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TI-2023-06101 Aliases CVE-2023-6660GHSA-cvh9-m5vp-qhrv

NFS client data corruption and kernel memory disclosure

Priority LOW 30Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

When a program running on an affected system appends data to a file via an NFS client mount, the bug can cause the NFS client to fail to copy in the data to be written but proceed as though the copy operation had succeeded. This means that the data to be written is instead replaced with whatever data had been in the packet buffer previously. Thus, an unprivileged user with access to an affected system may abuse the bug to trigger disclosure of sensitive information. In particular, the leak is limited to data previously stored in mbufs, which are used for network transmission and reception, and for certain types of inter-process communication. The bug can also be triggered unintentionally by system applications, in which case the data written by the application to an NFS mount may be corrupted. Corrupted data is written over the network to the NFS server, and thus also susceptible to being snooped by other hosts on the network. Note that the bug exists only in the NFS client; the version and implementation of the server has no effect on whether a given system is affected by the problem.

Why it matters now

EPSS 0.00622 50th percentileScored 2026-11-07
Fix Fixed FreeBSD (FreeBSD): p3, p8

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
FreeBSDFreeBSD14.0-RELEASE to before p3; 13.2-RELEASE to before p8p3, p8Patch availableCNA
  • FreeBSD VendorFreeBSD Affected 14.0-RELEASE to before p3; 13.2-RELEASE to before p8 Fixed in p3, p8 Patch available CNA

CPE configurations NVD · 14

CPEVersionsRoleVendor
cpe:2.3:o:freebsd:freebsd:13.2:-:*:*:*:*:*:*13.2VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:13.2:p1:*:*:*:*:*:*13.2 p1VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:13.2:p2:*:*:*:*:*:*13.2 p2VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:13.2:p3:*:*:*:*:*:*13.2 p3VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:13.2:p4:*:*:*:*:*:*13.2 p4VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:13.2:p5:*:*:*:*:*:*13.2 p5VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:13.2:p6:*:*:*:*:*:*13.2 p6VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:13.2:p7:*:*:*:*:*:*13.2 p7VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:14.0:-:*:*:*:*:*:*14.0VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:14.0:beta5:*:*:*:*:*:*14.0 beta5VulnerableFreeBSD
  • cpe:2.3:o:freebsd:freebsd:13.2:-:*:*:*:*:*:* Versions 13.2 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:13.2:p1:*:*:*:*:*:* Versions 13.2 p1 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:13.2:p2:*:*:*:*:*:* Versions 13.2 p2 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:13.2:p3:*:*:*:*:*:* Versions 13.2 p3 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:13.2:p4:*:*:*:*:*:* Versions 13.2 p4 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:13.2:p5:*:*:*:*:*:* Versions 13.2 p5 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:13.2:p6:*:*:*:*:*:* Versions 13.2 p6 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:13.2:p7:*:*:*:*:*:* Versions 13.2 p7 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.0:-:*:*:*:*:*:* Versions 14.0 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.0:beta5:*:*:*:*:*:* Versions 14.0 beta5 Vulnerable ·FreeBSD
Show 4 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:freebsd:freebsd:14.0:p1:*:*:*:*:*:*14.0 p1VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:14.0:p2:*:*:*:*:*:*14.0 p2VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:14.0:rc3:*:*:*:*:*:*14.0 rc3VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:14.0:rc4-p1:*:*:*:*:*:*14.0 rc4-p1VulnerableFreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.0:p1:*:*:*:*:*:* Versions 14.0 p1 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.0:p2:*:*:*:*:*:* Versions 14.0 p2 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.0:rc3:*:*:*:*:*:* Versions 14.0 rc3 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.0:rc4-p1:*:*:*:*:*:* Versions 14.0 rc4-p1 Vulnerable ·FreeBSD

Remediation

  • Fix · CNA FreeBSD (FreeBSD) Fixed in p3, p8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-6660
  2. 2026-10-03 Alias added: GHSA-cvh9-m5vp-qhrv
  3. 2026-11-06 EPSS moved to the 50th–90th percentile

References

Advisory 1

Other 1

  • TI-2011-04182 Buffer overflow in libtelnet/encrypt.c in telnetd in FreeBSD 7.3 through 9.0, MIT… CVSS 2.0HIGH 10.0
  • TI-2007-03684 Integer overflow in print-bgp.c in the BGP dissector in tcpdump 3.9.6 and earlier allows… CVSS 3.1CRITICAL 9.8
  • TI-2002-00376 Integer overflow in xdr_array function in RPC servers for operating systems that use… CVSS 3.1CRITICAL 9.8
  • TI-2024-05929 Openssh: regresshion - race condition in ssh allows rce/dos CVSS 3.1HIGH 8.1
  • TI-2003-00437 Off-by-one error in the fb_realpath() function, as derived from the realpath function in… CVSS 3.1CRITICAL 9.8
  • TI-2003-00642 The prescan function in Sendmail 8.12.9 allows remote attackers to execute arbitrary code… CVSS 2.0HIGH 10.0
See all 576 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences