CVE-2023-29088Public exploitNetwork attack vector

Service interruption via malformed SIP Session-Expires header

Published Apr 14, 2023 · Updated Feb 7, 2025

Memory corruption in Samsung Exynos modem SIP decoding allows remote attackers to interrupt cellular service via a Session-Expires header. The SIP decoder in IMSPL_SipDecode.c applies insufficient length validation before placing the header value in a stack buffer, causing an out-of-bounds write. No authentication or user interaction is required, but exploitation affects availability only and depends on a reachable SIP path to the baseband.

CVSS severity6.8
Medium
EPSS probability0.75%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in Samsung Exynos modem SIP decoding allows remote attackers to interrupt cellular service via a Session-Expires header. The SIP decoder in IMSPL_SipDecode.c applies insufficient length validation before placing the header value in a stack buffer, causing an out-of-bounds write. No authentication or user interaction is required, but exploitation affects availability only and depends on a reachable SIP path to the baseband.

The record

CVE
CVE-2023-29088
Published
Apr 14, 2023
Updated
Feb 7, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 7, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
6.8MITRECVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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