VulnerabilityPublished 29 Oct 2026

CVE-2026-88386: libsndfile security update

Affects libsndfileSource GCVE Database

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Authoritative record:CVE-2026-88386· Medium 5.5

Not known to be exploited · CVSS 5.5 Medium : upgrade to 1.2.2-7.oe2403sp1 when convenient.

Data as of 29 Oct 2026, 11:04 UTC

CVSS 3.1 base score

5.5Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.1% chance of exploitation in 30 days – higher than 4% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 1.2.2-7.oe2403sp1

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector: Local
Attack Complexity: Low
Privileges Required: None
User Interaction: Required
Scope: Unchanged
Confidentiality: None
Integrity: None
Availability: High

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Local: The vulnerable component is not bound to the network stack and the attacker’s path is via read/write/execute capabilities. Either: the attacker exploits the vulnerability by accessing the target system locally (e.g., keyboard, console), or remotely (e.g., SSH); or the attacker relies on User Interaction by another person to perform actions required to exploit the vulnerability (e.g., tricking a legitimate user into opening a malicious document).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: Required: Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: None: There is no loss of confidentiality within the impacted component.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: High: There is total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 24 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade libsndfile to 1.2.2-7.oe2403sp1.

Affected software

Product	Affected	Fixed in
openEuler 24.03-LTS-SP1libsndfile`pkg:rpm/openEuler/libsndfile&distro=openEuler-24.03-LTS-SP1`Other threats	Affected <1.2.2-7.oe2403sp1	Fixed in 1.2.2-7.oe2403sp1

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Users should upgrade libsndfile to version 1.2.2-7.oe2403sp1 or later where the issue is fixed. Applying this official patch fully mitigates the vulnerability. No additional mitigations are specified or required.

Description

Libsndfile version 1.2.2 addresses a security vulnerability involving a misaligned memory access in the psf_binheader_readf() function when parsing WAV fmt chunks. This flaw can be triggered by a specially crafted WAV file, causing undefined behavior that leads to a denial of service condition. The issue is fixed in version 1.2.2-7.oe2403sp1.

Impact

An attacker can cause a denial of service by supplying a specially crafted WAV file that triggers a misaligned memory write in libsndfile. There is no impact on confidentiality or integrity reported. The CVSS 3.1 base score is 5.5 (medium severity), reflecting a local attack vector with low complexity and no privileges required but requiring user interaction.

Summary

The vulnerability in libsndfile affects the psf_binheader_readf() function responsible for parsing WAV format chunks. Specifically, the function performs a 4-byte store to an unaligned destination address cast as an unsigned int pointer, resulting in undefined behavior. This can be exploited by a maliciously crafted WAV file to cause a denial of service. The flaw is resolved in libsndfile version 1.2.2-7.oe2403sp1.

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 29 Oct 2026, 11:04 UTC

Technical details

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