9.8
CRITICAL
CVSS 3.1
CVE-2026-68158
libceph: Fix multiplication overflow in decode_new_up_state_weight()
Overview
Description
In the Linux kernel, the following vulnerability has been resolved: libceph: Fix multiplication overflow in decode_new_up_state_weight() If a message of type CEPH_MSG_OSD_MAP contains a (maliciously) corrupted osdmap, out-of-bounds memory accesses may occur in decode_new_up_state_weight(). This happens because the bounds check for the new_state part is based on calculating its length depending on a len value read from the incoming message. This calculation may overflow leading to an incorrect bounds check. Subsequently, out-of-bounds reads may occur when decoding this part. This patch switches the multiplication to use check_mul_overflow() to abort processing the osdmap if an overflow occurred. Therefore, osdmaps/messages containing large values for len that result in a multiplication overflow are treated as invalid. [ idryomov: rename new_state_len -> new_state_item_size, formatting ]
Details
INFO
Published Date :
Aug. 10, 2026, 1:20 p.m.
Last Modified :
Aug. 17, 2026, 5:18 a.m.
Remotely Exploit :
Yes !
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 | CRITICAL | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
Apply the Linux kernel patch to prevent multiplication overflow and out-of-bounds memory access.
- Update the Linux kernel to the patched version.
- Ensure check_mul_overflow() is used in decode_new_up_state_weight().
- Treat osdmaps with potential overflow values as invalid.
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-2026-68158.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-68158 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-2026-68158
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-2026-68158 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-68158 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 Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '930c532869774ebf8af9efe9484c597f896a7d46', 'lessThan': '05c90e059269f087becfcce23348496085835c29', 'versionType': 'git'}, {'status': 'affected', 'version': '930c532869774ebf8af9efe9484c597f896a7d46', 'lessThan': '143ba49ead77ec483c0326f8aaad8649874e99c4', 'versionType': 'git'}, {'status': 'affected', 'version': '930c532869774ebf8af9efe9484c597f896a7d46', 'lessThan': '1732d89dfcd74f6fde9ce70900d316c4a151c153', 'versionType': 'git'}, {'status': 'affected', 'version': '930c532869774ebf8af9efe9484c597f896a7d46', 'lessThan': 'bee4b5b53e7bff0467fd916cc44c9b190733c6bd', 'versionType': 'git'}, {'status': 'affected', 'version': '930c532869774ebf8af9efe9484c597f896a7d46', 'lessThan': '98917a499ec7064c14fc56d180a4fd636fc2784c', 'versionType': 'git'}, {'status': 'affected', 'version': '1196c36fd53c3b1615eb02f986cb727b1dfc1047', 'versionType': 'git'}, {'status': 'affected', 'version': 'bbc3aa6b0e6050b2b2e04a08dd4d6423d576b196', 'versionType': 'git'}, {'status': 'affected', 'version': '6b96b2d473701b45df3fea8dd9796b6ec39e6d54', 'versionType': 'git'}, {'status': 'affected', 'version': '7405d73cea0d0e6c541f5c534078feeb46188844', 'versionType': 'git'}, {'status': 'affected', 'version': '8777c9f654637d56f4c4ca54eb1bc7c609b70085', 'versionType': 'git'}, {'status': 'affected', 'version': '6831c98ce0b8a3e88db64aa224372effd0dcc694', 'versionType': 'git'}, {'status': 'affected', 'version': '032951d32c13b7564dfba82758260cb7aa1149d2', 'versionType': 'git'}, {'status': 'affected', 'version': '14877928f10667a5606383885d004f7185f33718', 'versionType': 'git'}, {'status': 'affected', 'version': '3.10.103', 'lessThan': '3.11', 'versionType': 'semver'}, {'status': 'affected', 'version': '3.12.63', 'lessThan': '3.13', 'versionType': 'semver'}, {'status': 'affected', 'version': '3.14.75', 'lessThan': '3.15', 'versionType': 'semver'}, {'status': 'affected', 'version': '3.16.39', 'lessThan': '3.17', 'versionType': 'semver'}, {'status': 'affected', 'version': '3.18.39', 'lessThan': '3.19', 'versionType': 'semver'}, {'status': 'affected', 'version': '4.1.30', 'lessThan': '4.2', 'versionType': 'semver'}, {'status': 'affected', 'version': '4.4.17', 'lessThan': '4.5', 'versionType': 'semver'}, {'status': 'affected', 'version': '4.6.6', 'lessThan': '4.7', 'versionType': 'semver'}], 'programFiles': ['net/ceph/osdmap.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.7'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.7', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc5', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/ceph/osdmap.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '930c532869774ebf8af9efe9484c597f896a7d46', 'lessThan': '05c90e059269f087becfcce23348496085835c29', 'versionType': 'git'}, {'status': 'affected', 'version': '930c532869774ebf8af9efe9484c597f896a7d46', 'lessThan': '143ba49ead77ec483c0326f8aaad8649874e99c4', 'versionType': 'git'}, {'status': 'affected', 'version': '930c532869774ebf8af9efe9484c597f896a7d46', 'lessThan': '1732d89dfcd74f6fde9ce70900d316c4a151c153', 'versionType': 'git'}, {'status': 'affected', 'version': '930c532869774ebf8af9efe9484c597f896a7d46', 'lessThan': 'bee4b5b53e7bff0467fd916cc44c9b190733c6bd', 'versionType': 'git'}, {'status': 'affected', 'version': '930c532869774ebf8af9efe9484c597f896a7d46', 'lessThan': '98917a499ec7064c14fc56d180a4fd636fc2784c', 'versionType': 'git'}, {'status': 'affected', 'version': '1196c36fd53c3b1615eb02f986cb727b1dfc1047', 'versionType': 'git'}, {'status': 'affected', 'version': 'bbc3aa6b0e6050b2b2e04a08dd4d6423d576b196', 'versionType': 'git'}, {'status': 'affected', 'version': '6b96b2d473701b45df3fea8dd9796b6ec39e6d54', 'versionType': 'git'}, {'status': 'affected', 'version': '7405d73cea0d0e6c541f5c534078feeb46188844', 'versionType': 'git'}, {'status': 'affected', 'version': '8777c9f654637d56f4c4ca54eb1bc7c609b70085', 'versionType': 'git'}, {'status': 'affected', 'version': '6831c98ce0b8a3e88db64aa224372effd0dcc694', 'versionType': 'git'}, {'status': 'affected', 'version': '032951d32c13b7564dfba82758260cb7aa1149d2', 'versionType': 'git'}, {'status': 'affected', 'version': '14877928f10667a5606383885d004f7185f33718', 'versionType': 'git'}, {'status': 'affected', 'version': '3.10.103', 'lessThan': '3.11', 'versionType': 'semver'}, {'status': 'affected', 'version': '3.12.63', 'lessThan': '3.13', 'versionType': 'semver'}, {'status': 'affected', 'version': '3.14.75', 'lessThan': '3.15', 'versionType': 'semver'}, {'status': 'affected', 'version': '3.16.39', 'lessThan': '3.17', 'versionType': 'semver'}, {'status': 'affected', 'version': '3.18.39', 'lessThan': '3.19', 'versionType': 'semver'}, {'status': 'affected', 'version': '4.1.30', 'lessThan': '4.2', 'versionType': 'semver'}, {'status': 'affected', 'version': '4.4.17', 'lessThan': '4.5', 'versionType': 'semver'}, {'status': 'affected', 'version': '4.6.6', 'lessThan': '4.7', 'versionType': 'semver'}], 'programFiles': ['net/ceph/osdmap.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.7'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.7', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/ceph/osdmap.c'], 'defaultStatus': 'affected'}] -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 13, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 10, 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': '930c532869774ebf8af9efe9484c597f896a7d46', 'lessThan': '05c90e059269f087becfcce23348496085835c29', 'versionType': 'git'}, {'status': 'affected', 'version': '930c532869774ebf8af9efe9484c597f896a7d46', 'lessThan': '143ba49ead77ec483c0326f8aaad8649874e99c4', 'versionType': 'git'}, {'status': 'affected', 'version': '930c532869774ebf8af9efe9484c597f896a7d46', 'lessThan': '1732d89dfcd74f6fde9ce70900d316c4a151c153', 'versionType': 'git'}, {'status': 'affected', 'version': '930c532869774ebf8af9efe9484c597f896a7d46', 'lessThan': 'bee4b5b53e7bff0467fd916cc44c9b190733c6bd', 'versionType': 'git'}, {'status': 'affected', 'version': '930c532869774ebf8af9efe9484c597f896a7d46', 'lessThan': '98917a499ec7064c14fc56d180a4fd636fc2784c', 'versionType': 'git'}, {'status': 'affected', 'version': '1196c36fd53c3b1615eb02f986cb727b1dfc1047', 'versionType': 'git'}, {'status': 'affected', 'version': 'bbc3aa6b0e6050b2b2e04a08dd4d6423d576b196', 'versionType': 'git'}, {'status': 'affected', 'version': '6b96b2d473701b45df3fea8dd9796b6ec39e6d54', 'versionType': 'git'}, {'status': 'affected', 'version': '7405d73cea0d0e6c541f5c534078feeb46188844', 'versionType': 'git'}, {'status': 'affected', 'version': '8777c9f654637d56f4c4ca54eb1bc7c609b70085', 'versionType': 'git'}, {'status': 'affected', 'version': '6831c98ce0b8a3e88db64aa224372effd0dcc694', 'versionType': 'git'}, {'status': 'affected', 'version': '032951d32c13b7564dfba82758260cb7aa1149d2', 'versionType': 'git'}, {'status': 'affected', 'version': '14877928f10667a5606383885d004f7185f33718', 'versionType': 'git'}, {'status': 'affected', 'version': '3.10.103', 'lessThan': '3.11', 'versionType': 'semver'}, {'status': 'affected', 'version': '3.12.63', 'lessThan': '3.13', 'versionType': 'semver'}, {'status': 'affected', 'version': '3.14.75', 'lessThan': '3.15', 'versionType': 'semver'}, {'status': 'affected', 'version': '3.16.39', 'lessThan': '3.17', 'versionType': 'semver'}, {'status': 'affected', 'version': '3.18.39', 'lessThan': '3.19', 'versionType': 'semver'}, {'status': 'affected', 'version': '4.1.30', 'lessThan': '4.2', 'versionType': 'semver'}, {'status': 'affected', 'version': '4.4.17', 'lessThan': '4.5', 'versionType': 'semver'}, {'status': 'affected', 'version': '4.6.6', 'lessThan': '4.7', 'versionType': 'semver'}], 'programFiles': ['net/ceph/osdmap.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.7'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.7', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc5', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/ceph/osdmap.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: libceph: Fix multiplication overflow in decode_new_up_state_weight() If a message of type CEPH_MSG_OSD_MAP contains a (maliciously) corrupted osdmap, out-of-bounds memory accesses may occur in decode_new_up_state_weight(). This happens because the bounds check for the new_state part is based on calculating its length depending on a len value read from the incoming message. This calculation may overflow leading to an incorrect bounds check. Subsequently, out-of-bounds reads may occur when decoding this part. This patch switches the multiplication to use check_mul_overflow() to abort processing the osdmap if an overflow occurred. Therefore, osdmaps/messages containing large values for len that result in a multiplication overflow are treated as invalid. [ idryomov: rename new_state_len -> new_state_item_size, formatting ] Added Reference https://git.kernel.org/stable/c/05c90e059269f087becfcce23348496085835c29 Added Reference https://git.kernel.org/stable/c/143ba49ead77ec483c0326f8aaad8649874e99c4 Added Reference https://git.kernel.org/stable/c/1732d89dfcd74f6fde9ce70900d316c4a151c153 Added Reference https://git.kernel.org/stable/c/98917a499ec7064c14fc56d180a4fd636fc2784c Added Reference https://git.kernel.org/stable/c/bee4b5b53e7bff0467fd916cc44c9b190733c6bd
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.