CVE-2025-21713

MEDIUM EPSS 8.7%
Published Feb 27, 20251y ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Feb 27, 2025 1y ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: powerpc/pseries/iommu: Don't unset window if it was never set On pSeries, when user attempts to use the same vfio container used by different iommu group, the spapr_tce_set_window() returns -EPERM and the subsequent cleanup leads to the below crash. Kernel attempted to read user page (308) - exploit attempt? BUG: Kernel NULL pointer dereference on read at 0x00000308 Faulting instruction address: 0xc0000000001ce358 Oops: Kernel access of bad area, sig: 11 [#1] NIP: c0000000001ce358 LR: c0000000001ce05c CTR: c00000000005add0 <snip> NIP [c0000000001ce358] spapr_tce_unset_window+0x3b8/0x510 LR [c0000000001ce05c] spapr_tce_unset_window+0xbc/0x510 Call Trace: spapr_tce_unset_window+0xbc/0x510 (unreliable) tce_iommu_attach_group+0x24c/0x340 [vfio_iommu_spapr_tce] vfio_container_attach_group+0xec/0x240 [vfio] vfio_group_fops_unl_ioctl+0x548/0xb00 [vfio] sys_ioctl+0x754/0x1580 system_call_exception+0x13c/0x330 system_call_vectored_common+0x15c/0x2ec <snip> --- interrupt: 3000 Fix this by having null check for the tbl passed to the spapr_tce_unset_window().

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
8.7% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 2

VendorProductVersionRange
linuxlinux_kernel*≥6.11  –  <6.12.13
linuxlinux_kernel*≥6.13  –  <6.13.2

References 3

  • git.kernel.org https://git.kernel.org/stable/c/17391cb2613b82f8c405570fea605af3255ff8d2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ac12372a13dab3f7a2762db240bd180de8ef1e5e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b853ff0b514c1df314246fcf94744005914b48cb
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/17391cb2613b82f8c405570fea605af3255ff8d2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ac12372a13dab3f7a2762db240bd180de8ef1e5e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b853ff0b514c1df314246fcf94744005914b48cb
    Patch