Kernel-memory disclosure via overflowing OSD map length
Published Aug 10, 2026 · Updated Aug 10, 2026
Out-of-bounds read in affected Linux kernel versions allows remote attackers to read kernel memory via a corrupted CEPH_MSG_OSD_MAP. decode_new_up_state_weight() multiplies a message-supplied item count to size the new_state bounds check; integer wraparound makes the check accept a too-short buffer. Exposure requires libceph to accept an attacker-controlled OSD map; consequences are kernel-memory disclosure or a system crash.
Summary
What happened
Out-of-bounds read in affected Linux kernel versions allows remote attackers to read kernel memory via a corrupted CEPH_MSG_OSD_MAP. decode_new_up_state_weight() multiplies a message-supplied item count to size the new_state bounds check; integer wraparound makes the check accept a too-short buffer. Exposure requires libceph to accept an attacker-controlled OSD map; consequences are kernel-memory disclosure or a system crash.
The record
- CVE
- CVE-2026-68158
- Published
- Aug 10, 2026
- Updated
- Aug 10, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-125
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 10, 2026CVE publishedPublication date reported by the CVE source.
- Aug 10, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=032951d32c13b7564dfba82758260cb7aa1149d2
- Affected versionversion=1196c36fd53c3b1615eb02f986cb727b1dfc1047
- Affected versionversion=14877928f10667a5606383885d004f7185f33718
- Affected versionversion=3.10.103 <3.11
- Affected versionversion=3.12.63 <3.13
- Affected versionversion=3.14.75 <3.15
- Affected versionversion=3.16.39 <3.17
- Affected versionversion=3.18.39 <3.19
- Affected versionversion=4.1.30 <4.2
- Affected versionversion=4.4.17 <4.5
- Affected versionversion=4.6.6 <4.7
- Affected versionversion=4.7
- Affected versionversion=6831c98ce0b8a3e88db64aa224372effd0dcc694
- Affected versionversion=6b96b2d473701b45df3fea8dd9796b6ec39e6d54
- Affected versionversion=7405d73cea0d0e6c541f5c534078feeb46188844
- Affected versionversion=8777c9f654637d56f4c4ca54eb1bc7c609b70085
- Affected versionversion=930c532869774ebf8af9efe9484c597f896a7d46 <05c90e059269f087becfcce23348496085835c29
- Affected versionversion=930c532869774ebf8af9efe9484c597f896a7d46 <143ba49ead77ec483c0326f8aaad8649874e99c4
- Affected versionversion=930c532869774ebf8af9efe9484c597f896a7d46 <1732d89dfcd74f6fde9ce70900d316c4a151c153
- Affected versionversion=930c532869774ebf8af9efe9484c597f896a7d46 <98917a499ec7064c14fc56d180a4fd636fc2784c
- Affected versionversion=930c532869774ebf8af9efe9484c597f896a7d46 <bee4b5b53e7bff0467fd916cc44c9b190733c6bd
- Affected versionversion=bbc3aa6b0e6050b2b2e04a08dd4d6423d576b196
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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