CVE-2026-46119Critical· 9.1▾ MidnightIn the Linux kernel, the following vulnerability has been resolved: libceph: Fix slab-out-of-bounds access in auth message processing If a (potentially corrupted) message of type CEPH_MSG_AUTH_REPLY contains a positive value in its res…
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 50.1 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Oct 16.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.5%
Last analysed / modified upstream
In the Linux kernel, the following vulnerability has been resolved:
libceph: Fix slab-out-of-bounds access in auth message processing
If a (potentially corrupted) message of type CEPH_MSG_AUTH_REPLY contains a positive value in its result field, it is treated as an error code by ceph_handle_auth_reply() and returned to handle_auth_reply(). Thereafter, an attempt is made to send the preallocated message of type CEPH_MSG_AUTH, where the returned value is interpreted as the size of the front segment to send. If the result value in the message is greater than the size of the memory buffer allocated for the front segment, an out-of-bounds access occurs, and the content of the memory region beyond this buffer is sent out.
This patch fixes the issue by treating only negative values in the result field as errors. Positive values are therefore treated as success in the same way as a zero value. Additionally, a BUG_ON is added to __send_prepared_auth_request() comparing the len parameter to front_alloc_len to prevent sending the message if it exceeds the bounds of the allocation and to make it easier to catch any logic flaws leading to this.
Linux >= 4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc < c2374b92c729d0388a538b3cde7b3e3b5e55ef39Linux >= 4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc < 38fdf04c602d52c42c67fc1617211492753b7e8bLinux >= 4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc < 2ae0afd98432536562fa8261538ae795446f0589Linux >= 4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc < 408e85ee708b6aa03eeb0220ffa0915f4d407181Linux >= 4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc < b7df9fbd4869fdfe09a3f501ffd228486521e062Linux >= 4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc < 8517b6c8d2c759918ba0058cb6c7e14d59643202Linux >= 4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc < 1c439de70b1c3eb3c6bffa8245c16b9fc318f114Linux 2.6.34Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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