Answer in brief
CVE-2023-54173 records a Unknown severity vulnerability in bpf: Disable preemption in bpf_event_output. 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 | >=2a916f2f546ca1c1e3323e2a4269307f6d9890eb <3048cb0dc0cc9dc74ed93690dffef00733bcad5b || >=2a916f2f546ca1c1e3323e2a4269307f6d9890eb <c81bdf8f9f2b002d217c3d5357cdea9f2b82ff90 || >=2a916f2f546ca1c1e3323e2a4269307f6d9890eb <36dd8ca330b76585640ed32255a3c99f901e1502 || >=2a916f2f546ca1c1e3323e2a4269307f6d9890eb <063c9ce8e74e07bf94f99cd13146f42867875e8b || >=2a916f2f546ca1c1e3323e2a4269307f6d9890eb <d62cc390c2e99ae267ffe4b8d7e2e08b6c758c32 | 3048cb0dc0cc9dc74ed93690dffef00733bcad5b, c81bdf8f9f2b002d217c3d5357cdea9f2b82ff90, 36dd8ca330b76585640ed32255a3c99f901e1502, 063c9ce8e74e07bf94f99cd13146f42867875e8b, d62cc390c2e99ae267ffe4b8d7e2e08b6c758c32 |
| Linux/Linuxgeneric | 5.7 | Not reported |
Published upstream
Dec 30, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: bpf: Disable preemption in bpf_event_output We received report [1] of kernel crash, which is caused by using nesting protection without disabled preemption. The bpf_event_output can be called by programs executed by bpf_prog_run_array_cg function that disabled migration but keeps preemption enabled. This can cause task to be preempted by another one inside the nesting protection and lead eventually to two tasks using same perf_sample_data buffer and cause crashes like: BUG: kernel NULL pointer dereference, address: 0000000000000001 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0010) - not-present page ... ? perf_output_sample+0x12a/0x9a0 ? finish_task_switch.isra.0+0x81/0x280 ? perf_event_output+0x66/0xa0 ? bpf_event_output+0x13a/0x190 ? bpf_event_output_data+0x22/0x40 ? bpf_prog_dfc84bbde731b257_cil_sock4_connect+0x40a/0xacb ? xa_load+0x87/0xe0 ? __cgroup_bpf_run_filter_sock_addr+0xc1/0x1a0 ? release_sock+0x3e/0x90 ? sk_setsockopt+0x1a1/0x12f0 ? udp_pre_connect+0x36/0x50 ? inet_dgram_connect+0x93/0xa0 ? __sys_connect+0xb4/0xe0 ? udp_setsockopt+0x27/0x40 ? __pfx_udp_push_pending_frames+0x10/0x10 ? __sys_setsockopt+0xdf/0x1a0 ? __x64_sys_connect+0xf/0x20 ? do_syscall_64+0x3a/0x90 ? entry_SYSCALL_64_after_hwframe+0x72/0xdc Fixing this by disabling preemption in bpf_event_output. [1] https://github.com/cilium/cilium/issues/26756
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2023-54173 records a Unknown severity vulnerability in bpf: Disable preemption in bpf_event_output. 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 | >=2a916f2f546ca1c1e3323e2a4269307f6d9890eb <3048cb0dc0cc9dc74ed93690dffef00733bcad5b || >=2a916f2f546ca1c1e3323e2a4269307f6d9890eb <c81bdf8f9f2b002d217c3d5357cdea9f2b82ff90 || >=2a916f2f546ca1c1e3323e2a4269307f6d9890eb <36dd8ca330b76585640ed32255a3c99f901e1502 || >=2a916f2f546ca1c1e3323e2a4269307f6d9890eb <063c9ce8e74e07bf94f99cd13146f42867875e8b || >=2a916f2f546ca1c1e3323e2a4269307f6d9890eb <d62cc390c2e99ae267ffe4b8d7e2e08b6c758c32 | 3048cb0dc0cc9dc74ed93690dffef00733bcad5b, c81bdf8f9f2b002d217c3d5357cdea9f2b82ff90, 36dd8ca330b76585640ed32255a3c99f901e1502, 063c9ce8e74e07bf94f99cd13146f42867875e8b, d62cc390c2e99ae267ffe4b8d7e2e08b6c758c32 |
| Linux/Linuxgeneric | 5.7 | Not reported |
Published upstream
Dec 30, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: bpf: Disable preemption in bpf_event_output We received report [1] of kernel crash, which is caused by using nesting protection without disabled preemption. The bpf_event_output can be called by programs executed by bpf_prog_run_array_cg function that disabled migration but keeps preemption enabled. This can cause task to be preempted by another one inside the nesting protection and lead eventually to two tasks using same perf_sample_data buffer and cause crashes like: BUG: kernel NULL pointer dereference, address: 0000000000000001 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0010) - not-present page ... ? perf_output_sample+0x12a/0x9a0 ? finish_task_switch.isra.0+0x81/0x280 ? perf_event_output+0x66/0xa0 ? bpf_event_output+0x13a/0x190 ? bpf_event_output_data+0x22/0x40 ? bpf_prog_dfc84bbde731b257_cil_sock4_connect+0x40a/0xacb ? xa_load+0x87/0xe0 ? __cgroup_bpf_run_filter_sock_addr+0xc1/0x1a0 ? release_sock+0x3e/0x90 ? sk_setsockopt+0x1a1/0x12f0 ? udp_pre_connect+0x36/0x50 ? inet_dgram_connect+0x93/0xa0 ? __sys_connect+0xb4/0xe0 ? udp_setsockopt+0x27/0x40 ? __pfx_udp_push_pending_frames+0x10/0x10 ? __sys_setsockopt+0xdf/0x1a0 ? __x64_sys_connect+0xf/0x20 ? do_syscall_64+0x3a/0x90 ? entry_SYSCALL_64_after_hwframe+0x72/0xdc Fixing this by disabling preemption in bpf_event_output. [1] https://github.com/cilium/cilium/issues/26756
Quoted source text, attributed separately from HOL analysis.