CVE-2023-49100

MEDIUMNVD 4.44.4—
EchelonGraph scoreMEDIUM confidence

Score 4.4 from GitHub Security Advisory published 2024-02-21. NVD baseline CVSS 4.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
4.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.4Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Trusted Firmware-A (TF-A) before 2.10 has a potential read out-of-bounds in the SDEI service. The input parameter passed in register x1 is not validated well enough in the function sdei_interrupt_bind. The parameter is passed to a call to plat_ic_get_interrupt_type. It can be any arbitrary value passing checks in the function plat_ic_is_sgi. A compromised Normal World (Linux kernel) can enable a root-privileged attacker to issue arbitrary SMC calls. Using this primitive, he can control the content of registers x0 through x6, which are used to send parameters to TF-A. Out-of-bounds addresses can be read in the context of TF-A (EL3). Because the read value is never returned to non-secure memory or in registers, no leak is possible. An attacker can still crash TF-A, however.

CVSS v3
4.4
EG Score
4.4(medium)
EG Risk
20(Track)
EG Risk 20/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity44% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
13%
KEV
Not listed

Published

February 21, 2024

Last Modified

April 15, 2026

References (6)

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 46× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 146 total refreshes for this CVE.

  1. 2026-08-07 16:25 UTCEPSS rescore
  2. 2026-08-06 13:45 UTCEPSS rescore
  3. 2026-08-05 19:15 UTCEPSS rescore
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  14. 2026-07-28 17:59 UTCOSV refresh
  15. 2026-07-28 15:34 UTCEPSS rescore
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  23. 2026-07-23 02:28 UTCEG score recompute
  24. 2026-07-22 23:14 UTCEG score recompute
  25. 2026-07-22 14:06 UTCEPSS rescore
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  1. 2026-07-21 15:23 UTCEPSS rescore
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  3. 2026-07-20 17:06 UTCEPSS rescore
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  18. 2026-07-12 05:45 UTCEPSS rescore
  19. 2026-07-11 10:11 UTCOSV refresh
  20. 2026-07-11 08:26 UTCEPSS rescore
  21. 2026-07-09 19:08 UTCEPSS rescore
  22. 2026-07-08 15:13 UTCEPSS rescore
  23. 2026-07-07 13:44 UTCEPSS rescore
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  25. 2026-07-06 16:26 UTCEPSS rescore
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  44. 2026-06-23 21:31 UTCEPSS rescore
  45. 2026-06-23 21:31 UTCEPSS rescore
  46. 2026-06-22 16:35 UTCOSV refresh
  47. 2026-06-22 14:24 UTCEPSS rescore
  48. 2026-06-22 14:24 UTCEPSS rescore
  49. 2026-06-21 14:55 UTCEPSS rescore
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  51. 2026-06-21 01:58 UTCEPSS rescore
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  55. 2026-06-18 17:51 UTCEPSS rescore
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  63. 2026-06-12 23:11 UTCEPSS rescore
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  65. 2026-06-11 13:59 UTCEPSS rescore
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  67. 2026-06-10 13:21 UTCEPSS rescore
  68. 2026-06-08 14:16 UTCEPSS rescore
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  70. 2026-06-07 15:24 UTCEPSS rescore
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  72. 2026-06-06 13:46 UTCEPSS rescore
  73. 2026-06-06 13:46 UTCEPSS rescore
  74. 2026-06-05 22:46 UTCEPSS rescore
  75. 2026-06-05 22:46 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2023-49100?
CVE-2023-49100 is a medium vulnerability published on February 21, 2024. Trusted Firmware-A (TF-A) before 2.10 has a potential read out-of-bounds in the SDEI service. The input parameter passed in register x1 is not validated well enough in the function sdeiinterruptbind. The parameter is passed to a call to platicgetinterrupttype. It can be any arbitrary value passing…
When was CVE-2023-49100 disclosed?
CVE-2023-49100 was first published in the National Vulnerability Database on February 21, 2024, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-49100 actively exploited?
CVE-2023-49100 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 86.9% of all scored CVEs.
What is the CVSS score of CVE-2023-49100?
CVE-2023-49100 has a CVSS v3 base score of 4.4 (NVD).
How do I remediate CVE-2023-49100?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-49100, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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