CVE-2023-26496
Published: 23 March 2023
Summary
CVE-2023-26496 is a high-severity Out-of-bounds Write (CWE-787) vulnerability in Samsung Exynos Modem 5300 Firmware. Its CVSS base score is 8.6 (High).
Operationally, ranked in the top 10.1% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
CVE-2023-26496 is a memory corruption vulnerability in the SDP module of Samsung's Baseband Modem Chipset, affecting Exynos Modem 5123, Exynos Modem 5300, Exynos 980, Exynos 1080, and Exynos Auto T5124. The flaw stems from improper validation of parameter length when parsing the fmtp attribute, classified under CWE-787 as an out-of-bounds write and carrying a CVSS 3.1 score of 8.6.
An unauthenticated attacker with network access can send a crafted SDP message to trigger the corruption. Successful exploitation can result in limited impacts to confidentiality and integrity alongside high availability consequences, such as denial of service against the modem.
Samsung's product security updates page provides the primary reference for mitigation guidance and any available firmware patches for the affected modem chipsets.
The EPSS score rose materially from a low baseline to a peak of 0.2517 before receding to the current value of 0.0493, indicating a period of increased exploitation interest after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-30295
Vulnerability details
An issue was discovered in Samsung Baseband Modem Chipset for Exynos Modem 5123, Exynos Modem 5300, Exynos 980, Exynos 1080, and Exynos Auto T5124. Memory corruption can occur due to improper checking of the parameter length while parsing the fmtp…
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attribute in the SDP (Session Description Protocol) module.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Out-of-bounds writes that corrupt control flow or inject shellcode are rendered non-executable by the same memory protections.