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NVD / CVE Program· CNA Linux

CVE-2023-53839: dccp: fix data-race around dp->dccps_mss_cache

Noroxi assessment

Priority: Monitor (action score 0/100)

  • 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: 0.25% (FIRST EPSS).
  • Fixed version: Linux Linux 162fa1e3cfb62aa780d7c40c8cccb6c2f8bef7c1, 2bdc7f272b3a110a4e1fdee6c47c8d20f9b20817, 67eebc7a9217f999b779d46fba5312a716f0dc1d.

Low priority for now. Upgrade to Linux Linux 162fa1e3cfb62aa780d7c40c8cccb6c2f8bef7c1, 2bdc7f272b3a110a4e1fdee6c47c8d20f9b20817, 67eebc7a9217f999b779d46fba5312a716f0dc1d 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: 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.

—No exploit Fix available
Published
Dec 9, 2025
Updated
Jun 17, 2026
EPSS
0.2% · 17th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

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  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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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.

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Affected 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.

—

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

    • 2.6.14affected
    • 7c657876b63cb1d8a2ec06f8fc6c37bb8412e66c and later · before 162fa1e3cfb62aa780d7c40c8cccb6c2f8bef7c1affected · git
    • 7c657876b63cb1d8a2ec06f8fc6c37bb8412e66c and later · before 2bdc7f272b3a110a4e1fdee6c47c8d20f9b20817affected · git
    • 7c657876b63cb1d8a2ec06f8fc6c37bb8412e66c and later · before 67eebc7a9217f999b779d46fba5312a716f0dc1daffected · git
    • 7c657876b63cb1d8a2ec06f8fc6c37bb8412e66c and later · before 6d701c95ee6463abcbb6da543060d6e444554135affected · git
    • 7c657876b63cb1d8a2ec06f8fc6c37bb8412e66c and later · before f239c9e1d98b313435481b4926e8bdd06197e4d8affected · git
    • 7c657876b63cb1d8a2ec06f8fc6c37bb8412e66c and later · before a6ddc1c774874dc704f96a99d015dc759627bba7affected · git
    • 7c657876b63cb1d8a2ec06f8fc6c37bb8412e66c and later · before d1f38d313bdfc52fb2f662e66d0c60dd1cfe2384affected · git
    • 7c657876b63cb1d8a2ec06f8fc6c37bb8412e66c and later · before a47e598fbd8617967e49d85c49c22f9fc642704caffected · git
    • before 2.6.14not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.52-16.1.52-1
Debian:13linuxbefore 6.4.11-16.4.11-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2023-53837Dec 9, 2025 · drm/msm: fix NULL-deref on snapshot tear down
    0Monitor
  • ← EarlierCVE-2023-53838Dec 9, 2025 · f2fs: synchronize atomic write aborts
    31Monitor
  • Later →CVE-2023-53840Dec 9, 2025 · usb: early: xhci-dbc: Fix a potential out-of-bound memory access
    0Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux162fa1e3cfb62aa780d7c40c8cccb6c2f8bef7c1Vendor (CNA)
Linux Linux2bdc7f272b3a110a4e1fdee6c47c8d20f9b20817Vendor (CNA)
Linux Linux67eebc7a9217f999b779d46fba5312a716f0dc1dVendor (CNA)
Linux Linux6d701c95ee6463abcbb6da543060d6e444554135Vendor (CNA)
Linux Linuxa47e598fbd8617967e49d85c49c22f9fc642704cVendor (CNA)
Linux Linuxa6ddc1c774874dc704f96a99d015dc759627bba7Vendor (CNA)
Linux Linuxd1f38d313bdfc52fb2f662e66d0c60dd1cfe2384Vendor (CNA)
Linux Linuxf239c9e1d98b313435481b4926e8bdd06197e4d8Vendor (CNA)
debian:linux6.1.52-1 · Debian:12Package 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.

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 researchers

Finders, 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).

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records