Answer in brief
CVE-2026-68156 records a Unknown severity 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). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. 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). 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 |
Published upstream
Aug 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 10, 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.
Answer in brief
CVE-2026-68156 records a Unknown severity 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). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. 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). 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 |
Published upstream
Aug 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 10, 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.