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Linux KernelOperating system · Linux

CVE-2025-38239

HIGH · 7.8 CVSS v3.1 Published 2025-07-09
Fix available
A fix is available. Upgrade to 6.1.143 / 6.6.96 or later.
See remediation →
80/100
Remediation priority · High
Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
In the Linux kernel, the following vulnerability has been resolved: scsi: megaraid_sas: Fix invalid node index On a system with DRAM interleave enabled, out-of-bound access is detected: megaraid_sas 0000:3f:00.0: requested/available msix 128/128 poll_queue 0 ------------[ cut here ]------------ UBSAN: array-index-out-of-bounds in ./arch/x86/include/asm/topology.h:72:28 index -1 is out of range for type 'cpumask *[1024]' dump_stack_lvl+0x5d/0x80 ubsan_epilogue+0x5/0x2b __ubsan_handle_out_of_bounds.cold+0x46/0x4b megasas_alloc_irq_vectors+0x149/0x190 [megaraid_sas] megasas_probe_one.cold+0xa4d/0x189c [megaraid_sas] local_pci_probe+0x42/0x90 pci_device_probe+0xdc/0x290 really_probe+0xdb/0x340 __driver_probe_device+0x78/0x110 driver_probe_device+0x1f/0xa0 __driver_attach+0xba/0x1c0 bus_for_each_dev+0x8b/0xe0 bus_add_driver+0x142/0x220 driver_register+0x72/0xd0 megasas_init+0xdf/0xff0 [megaraid_sas] do_one_initcall+0x57/0x310 do_init_module+0x90/0x250 init_module_from_file+0x85/0xc0 idempotent_init_module+0x114/0x310 __x64_sys_finit_module+0x65/0xc0 do_syscall_64+0x82/0x170 entry_SYSCALL_64_after_hwframe+0x76/0x7e Fix it accordingly.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis

A detailed technical summary for this CVE is being prepared.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Linux KernelOperating system
Affected:>= 5.17, < 6.1.143>= 6.2, < 6.6.96>= 6.7, < 6.12.36>= 6.13, < 6.15.5= 6.16
Debian LinuxOperating system
Affected:= 11.0

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 6.1.143 / 6.6.96 / 6.12.36 or later
Fixed in 6.1.1436.6.966.12.36
Vendor patch git.kernel.org →
Recommended fix High confidence

Upgrade to kernel 6.1.143+, 6.6.96+, 6.12.36+, or 6.15.5+ (depending on your current branch)

  1. Check current kernel version with: uname -r
  2. Identify which kernel branch you are on (e.g., 6.1.x, 6.6.x, 6.7.x, 6.13.x)
  3. For kernel 5.17-6.1.x: upgrade to kernel version >= 6.1.143
  4. For kernel 6.2-6.6.x: upgrade to kernel version >= 6.6.96
  5. For kernel 6.7-6.12.x: upgrade to kernel version >= 6.12.36
  6. For kernel 6.13-6.14.x: upgrade to kernel version >= 6.15.5
  7. For Debian 11 (bullseye): apply Debian kernel security update when available, or upgrade to a newer Debian release
  8. Reboot the system to load the fixed kernel
Caveat Kernel upgrades may require rebuild of third-party kernel modules; ensure compatibility with existing system configuration before upgrading

Generated from the published advisory — verify against the referenced sources before acting.

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $1,950. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-38239 in production — separate from our analysis above.

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  • Version or environment caveats, and links to real fixes
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