dccp: fix data-race around dp->dccps_mss_cache
Priority LOW 22Published · Updated
Key facts
- Attack vector
- —
- Privileges required
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- User interaction
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- Attack complexity
- —
- Impact type
- —
- Confidentiality · integrity · availability
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- Fix status
- Partial Red Hat: 2 without a fix
No CVSS vector from any source. Fix status from CNA and Red Hat.
Summary
In the Linux kernel, the following vulnerability has been resolved: dccp: fix data-race around dp->dccps_mss_cache dccp_sendmsg() reads dp->dccps_mss_cache before locking the socket. Same thing in do_dccp_getsockopt(). Add READ_ONCE()/WRITE_ONCE() annotations, and change dccp_sendmsg() to check again dccps_mss_cache after socket is locked.
Why it matters now
EPSS 0.00257 17th percentileScored 2026-11-07
Fix Partial Linux (Linux): 4.14.323, 4.19.292, 5.4.254 +5Red Hat: 2 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 | 2.6.14 and later | 4.14.323, 4.19.292, 5.4.254, 5.10.191, 5.15.127, 6.1.46, 6.4.11, 6.5 | Patch available | CNA |
- Linux VendorLinux Affected 2.6.14 and later Fixed in 4.14.323, 4.19.292, 5.4.254, 5.10.191, 5.15.127, 6.1.46, 6.4.11, 6.5 Patch available CNA
Remediation
- Fix · CNA Linux (Linux) Fixed in 4.14.323, 4.19.292, 5.4.254, 5.10.191, 5.15.127, 6.1.46, 6.4.11, 6.5
Vendor assessments
Red Hat
Red Hat rating: Moderate. 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 yet |
Not affected: 3 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2023-53839
- 2026-10-03 Alias added: GHSA-8252-q96p-5jpg
References
Other 8
- https://git.kernel.org/stable/c/162fa1e3cfb62aa780d7c40c8cccb6c2f8bef7c1
- https://git.kernel.org/stable/c/2bdc7f272b3a110a4e1fdee6c47c8d20f9b20817
- https://git.kernel.org/stable/c/67eebc7a9217f999b779d46fba5312a716f0dc1d
- https://git.kernel.org/stable/c/6d701c95ee6463abcbb6da543060d6e444554135
- https://git.kernel.org/stable/c/f239c9e1d98b313435481b4926e8bdd06197e4d8
- https://git.kernel.org/stable/c/a6ddc1c774874dc704f96a99d015dc759627bba7
- https://git.kernel.org/stable/c/d1f38d313bdfc52fb2f662e66d0c60dd1cfe2384
- https://git.kernel.org/stable/c/a47e598fbd8617967e49d85c49c22f9fc642704c
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Sources
- CVE-2023-53839 · CVE Program
- CVE-2023-53839 · NVD
- FIRST EPSS
- GHSA-8252-q96p-5jpg · GitHub Advisory Database · CC BY 4.0
- CVE-2023-53839 · Red Hat security data · CC BY 4.0
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