7.8
HIGH
CVSS 3.1
CVE-2026-68479
Bluetooth: btrtl: validate firmware patch bounds
Overview
Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btrtl: validate firmware patch bounds rtlbt_parse_firmware() copies patch_length - 4 bytes before appending the firmware version. A malformed firmware patch shorter than the version field can make this subtraction underflow and turn the copy into an oversized read and write during Bluetooth setup. The existing patch_offset + patch_length check can also wrap on 32-bit architectures. Validate the patch length and range without arithmetic overflow before allocating or copying the patch.
Details
INFO
Published Date :
Aug. 15, 2026, 6:20 a.m.
Last Modified :
Aug. 17, 2026, 6:17 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework
for assessing the severity of vulnerabilities in software and systems.
We collect and displays CVSS scores from various sources for each CVE.
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
Validate firmware patch length and bounds to prevent buffer overflows and memory corruption.
- Apply the Linux kernel patch for Bluetooth.
- Validate firmware patch length before copying data.
- Ensure patch offsets and lengths do not overflow.
- Perform bounds checking on firmware patches.
References
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-68479.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-68479 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-68479
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-68479 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-68479 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'db33c77dddc2ed2cff3061d0b096a9f5ab0c3647', 'lessThan': '39e01b4addfbbe177567d6ed1dfb81f9cccb19e6', 'versionType': 'git'}, {'status': 'affected', 'version': 'db33c77dddc2ed2cff3061d0b096a9f5ab0c3647', 'lessThan': 'bda3c598ade6ea03884074b91e31608326684921', 'versionType': 'git'}, {'status': 'affected', 'version': 'db33c77dddc2ed2cff3061d0b096a9f5ab0c3647', 'lessThan': 'a4cb830e0b55ac76c849fd7840afb251f4c028fa', 'versionType': 'git'}, {'status': 'affected', 'version': 'db33c77dddc2ed2cff3061d0b096a9f5ab0c3647', 'lessThan': '68c5a2a19987c035eb129e627e579adafb04f637', 'versionType': 'git'}, {'status': 'affected', 'version': 'db33c77dddc2ed2cff3061d0b096a9f5ab0c3647', 'lessThan': '83534891c058ed71e251135072640911670869aa', 'versionType': 'git'}, {'status': 'affected', 'version': 'db33c77dddc2ed2cff3061d0b096a9f5ab0c3647', 'lessThan': '6744ab60dfac55d1df5733960aad5be300984301', 'versionType': 'git'}, {'status': 'affected', 'version': 'db33c77dddc2ed2cff3061d0b096a9f5ab0c3647', 'lessThan': 'f1ca750c0510bdbb504bf084d2f196ef2af92ea6', 'versionType': 'git'}, {'status': 'affected', 'version': 'db33c77dddc2ed2cff3061d0b096a9f5ab0c3647', 'lessThan': '609c5b04a28dc1b0f3af6a7bc93055135b2d2059', 'versionType': 'git'}], 'programFiles': ['drivers/bluetooth/btrtl.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.2'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.2', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc4', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/bluetooth/btrtl.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'db33c77dddc2ed2cff3061d0b096a9f5ab0c3647', 'lessThan': '39e01b4addfbbe177567d6ed1dfb81f9cccb19e6', 'versionType': 'git'}, {'status': 'affected', 'version': 'db33c77dddc2ed2cff3061d0b096a9f5ab0c3647', 'lessThan': 'bda3c598ade6ea03884074b91e31608326684921', 'versionType': 'git'}, {'status': 'affected', 'version': 'db33c77dddc2ed2cff3061d0b096a9f5ab0c3647', 'lessThan': 'a4cb830e0b55ac76c849fd7840afb251f4c028fa', 'versionType': 'git'}, {'status': 'affected', 'version': 'db33c77dddc2ed2cff3061d0b096a9f5ab0c3647', 'lessThan': '68c5a2a19987c035eb129e627e579adafb04f637', 'versionType': 'git'}, {'status': 'affected', 'version': 'db33c77dddc2ed2cff3061d0b096a9f5ab0c3647', 'lessThan': '83534891c058ed71e251135072640911670869aa', 'versionType': 'git'}, {'status': 'affected', 'version': 'db33c77dddc2ed2cff3061d0b096a9f5ab0c3647', 'lessThan': '6744ab60dfac55d1df5733960aad5be300984301', 'versionType': 'git'}, {'status': 'affected', 'version': 'db33c77dddc2ed2cff3061d0b096a9f5ab0c3647', 'lessThan': 'f1ca750c0510bdbb504bf084d2f196ef2af92ea6', 'versionType': 'git'}, {'status': 'affected', 'version': 'db33c77dddc2ed2cff3061d0b096a9f5ab0c3647', 'lessThan': '609c5b04a28dc1b0f3af6a7bc93055135b2d2059', 'versionType': 'git'}], 'programFiles': ['drivers/bluetooth/btrtl.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.2'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.2', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/bluetooth/btrtl.c'], 'defaultStatus': 'affected'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 15, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'db33c77dddc2ed2cff3061d0b096a9f5ab0c3647', 'lessThan': '39e01b4addfbbe177567d6ed1dfb81f9cccb19e6', 'versionType': 'git'}, {'status': 'affected', 'version': 'db33c77dddc2ed2cff3061d0b096a9f5ab0c3647', 'lessThan': 'bda3c598ade6ea03884074b91e31608326684921', 'versionType': 'git'}, {'status': 'affected', 'version': 'db33c77dddc2ed2cff3061d0b096a9f5ab0c3647', 'lessThan': 'a4cb830e0b55ac76c849fd7840afb251f4c028fa', 'versionType': 'git'}, {'status': 'affected', 'version': 'db33c77dddc2ed2cff3061d0b096a9f5ab0c3647', 'lessThan': '68c5a2a19987c035eb129e627e579adafb04f637', 'versionType': 'git'}, {'status': 'affected', 'version': 'db33c77dddc2ed2cff3061d0b096a9f5ab0c3647', 'lessThan': '83534891c058ed71e251135072640911670869aa', 'versionType': 'git'}, {'status': 'affected', 'version': 'db33c77dddc2ed2cff3061d0b096a9f5ab0c3647', 'lessThan': '6744ab60dfac55d1df5733960aad5be300984301', 'versionType': 'git'}, {'status': 'affected', 'version': 'db33c77dddc2ed2cff3061d0b096a9f5ab0c3647', 'lessThan': 'f1ca750c0510bdbb504bf084d2f196ef2af92ea6', 'versionType': 'git'}, {'status': 'affected', 'version': 'db33c77dddc2ed2cff3061d0b096a9f5ab0c3647', 'lessThan': '609c5b04a28dc1b0f3af6a7bc93055135b2d2059', 'versionType': 'git'}], 'programFiles': ['drivers/bluetooth/btrtl.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.2'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.2', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc4', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/bluetooth/btrtl.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btrtl: validate firmware patch bounds rtlbt_parse_firmware() copies patch_length - 4 bytes before appending the firmware version. A malformed firmware patch shorter than the version field can make this subtraction underflow and turn the copy into an oversized read and write during Bluetooth setup. The existing patch_offset + patch_length check can also wrap on 32-bit architectures. Validate the patch length and range without arithmetic overflow before allocating or copying the patch. Added Reference https://git.kernel.org/stable/c/39e01b4addfbbe177567d6ed1dfb81f9cccb19e6 Added Reference https://git.kernel.org/stable/c/609c5b04a28dc1b0f3af6a7bc93055135b2d2059 Added Reference https://git.kernel.org/stable/c/6744ab60dfac55d1df5733960aad5be300984301 Added Reference https://git.kernel.org/stable/c/68c5a2a19987c035eb129e627e579adafb04f637 Added Reference https://git.kernel.org/stable/c/83534891c058ed71e251135072640911670869aa Added Reference https://git.kernel.org/stable/c/a4cb830e0b55ac76c849fd7840afb251f4c028fa Added Reference https://git.kernel.org/stable/c/bda3c598ade6ea03884074b91e31608326684921 Added Reference https://git.kernel.org/stable/c/f1ca750c0510bdbb504bf084d2f196ef2af92ea6
EPSS is a daily estimate of the probability of exploitation activity
being observed over the next 30 days. Following chart shows the EPSS
score history of the vulnerability.