What is CVE-2025-40155?

CVE-2025-40155 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 6.7 onward and patched in 6.12.53, 6.17.3 and 6.18. CVE-2025-40155 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-40155?

CVE-2025-40155 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2025-40155?

Yes, CVE-2025-40155 has been patched. Fixed versions include 6.12.53, 6.17.3 and 6.18. If you are running Linux kernel 6.7 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-40155 actively exploited?

CVE-2025-40155 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2025-40155

In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: debugfs: Fix legacy mode page table dump logic In legacy mode, SSPTPTR is ignored if TT is not 00b or 01b. SSPTPTR maybe uninitialized or zero in that case and may cause oops like: Oops: general protection fault, probably for non-canonical address 0xf00087d3f000f000: 0000 [#1] SMP NOPTI CPU: 2 UID: 0 PID: 786 Comm: cat Not tainted 6.16.0 #191 PREEMPT(voluntary) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.17.0-5.fc42 04/01/2014 RIP: 0010:pgtable_walk_level+0x98/0x150 RSP: 0018:ffffc90000f279c0 EFLAGS: 00010206 RAX: 0000000040000000 RBX: ffffc90000f27ab0 RCX: 000000000000001e RDX: 0000000000000003 RSI: f00087d3f000f000 RDI: f00087d3f0010000 RBP: ffffc90000f27a00 R08: ffffc90000f27a98 R09: 0000000000000002 R10: 0000000000000000 R11: 0000000000000000 R12: f00087d3f000f000 R13: 0000000000000000 R14: 0000000040000000 R15: ffffc90000f27a98 FS: 0000764566dcb740(0000) GS:ffff8881f812c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000764566d44000 CR3: 0000000109d81003 CR4: 0000000000772ef0 PKRU: 55555554 Call Trace: <TASK> pgtable_walk_level+0x88/0x150 domain_translation_struct_show.isra.0+0x2d9/0x300 dev_domain_translation_struct_show+0x20/0x40 seq_read_iter+0x12d/0x490 ... Avoid walking the page table if TT is not 00b or 01b.

Package Linux Kernel

Published 2025-11-12

Last modified 2026-04-15

Patch available

Yes

Affected versions

Linux kernel versions 6.7 and later are affected. Fixed in 6.12.53, 6.17.3, 6.18 and their respective stable series.

Affected from

≥ 6.7

Fixed in

✓ 6.12.53 6.12.x ✓ 6.17.3 6.17.x ✓ 6.18

References

The following references provide additional information about CVE-2025-40155 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/d8cf7b59c49f9118fa875462e18686cb6b131bb5
Patch
Kernel patch commit
https://git.kernel.org/stable/c/df2bf759a0bdb71f13e327d7527260d09facc055
Patch
Kernel patch commit
https://git.kernel.org/stable/c/fbe6070c73badca726e4ff7877320e6c62339917
Patch

Frequently asked questions

What is CVE-2025-40155?

CVE-2025-40155 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.7 onward and has been patched in 6.12.53, 6.17.3 and 6.18. CVE-2025-40155 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2025-40155?

Yes — CVE-2025-40155 has been patched. Fixed versions include 6.12.53, 6.17.3 and 6.18. If you are running Linux kernel 6.7 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-40155 actively exploited?

No — CVE-2025-40155 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.