CVE-2023-26498
Published: 23 March 2023
Summary
CVE-2023-26498 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-2023-26498 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 T5126. It stems from improper validation of the number of properties when parsing the chatroom attribute, which can trigger an out-of-bounds write (CWE-787). The flaw carries a CVSS 3.1 score of 8.6.
An unauthenticated attacker can exploit the issue over the network by sending a crafted SDP message containing an oversized chatroom attribute. Successful exploitation can result in memory corruption that leads to denial of service or limited information disclosure and modification on the affected modem.
Samsung's product security updates page and related semiconductor documentation direct users and device manufacturers to apply the latest baseband firmware patches that address the parsing flaw.
The associated EPSS score rose from a low baseline to a peak of 0.2517 before receding to its current value of 0.0493, indicating that exploitation interest increased after public disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-30297
Vulnerability details
An issue was discovered in Samsung Baseband Modem Chipset for Exynos Modem 5123, Exynos Modem 5300, Exynos 980, Exynos 1080, Exynos Auto T5126. Memory corruption can occur due to improper checking of the number of properties while parsing the chatroom…
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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.