Answer in brief
CVE-2024-56701 records a Medium severity (CVSS 5.5) vulnerability in powerpc/pseries: Fix dtl_access_lock to be a rw_semaphore. 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.
CVSS is 5.5. 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.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | 5.3 | Not reported |
| Linux/Linuxgeneric | >=06220d78f24a20549757be1014e57c382406cc92 <6956c0e7346ce1bbfc726755aa8da10d26e84276 || >=06220d78f24a20549757be1014e57c382406cc92 <f6ec133668757f84e5143f1eb141fd0b83778b9e || >=06220d78f24a20549757be1014e57c382406cc92 <fa5b5ea257135e771b489c83a2e93b5935d0108e || >=06220d78f24a20549757be1014e57c382406cc92 <a246daa26b717e755ccc9061f47f7cd1c0b358dd || >=06220d78f24a20549757be1014e57c382406cc92 <b125d0cf1adde7b2b47d7337fed7e9133eea3463 || >=06220d78f24a20549757be1014e57c382406cc92 <525e18f1ba7c2b098c8ba587fb397efb34a6574c || >=06220d78f24a20549757be1014e57c382406cc92 <cadae3a45d23aa4f6485938a67cbc47aaaa25e38 | 6956c0e7346ce1bbfc726755aa8da10d26e84276, f6ec133668757f84e5143f1eb141fd0b83778b9e, fa5b5ea257135e771b489c83a2e93b5935d0108e, a246daa26b717e755ccc9061f47f7cd1c0b358dd, b125d0cf1adde7b2b47d7337fed7e9133eea3463, 525e18f1ba7c2b098c8ba587fb397efb34a6574c, cadae3a45d23aa4f6485938a67cbc47aaaa25e38 |
Published upstream
Dec 28, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 5, 2026
In the Linux kernel, the following vulnerability has been resolved: powerpc/pseries: Fix dtl_access_lock to be a rw_semaphore The dtl_access_lock needs to be a rw_sempahore, a sleeping lock, because the code calls kmalloc() while holding it, which can sleep: # echo 1 > /proc/powerpc/vcpudispatch_stats BUG: sleeping function called from invalid context at include/linux/sched/mm.h:337 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 199, name: sh preempt_count: 1, expected: 0 3 locks held by sh/199: #0: c00000000a0743f8 (sb_writers#3){.+.+}-{0:0}, at: vfs_write+0x324/0x438 #1: c0000000028c7058 (dtl_enable_mutex){+.+.}-{3:3}, at: vcpudispatch_stats_write+0xd4/0x5f4 #2: c0000000028c70b8 (dtl_access_lock){+.+.}-{2:2}, at: vcpudispatch_stats_write+0x220/0x5f4 CPU: 0 PID: 199 Comm: sh Not tainted 6.10.0-rc4 #152 Hardware name: IBM pSeries (emulated by qemu) POWER9 (raw) 0x4e1202 0xf000005 of:SLOF,HEAD hv:linux,kvm pSeries Call Trace: dump_stack_lvl+0x130/0x148 (unreliable) __might_resched+0x174/0x410 kmem_cache_alloc_noprof+0x340/0x3d0 alloc_dtl_buffers+0x124/0x1ac vcpudispatch_stats_write+0x2a8/0x5f4 proc_reg_write+0xf4/0x150 vfs_write+0xfc/0x438 ksys_write+0x88/0x148 system_call_exception+0x1c4/0x5a0 system_call_common+0xf4/0x258
Quoted source text, attributed separately from HOL analysis.