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[Issue]: dlopen() of a truncated plugin .so causes SIGBUS crash instead of graceful fallback (NCCL_PROFILER_PLUGIN / NET / TUNER / ENV)

Status: Open.

#2367 In NVIDIA/nccl;

· AdamSabry1233 opened on Aug 24, 2026

[Issue]: Single-rank communicator initializes a large NET shared P2P buffer

Status: Open.

#2363 In NVIDIA/nccl;

· wanna-01 opened on Aug 21, 2026

[Bug]: ncclStrToCpuset() uses non-reentrant strtok()

Status: Open.

#2361 In NVIDIA/nccl;

· antgun42 opened on Aug 19, 2026

[Bug] Hopper NVLS BF16 results depend on multicast allocation history and differ across H800 hosts with identical software

Status: Open.

#2360 In NVIDIA/nccl;

· wqshr12345 opened on Aug 19, 2026

[Issue]: Profiler plugin overhead regression after upgrading to NCCL 2.31.2

Status: Open.

#2355 In NVIDIA/nccl;

· hzhengBd opened on Aug 18, 2026

[Issue]: SIGSEGV in bootstrapRoot getenv() via ncclSocketDefaultMagic, racy under glibc <2.41

Status: Open.

#2354 In NVIDIA/nccl;

· fjosw opened on Aug 18, 2026

[Issue]: Deadlock between ncclLocalOpAppend and the proxy progress thread when the proxy op pool is exhausted

Status: Open.

#2353 In NVIDIA/nccl;

· Cryspia opened on Aug 18, 2026

[Question]: Question about LLA2A endEpoch, why could an error occur when epoch = 0xFFFFFFFE and the next epoch becomes 2?

question

Status: Open.

#2352 In NVIDIA/nccl;

· carpediem0309 opened on Aug 18, 2026

[Issue]: NCCL Checkpoint - Restore deadlocks forever in SHM's cuMem host-NUMA path; NCCL_CUMEM_HOST_ENABLE=0 fixes it

Status: Open.

#2350 In NVIDIA/nccl;

· nicolexin opened on Aug 17, 2026

[Issue]: NCCL Checkpoint - ncclCheckpointRestore() can block indefinitely with no timeout and no diagnostic

Status: Open.

#2349 In NVIDIA/nccl;

· nicolexin opened on Aug 17, 2026

[Issue]: NCCL Checkpoint - getHostHash() is cached across checkpoint/restore; restored communicators use a stale host identity

Status: Open.

#2348 In NVIDIA/nccl;

· nicolexin opened on Aug 17, 2026

[Issue]: NCCL Checkpoint - allocInitParams() reads past the end of a caller-supplied ncclConfig_t (with version skew)

Status: Open.

#2347 In NVIDIA/nccl;

· nicolexin opened on Aug 17, 2026