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TI-2026-74630 Aliases CVE-2026-101308GHSA-pmrj-w7pv-p57q

Race in FreeBSD sound(4) buffer resizing causes use-after-free

Priority LOW 23CWE-367Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.

Summary

FreeBSD from 15.1-RELEASE before p5, from 14.5-RELEASE before p2 and from 14.4-RELEASE before p11 are affected. A race (CWE-367) in the sound(4) driver lets an mmap(2) call on another thread map an audio buffer after the driver checks it, then frees the mapped buffer during a resize. An unprivileged local user with access to a sound device can trigger a kernel use-after-free, potentially escalating privileges.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

When an audio channel's buffer needs to be resized, the sound(4) driver checks that the buffer is not memory-mapped and then drops the channel lock to allocate a new buffer. An mmap(2) call on another thread can complete during this window, after which the resize path frees the now-mapped buffer without rechecking. An unprivileged local user with access to a sound device can exploit this race to trigger a use-after-free in the kernel, potentially escalating privileges.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00074 0th percentileScored 2026-11-07
Fix Fixed FreeBSD (FreeBSD): p5, p2, p11

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

VendorProductAffected versionsFixed inStatusSource
FreeBSDFreeBSD15.1-RELEASE to before p5; 14.5-RELEASE to before p2; 14.4-RELEASE to before p11p5, p2, p11Patch availableCNA
  • FreeBSD VendorFreeBSD Affected 15.1-RELEASE to before p5; 14.5-RELEASE to before p2; 14.4-RELEASE to before p11 Fixed in p5, p2, p11 Patch available CNA

CPE configurations NVD · 18

CPEVersionsRoleVendor
cpe:2.3:o:freebsd:freebsd:14.4:-:*:*:*:*:*:*14.4VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:14.4:p1:*:*:*:*:*:*14.4 p1VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:14.4:p10:*:*:*:*:*:*14.4 p10VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:14.4:p2:*:*:*:*:*:*14.4 p2VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:14.4:p3:*:*:*:*:*:*14.4 p3VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:14.4:p4:*:*:*:*:*:*14.4 p4VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:14.4:p5:*:*:*:*:*:*14.4 p5VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:14.4:p6:*:*:*:*:*:*14.4 p6VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:14.4:p7:*:*:*:*:*:*14.4 p7VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:14.4:p8:*:*:*:*:*:*14.4 p8VulnerableFreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.4:-:*:*:*:*:*:* Versions 14.4 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.4:p1:*:*:*:*:*:* Versions 14.4 p1 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.4:p10:*:*:*:*:*:* Versions 14.4 p10 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.4:p2:*:*:*:*:*:* Versions 14.4 p2 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.4:p3:*:*:*:*:*:* Versions 14.4 p3 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.4:p4:*:*:*:*:*:* Versions 14.4 p4 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.4:p5:*:*:*:*:*:* Versions 14.4 p5 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.4:p6:*:*:*:*:*:* Versions 14.4 p6 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.4:p7:*:*:*:*:*:* Versions 14.4 p7 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.4:p8:*:*:*:*:*:* Versions 14.4 p8 Vulnerable ·FreeBSD
Show 8 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:freebsd:freebsd:14.4:p9:*:*:*:*:*:*14.4 p9VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:14.5:-:*:*:*:*:*:*14.5VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:14.5:p1:*:*:*:*:*:*14.5 p1VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:15.1:-:*:*:*:*:*:*15.1VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:15.1:p1:*:*:*:*:*:*15.1 p1VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:15.1:p2:*:*:*:*:*:*15.1 p2VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:15.1:p3:*:*:*:*:*:*15.1 p3VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:15.1:p4:*:*:*:*:*:*15.1 p4VulnerableFreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.4:p9:*:*:*:*:*:* Versions 14.4 p9 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.5:-:*:*:*:*:*:* Versions 14.5 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.5:p1:*:*:*:*:*:* Versions 14.5 p1 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:15.1:-:*:*:*:*:*:* Versions 15.1 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:15.1:p1:*:*:*:*:*:* Versions 15.1 p1 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:15.1:p2:*:*:*:*:*:* Versions 15.1 p2 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:15.1:p3:*:*:*:*:*:* Versions 15.1 p3 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:15.1:p4:*:*:*:*:*:* Versions 15.1 p4 Vulnerable ·FreeBSD

Remediation

Update FreeBSD 15.1-RELEASE to p5, 14.5-RELEASE to p2 or 14.4-RELEASE to p11.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA FreeBSD (FreeBSD) Fixed in p5, p2, p11

Timeline

  1. 2026-10-15 Threatist record created from CVE-2026-101308
  2. 2026-10-16 Alias added: GHSA-pmrj-w7pv-p57q

References

Patch 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