Answer in brief
CVE-2026-68156 records a Critical severity (CVSS 9.8) vulnerability in libceph: refresh auth->authorizer_buf{,_len} after authorizer update. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=0bed9b5c523d577378b6f83eab5835fe30c27208 <9d37aec9ffe4e743dabc3f84502e9723e17a30d4 || >=0bed9b5c523d577378b6f83eab5835fe30c27208 <75e82e8944ac1efe9fdb88bd2f14d9a031282bdf || >=0bed9b5c523d577378b6f83eab5835fe30c27208 <0060ec912292a550198d8d18ac95b433c92a7091 || >=0bed9b5c523d577378b6f83eab5835fe30c27208 <5ecfcd5c05866f185357700b81b461dae4f5ebb2 || >=0bed9b5c523d577378b6f83eab5835fe30c27208 <937d61f86d377a3aa578adae7a3dfcecdddf9d89 || 29c65a277a64645af853e8c9a9b3dda0ddc421e0 || d2c7223497cf8228416c70e3f4238ddd6c5bdf3c || >=3.4.50 <3.5 || >=3.9.7 <3.10 | 9d37aec9ffe4e743dabc3f84502e9723e17a30d4, 75e82e8944ac1efe9fdb88bd2f14d9a031282bdf, 0060ec912292a550198d8d18ac95b433c92a7091, 5ecfcd5c05866f185357700b81b461dae4f5ebb2, 937d61f86d377a3aa578adae7a3dfcecdddf9d89, 3.5, 3.10 |
| Linux/Linuxgeneric | 3.10 | Not reported |
| Linux/Linuxgeneric | >=0bed9b5c523d577378b6f83eab5835fe30c27208 <2334e9997308305ee4fd508fdfe6086c4150ed60 || >=0bed9b5c523d577378b6f83eab5835fe30c27208 <79a273df64238a4ade8b709689a78589f755b8ef || >=0bed9b5c523d577378b6f83eab5835fe30c27208 <26f814187abceee90dbb29a02133adb4786fbb13 || >=0bed9b5c523d577378b6f83eab5835fe30c27208 <9d37aec9ffe4e743dabc3f84502e9723e17a30d4 || >=0bed9b5c523d577378b6f83eab5835fe30c27208 <75e82e8944ac1efe9fdb88bd2f14d9a031282bdf || >=0bed9b5c523d577378b6f83eab5835fe30c27208 <0060ec912292a550198d8d18ac95b433c92a7091 || >=0bed9b5c523d577378b6f83eab5835fe30c27208 <5ecfcd5c05866f185357700b81b461dae4f5ebb2 || >=0bed9b5c523d577378b6f83eab5835fe30c27208 <937d61f86d377a3aa578adae7a3dfcecdddf9d89 || 29c65a277a64645af853e8c9a9b3dda0ddc421e0 || d2c7223497cf8228416c70e3f4238ddd6c5bdf3c || >=3.4.50 <3.5 || >=3.9.7 <3.10 | 2334e9997308305ee4fd508fdfe6086c4150ed60, 79a273df64238a4ade8b709689a78589f755b8ef, 26f814187abceee90dbb29a02133adb4786fbb13, 9d37aec9ffe4e743dabc3f84502e9723e17a30d4, 75e82e8944ac1efe9fdb88bd2f14d9a031282bdf, 0060ec912292a550198d8d18ac95b433c92a7091, 5ecfcd5c05866f185357700b81b461dae4f5ebb2, 937d61f86d377a3aa578adae7a3dfcecdddf9d89, 3.5, 3.10 |
Published upstream
Aug 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 10, 2026
In the Linux kernel, the following vulnerability has been resolved: libceph: refresh auth->authorizer_buf{,_len} after authorizer update ceph_x_create_authorizer() caches au->buf->vec.iov_base and au->buf->vec.iov_len in struct ceph_auth_handshake. These cached values are then used by the messenger connect code when sending the authorizer. ceph_x_update_authorizer() can rebuild the authorizer when a newer service ticket is available. If the rebuilt authorizer no longer fits in the existing buffer, ceph_x_build_authorizer() drops its reference to au->buf and allocates a new one. If this is the final reference, ceph_buffer_put() frees the old ceph_buffer and its vec.iov_base, but auth->authorizer_buf still points at that freed memory. A subsequent msgr1 reconnect can therefore queue the stale pointer and trigger a KASAN slab-use-after-free in _copy_from_iter() while tcp_sendmsg() copies the authorizer. Refresh auth->authorizer_buf and auth->authorizer_buf_len after a successful authorizer rebuild so the messenger sends the current buffer.
Quoted source text, attributed separately from HOL analysis.