CVE-2025-39880Critical· 9.8▾ MidnightIn the Linux kernel, the following vulnerability has been resolved: libceph: fix invalid accesses to ceph_connection_v1_info There is a place where generic code in messenger.c is reading and another place where it is writing to con->v1…
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 53.9 · 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 15.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.3%
In the Linux kernel, the following vulnerability has been resolved:
libceph: fix invalid accesses to ceph_connection_v1_info
There is a place where generic code in messenger.c is reading and another place where it is writing to con->v1 union member without checking that the union member is active (i.e. msgr1 is in use).
On 64-bit systems, con->v1.auth_retry overlaps with con->v2.out_iter, so such a read is almost guaranteed to return a bogus value instead of 0 when msgr2 is in use. This ends up being fairly benign because the side effect is just the invalidation of the authorizer and successive fetching of new tickets.
con->v1.connect_seq overlaps with con->v2.conn_bufs and the fact that it's being written to can cause more serious consequences, but luckily it's not something that happens often.
Linux >= cd1a677cad994021b19665ed476aea63f5d54f31 < ea12ab684f8ae8a6da11a22c78d94a79e2163096Linux >= cd1a677cad994021b19665ed476aea63f5d54f31 < 591ea9c30737663a471b2bb07b27ddde86b020d5Linux >= cd1a677cad994021b19665ed476aea63f5d54f31 < 23538cfbeed87159a5ac6c61e7a6de3d8d4486a8Linux >= cd1a677cad994021b19665ed476aea63f5d54f31 < 35dbbc3dbf8bccb2d77c68444f42c1e6d2d27983Linux >= cd1a677cad994021b19665ed476aea63f5d54f31 < 6bd8b56899be0b514945f639a89ccafb8f8dfaefLinux >= cd1a677cad994021b19665ed476aea63f5d54f31 < cdbc9836c7afadad68f374791738f118263c5371Linux 5.11Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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