What is CVE-2023-54239?

CVE-2023-54239 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 6.2 onward and patched in 6.2.11 and 6.3. CVE-2023-54239 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-54239?

CVE-2023-54239 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2023-54239?

Yes, CVE-2023-54239 has been patched. Fixed versions include 6.2.11 and 6.3. If you are running Linux kernel 6.2 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2023-54239 actively exploited?

CVE-2023-54239 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2023-54239

In the Linux kernel, the following vulnerability has been resolved: iommufd: Check for uptr overflow syzkaller found that setting up a map with a user VA that wraps past zero can trigger WARN_ONs, particularly from pin_user_pages weirdly returning 0 due to invalid arguments. Prevent creating a pages with a uptr and size that would math overflow. WARNING: CPU: 0 PID: 518 at drivers/iommu/iommufd/pages.c:793 pfn_reader_user_pin+0x2e6/0x390 Modules linked in: CPU: 0 PID: 518 Comm: repro Not tainted 6.3.0-rc2-eeac8ede1755+ #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014 RIP: 0010:pfn_reader_user_pin+0x2e6/0x390 Code: b1 11 e9 25 fe ff ff e8 28 e4 0f ff 31 ff 48 89 de e8 2e e6 0f ff 48 85 db 74 0a e8 14 e4 0f ff e9 4d ff ff ff e8 0a e4 0f ff <0f> 0b bb f2 ff ff ff e9 3c ff ff ff e8 f9 e3 0f ff ba 01 00 00 00 RSP: 0018:ffffc90000f9fa30 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff821e2b72 RDX: 0000000000000000 RSI: ffff888014184680 RDI: 0000000000000002 RBP: ffffc90000f9fa78 R08: 00000000000000ff R09: 0000000079de6f4e R10: ffffc90000f9f790 R11: ffff888014185418 R12: ffffc90000f9fc60 R13: 0000000000000002 R14: ffff888007879800 R15: 0000000000000000 FS: 00007f4227555740(0000) GS:ffff88807dc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000043 CR3: 000000000e748005 CR4: 0000000000770ef0 PKRU: 55555554 Call Trace: <TASK> pfn_reader_next+0x14a/0x7b0 ? interval_tree_double_span_iter_update+0x11a/0x140 pfn_reader_first+0x140/0x1b0 iopt_pages_rw_slow+0x71/0x280 ? __this_cpu_preempt_check+0x20/0x30 iopt_pages_rw_access+0x2b2/0x5b0 iommufd_access_rw+0x19f/0x2f0 iommufd_test+0xd11/0x16f0 ? write_comp_data+0x2f/0x90 iommufd_fops_ioctl+0x206/0x330 __x64_sys_ioctl+0x10e/0x160 ? __pfx_iommufd_fops_ioctl+0x10/0x10 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc

Package Linux Kernel

Published 2025-12-30

Last modified 2026-04-15

Patch available

Yes

Affected versions

Linux kernel versions 6.2 and later are affected. Fixed in 6.2.11, 6.3 and their respective stable series.

Affected from

≥ 6.2

Fixed in

✓ 6.2.11 6.2.x ✓ 6.3

References

The following references provide additional information about CVE-2023-54239 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/800963e7eb001ada8cf2418f159fb649694467f1
Patch
Kernel patch commit
https://git.kernel.org/stable/c/e4395701330fc4aee530905039516fe770b81417
Patch

Frequently asked questions

What is CVE-2023-54239?

CVE-2023-54239 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.2 onward and has been patched in 6.2.11 and 6.3. CVE-2023-54239 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2023-54239?

Yes — CVE-2023-54239 has been patched. Fixed versions include 6.2.11 and 6.3. If you are running Linux kernel 6.2 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2023-54239 actively exploited?

No — CVE-2023-54239 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.