tcp: Fix data-races around sysctl_tcp_max_reordering.
Priority LOW 21CWE-362Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 4 without a fix
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat.
Summary
In the Linux kernel, the following vulnerability has been resolved: tcp: Fix data-races around sysctl_tcp_max_reordering. While reading sysctl_tcp_max_reordering, it can be changed concurrently. Thus, we need to add READ_ONCE() to its readers.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00186 8th percentileScored 2026-11-07
Fix Partial Linux (Linux): 4.19.254, 5.4.208, 5.10.134 +3Red Hat: 4 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 3.19 and later | 4.19.254, 5.4.208, 5.10.134, 5.15.58, 5.18.15, 5.19 | Patch available | CNA |
- Linux VendorLinux Affected 3.19 and later Fixed in 4.19.254, 5.4.208, 5.10.134, 5.15.58, 5.18.15, 5.19 Patch available CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 3.19 to before 4.19.254; 4.20 to before 5.4.208; 5.5 to before 5.10.134; 5.11 to before 5.15.58; 5.16 to before 5.18.15 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.19:rc1:*:*:*:*:*:* | 5.19 rc1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.19:rc2:*:*:*:*:*:* | 5.19 rc2 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.19:rc3:*:*:*:*:*:* | 5.19 rc3 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.19:rc4:*:*:*:*:*:* | 5.19 rc4 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.19:rc5:*:*:*:*:*:* | 5.19 rc5 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.19:rc6:*:*:*:*:*:* | 5.19 rc6 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.19:rc7:*:*:*:*:*:* | 5.19 rc7 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 3.19 to before 4.19.254; 4.20 to before 5.4.208; 5.5 to before 5.10.134; 5.11 to before 5.15.58; 5.16 to before 5.18.15 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.19:rc1:*:*:*:*:*:* Versions 5.19 rc1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.19:rc2:*:*:*:*:*:* Versions 5.19 rc2 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.19:rc3:*:*:*:*:*:* Versions 5.19 rc3 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.19:rc4:*:*:*:*:*:* Versions 5.19 rc4 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.19:rc5:*:*:*:*:*:* Versions 5.19 rc5 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.19:rc6:*:*:*:*:*:* Versions 5.19 rc6 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.19:rc7:*:*:*:*:*:* Versions 5.19 rc7 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 4.19.254, 5.4.208, 5.10.134, 5.15.58, 5.18.15, 5.19
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 8 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 9 | Affected | No fix yet |
Not affected: 1 product
- Red Hat Enterprise Linux 10
Timeline
- 2026-10-02 Threatist record created from CVE-2022-49571
- 2026-10-03 Alias added: GHSA-jw75-r63h-46q8
References
Patch 6
- https://git.kernel.org/stable/c/5e38cee24f19d19280c68f1ac8bf6790d607f60a
- https://git.kernel.org/stable/c/50a1d3d097503a90cf84ebe120afcde37e9c33b3
- https://git.kernel.org/stable/c/064852663308c801861bd54789d81421fa4c2928
- https://git.kernel.org/stable/c/ce3731c61589ed73364a5b55ce34131762ef9b60
- https://git.kernel.org/stable/c/46deb91ac8a790286ad6d24cf92e7ab0ab2582bb
- https://git.kernel.org/stable/c/a11e5b3e7a59fde1a90b0eaeaa82320495cf8cae
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-2022-49571 · CVE Program
- CVE-2022-49571 · NVD
- FIRST EPSS
- GHSA-jw75-r63h-46q8 · GitHub Advisory Database · CC BY 4.0
- CVE-2022-49571 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences