CVE-2026-68433

In the Linux kernel, the following vulnerability has been resolved: libceph: bound get_version reply decode to front len handle_get_version_reply() uses msg->front_alloc_len as the decode boundary for MON_GET_VERSION_REPLY. That is the size of the reused reply buffer, not the number of bytes actually received. A truncated reply can therefore pass ceph_decode_need() and decode the second u64 from stale tail bytes left in the buffer by an earlier message, causing an uninitialized memory read. Use msg->front.iov_len as the receive-side decode boundary, matching other libceph reply handlers and limiting decoding to the bytes that were actually read from the wire.

CVSS v3 8.6 HIGH

8.6^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 4.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/0d934c934ec746d53fc7e4f53239792647bbae63
https://git.kernel.org/stable/c/1307028f082756bf453e1889aee9983d30643a4b
https://git.kernel.org/stable/c/340e0386aa39da181015bee38f309018c335ce16
https://git.kernel.org/stable/c/4e7ebfaa0d14cf50e44041bfde38070d6dbc019f
https://git.kernel.org/stable/c/72a35070fcefa229b1b031aa7482ad3788e18f07
https://git.kernel.org/stable/c/d3c32939fa0e3ee9b883b9a0fd1972c5c444e3d0
https://git.kernel.org/stable/c/d60de8253c85a02d0e6194b0735e7a562981a04c
https://git.kernel.org/stable/c/f6cbf6878f3a1503c872ba8f1e69a58ee68d8b2e

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-12 00:17

Updated : 2026-08-19 17:20

NVD link : CVE-2026-68433

Mitre link : CVE-2026-68433

CVE.ORG link : CVE-2026-68433

JSON object : View

Products Affected

No product.

CWE

No CWE.

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That is the size of the reused\nreply buffer, not the number of bytes actually received.\n\nA truncated reply can therefore pass ceph_decode_need() and decode the\nsecond u64 from stale tail bytes left in the buffer by an earlier\nmessage, causing an uninitialized memory read.\n\nUse msg->front.iov_len as the receive-side decode boundary, matching\nother libceph reply handlers and limiting decoding to the bytes that\nwere actually read from the wire."}], "lastModified": "2026-08-19T17:20:50.170", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}