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Vulnerabilities

Security research · CVE-2025-39767

In the Linux kernel, the following vulnerability has been resolved: LoongArch: Optimize module load time by optimizing PLT/GOT counting When enabling CONFIG_KASAN, CON…

Published Sep 11, 2025 · catalog updated Oct 19, 2026 · linux kernel

Open the advisory

Exploitation likelihood is not on this record for CVE-2025-39767. A missing EPSS score is not a low risk. Compare linux kernel with the linked advisory before you change production.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
  • EPSS is missing. A missing score is not a low risk.
Severity
Medium5.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
Awaiting synchronization with FIRST
Remediation
Advisory link
Affected products
cpe linux/linux kernel

In the Linux kernel, the following vulnerability has been resolved: LoongArch: Optimize module load time by optimizing PLT/GOT counting When enabling CONFIG_KASAN, CONFIG_PREEMPT_VOLUNTARY_BUILD and CONFIG_PREEMPT_VOLUNTARY at the same time, there will be soft deadlock, the relevant logs are as follows: rcu: INFO: rcu_sched self-detected stall on CPU ... Call Trace: [ ] show_stack+0x5c/0x180 [ ] dump_stack_lvl+0x94/0xbc [ ] rcu_dump_cpu_stacks+0x1fc/0x280 [ ] rcu_sched_clock_irq+0x720/0xf88 [ ] update_process_times+0xb4/0x150 [ ] tick_nohz_handler+0xf4/0x250 [ ] __hrtimer_run_queues+0x1d0/0x428 [ ] hrtimer_interrupt+0x214/0x538 [ ] constant_timer_interrupt+0x64/0x80 [ ] __handle_irq_event_percpu+0x78/0x1a0 [ ] handle_irq_event_percpu+0x18/0x88 [ ] handle_percpu_irq+0x90/0xf0 [ ] handle_irq_desc+0x94/0xb8 [ ] handle_cpu_irq+0x68/0xa0 [ ] handle_loongarch_irq+0x30/0x48 [ ] do_vint+0x80/0xd0 [ ] kasan_mem_to_shadow.part.0+0x2c/0x2a0 [ ] __asan_load8+0x4c/0x120 [ ] module_frob_arch_sections+0x5c8/0x6b8 [ ] load_module+0x9e0/0x2958 [ ] __do_sys_init_module+0x208/0x2d0 [ ] do_syscall+0x94/0x190 [ ] handle_syscall+0xbc/0x158 After analysis, this is because the slow speed of loading the amdgpu module leads to the long time occupation of the cpu and then the soft deadlock. When loading a module, module_frob_arch_sections() tries to figure out the number of PLTs/GOTs that will be needed to handle all the RELAs. It will call the count_max_entries() to find in an out-of-order date which counting algorithm has O(n^2) complexity. To make it faster, we sort the relocation list by info and addend. That way, to check for a duplicate relocation, it just needs to compare with the previous entry. This reduces the complexity of the algorithm to O(n log n), as done in commit d4e0340919fb ("arm64/module: Optimize module load time by optimizing PLT counting"). This gives sinificant reduction in module load time for modules with large number of relocations. After applying this patch, the so

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  • cpe linux/linux kernel6.17

How to fix CVE-2025-39767

  • Recommended remediation

    A patch or advisory reference is linked. Open the original publisher for availability by product version.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

Exploitation likelihood is not on this record for CVE-2025-39767. A missing EPSS score is not a low risk. Compare linux kernel with the linked advisory before you change production.

Which versions are affected?

Compare what you have installed with linux/linux kernel 6.17. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-667. EPSS is not on this record yet. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Sep 11, 2025 · NIST NVD

    Detected

    In the Linux kernel, the following vulnerability has been resolved: LoongArch: Optimize module load time by optimizing PLT/GOT counting When enabling CONFIG_KASAN, CONFIG_PREEMPT_VOLUNTARY_BUILD and CONFIG_PREEMPT_VOLUNTARY at the same time, there will be soft deadlock, the relevant logs are as follows: rcu: INFO: rcu_sched self-detected stall on CPU ... Call Trace: [ ] show_stack+0x5c/0x180 [ ] d

  2. Oct 19, 2026 · NIST NVD

    Updated

    In the Linux kernel, the following vulnerability has been resolved: LoongArch: Optimize module load time by optimizing PLT/GOT counting When enabling CONFIG_KASAN, CONFIG_PREEMPT_VOLUNTARY_BUILD and CONFIG_PREEMPT_VOLUNTARY at the same time, there will be soft deadlock, the relevant logs are as follows: rcu: INFO: rcu_sched self-detected stall on CPU ... Call Trace: [ ] show_stack+0x5c/0x180 [ ] d

Sources

  • NIST NVDVulnerability recordCVE-2025-39767

    In the Linux kernel, the following vulnerability has been resolved: LoongArch: Optimize module load time by optimizing PLT/GOT counting When enabling CONFIG_KASAN, CONFIG_PREEMPT_VOLUNTARY_BUILD and CONFIG_PREEMPT_VOLUNTARY at the same time, there will be soft deadlock, the rel

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 19, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.