CVE-2026-43630

llama.cpp b4882-b8487 Out-of-Bounds Read Information Disclosure

Published Aug 6, 2026 CVSS 4.0 · 6.3 Medium EPSS < 1% KEV · Not listed

Description

llama.cpp builds b4882 before b8487 contain an out-of-bounds read vulnerability in the recurrent memory state restore path that allows attackers with write access to the slot save directory to read memory past the end of the allocated cells array. Attackers can craft a malicious slot file with an oversized seq_id value to trigger an out-of-bounds read that leaks heap data including pointer values into server logs, defeating ASLR protections and facilitating further exploitation.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

ggml-org

llama.cpp

unaffected

Version	Status	Constraints
`b4882`	affected	< b8487

Configuration 1 [-]

cpe:2.3:a:ggml:llama.cpp:*:*:*:*:*:*:*:*

No data.

Vendor Product Versions

Ggml-org

Llama.cpp

Version	Status	Scheme	Platform
`[b5702,b7653]`	affected	generic	—
`0.17.1`	affected	semver	—

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

No advisories available

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.498% probability within 30 days)

Exploitation none

Automatable yes

Technical Impact partial

References

Link	Providers
https://github.com/Vladimir-tokarev-cyera/llama-cpp-security-patches
https://github.com/ggml-org/llama.cpp
https://github.com/ggml-org/llama.cpp/commit/f93c09e2673090b59802f2552848a1cac70598b0
https://nvd.nist.gov/vuln/detail/CVE-2026-43630
https://www.cve.org/CVERecord?id=CVE-2026-43630
https://www.vulncheck.com/advisories/llama-cpp-b5702-b7653-out-of-bounds-read-information-disclosure

History

Oct 22, 2026 6:30 PM Description updated. Title updated View changes

Type	Values Removed	Values Added
Description	llama.cpp builds b5702 through b7653 contain an out-of-bounds read vulnerability in the recurrent memory state restore path that allows attackers with write access to the slot save directory to read memory past the end of the allocated cells array. Attackers can craft a malicious slot file with an oversized seq_id value to trigger an out-of-bounds read that leaks heap data including pointer values into server logs, defeating ASLR protections and facilitating further exploitation.	llama.cpp builds b4882 before b8487 contain an out-of-bounds read vulnerability in the recurrent memory state restore path that allows attackers with write access to the slot save directory to read memory past the end of the allocated cells array. Attackers can craft a malicious slot file with an oversized seq_id value to trigger an out-of-bounds read that leaks heap data including pointer values into server logs, defeating ASLR protections and facilitating further exploitation.
Title	llama.cpp b5702–b7653 Out-of-Bounds Read Information Disclosure	llama.cpp b4882-b8487 Out-of-Bounds Read Information Disclosure

Aug 14, 2026 5:15 PM First appearance in the feed. Affected versions updated. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Ggml Ggml llama.cpp
CPEs		cpe:2.3:a:ggml:llama.cpp:::::::: cpe:2.3:a:ggml:llama.cpp:0.17.1:::::::*
Vendors & Products		Ggml Ggml llama.cpp

Aug 12, 2026 12:15 AM Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
References		https://nvd.nist.gov/vuln/detail/CVE-2026-43630 https://www.cve.org/CVERecord?id=CVE-2026-43630
Metrics	threat_severity `None`	threat_severity `Moderate`

Aug 7, 2026 7:15 PM Added references View changes

Type	Values Removed	Values Added
References		https://www.vulncheck.com/advisories/llama-cpp-b5702-b7653-out-of-bounds-read-information-disclosure

Aug 7, 2026 5:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Aug 7, 2026 2:15 AM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Ggml-org Ggml-org llama.cpp
Vendors & Products		Ggml-org Ggml-org llama.cpp

Aug 6, 2026 10:15 PM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		llama.cpp builds b5702 through b7653 contain an out-of-bounds read vulnerability in the recurrent memory state restore path that allows attackers with write access to the slot save directory to read memory past the end of the allocated cells array. Attackers can craft a malicious slot file with an oversized seq_id value to trigger an out-of-bounds read that leaks heap data including pointer values into server logs, defeating ASLR protections and facilitating further exploitation.
Title		llama.cpp b5702–b7653 Out-of-Bounds Read Information Disclosure
Weaknesses		CWE-125 CWE-209
References		https://github.com/Vladimir-tokarev-cyera/llama-cpp-security-patches https://github.com/ggml-org/llama.cpp https://github.com/ggml-org/llama.cpp/commit/f93c09e2673090b59802f2552848a1cac70598b0
Metrics		cvssV3_1 `{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L'}` cvssV4_0 `{'score': 6.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N'}`