Strix
26.1K

CVE-2026-68158

Unknown

Last modified

CVE-2026-68158 is a vulnerability of currently unknown severity. 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.

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 ]

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 930c532869774ebf8af9efe9484c597f896a7d46, < 05c90e059269f087becfcce23348496085835c29; >= 930c532869774ebf8af9efe9484c597f896a7d46, < 143ba49ead77ec483c0326f8aaad8649874e99c4; >= 930c532869774ebf8af9efe9484c597f896a7d46, < 1732d89dfcd74f6fde9ce70900d316c4a151c153; >= 930c532869774ebf8af9efe9484c597f896a7d46, < bee4b5b53e7bff0467fd916cc44c9b190733c6bd; >= 930c532869774ebf8af9efe9484c597f896a7d46, < 98917a499ec7064c14fc56d180a4fd636fc2784c; 1196c36fd53c3b1615eb02f986cb727b1dfc1047; bbc3aa6b0e6050b2b2e04a08dd4d6423d576b196; 6b96b2d473701b45df3fea8dd9796b6ec39e6d54; 7405d73cea0d0e6c541f5c534078feeb46188844; 8777c9f654637d56f4c4ca54eb1bc7c609b70085; 6831c98ce0b8a3e88db64aa224372effd0dcc694; 032951d32c13b7564dfba82758260cb7aa1149d2; 14877928f10667a5606383885d004f7185f33718; >= 3.10.103, < 3.11; >= 3.12.63, < 3.13; >= 3.14.75, < 3.15; >= 3.16.39, < 3.17; >= 3.18.39, < 3.19; >= 4.1.30, < 4.2; >= 4.4.17, < 4.5; >= 4.6.6, < 4.7
LinuxLinux4.7

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-68158?
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 ]
How severe is CVE-2026-68158?
Severity scoring for CVE-2026-68158 is pending analysis.
How do I fix CVE-2026-68158?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

Related CVEs from 2026

View all 2026CVEs →

Are you affected by CVE-2026-68158?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST