 6.18.53; 6.19 to before 7.2.7 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:7.3:rc1:*:*:*:*:*:* Versions 7.3 rc1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:7.3:rc2:*:*:*:*:*:* Versions 7.3 rc2 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.111, 6.18.53, 7.2.7, 7.3
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix yet |
| Red Hat Enterprise Linux 8 | Affected | No fix yet |
| Red Hat Enterprise Linux 9 | Affected | No fix yet |
| Red Hat OpenShift Container Platform 4 | Affected | No fix yet |
| Red Hat OpenShift Container Platform 5 | Affected | No fix yet |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-98078
- 2026-10-03 Alias added: GHSA-22jc-j6q2-9wv9
- 2026-10-03 Fix available: Linux/[email protected], Linux/[email protected], Linux/[email protected] +5 · CNA
- 2026-10-03 4 new references · CNA
- 2026-10-09 CVSS score added · NVD
- 2026-10-09 Weakness changed · NVD
- 2026-10-19 Fix available: Linux/[email protected] · CNA
- 2026-11-06 Affected versions changed · Red Hat
- 2026-11-06 CVSS score added · Red Hat
References
Patch 8
- https://git.kernel.org/stable/c/ae38b2ae16f709c0193e1b4340bde26ef3e2687d
- https://git.kernel.org/stable/c/bbc68ba258a4eb0a2ca3b3a105550801aa8b00b0
- https://git.kernel.org/stable/c/f487b5788f15c6c32a219ed1480d25c93fc18d30
- https://git.kernel.org/stable/c/677ff8ab30a663cde984d8afe86465fd0d81aeef
- https://git.kernel.org/stable/c/e1c9f9446d3eaae323f1689f9e5de3b1ad6e47ec
- https://git.kernel.org/stable/c/524599714558da83747c04952d378155c69f5b6b
- https://git.kernel.org/stable/c/de6cc6ec7932bc530f2bb92005dac9123d50659c
- https://git.kernel.org/stable/c/b04578b74f2d3755548fe9e829e3b2a6c6f966a1
More Linux Kernel vulnerabilities
- TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
- TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
- TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
- TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2026-98078 · CVE Program
- CVE-2026-98078 · NVD
- FIRST EPSS
- GHSA-22jc-j6q2-9wv9 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-98078 · Red Hat security data · CC BY 4.0
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