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NVD / CVE Program· CNA Linux

CVE-2024-36926: powerpc/pseries/iommu: LPAR panics during boot up with a frozen PE

MediumCVSS 5.5 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.24% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 2bed905a72485a2b79a001bd7e66c750942d2155, 49a940dbdc3107fecd5e6d3063dc07128177e058, 5.19; azl3 kernel 6.6.29.1-5 on Azure Linux 3.0 6.6.35.1-4; azl3 kernel 6.6.35.1-4 on Azure Linux 3.0 6.6.35.1-4.

Low priority for now. Upgrade to Linux Linux 2bed905a72485a2b79a001bd7e66c750942d2155, 49a940dbdc3107fecd5e6d3063dc07128177e058, 5.19; azl3 kernel 6.6.29.1-5 on Azure Linux 3.0 6.6.35.1-4; azl3 kernel 6.6.35.1-4 on Azure Linux 3.0 6.6.35.1-4 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: powerpc/pseries/iommu: LPAR panics during boot up with a frozen PE At the time of LPAR boot up, partition firmware provides Open Firmware property ibm,dma-window for the PE. This property is provided on the PCI bus the PE is attached to. There are execptions where the partition firmware might not provide this property for the PE at the time of LPAR boot up. One of the scenario is where the firmware has frozen the PE due to some error condition. This PE is frozen for 24 hours or unless the whole system is reinitialized. Within this time frame, if the LPAR is booted, the frozen PE will be presented to the LPAR but ibm,dma-window property could be missing. Today, under these circumstances, the LPAR oopses with NULL pointer dereference, when configuring the PCI bus the PE is attached to. BUG: Kernel NULL pointer dereference on read at 0x000000c8 Faulting instruction address: 0xc0000000001024c0 Oops: Kernel access of bad area, sig: 7 [#1] LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=2048 NUMA pSeries Modules linked in: Supported: Yes CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.4.0-150600.9-default #1 Hardware name: IBM,9043-MRX POWER10 (raw) 0x800200 0xf000006 of:IBM,FW1060.00 (NM1060_023) hv:phyp pSeries NIP: c0000000001024c0 LR: c0000000001024b0 CTR: c000000000102450 REGS: c0000000037db5c0 TRAP: 0300 Not tainted (6.4.0-150600.9-default) MSR: 8000000002009033 <SF,VEC,EE,ME,IR,DR,RI,LE> CR: 28000822 XER: 00000000 CFAR: c00000000010254c DAR: 00000000000000c8 DSISR: 00080000 IRQMASK: 0 ... NIP [c0000000001024c0] pci_dma_bus_setup_pSeriesLP+0x70/0x2a0 LR [c0000000001024b0] pci_dma_bus_setup_pSeriesLP+0x60/0x2a0 Call Trace: pci_dma_bus_setup_pSeriesLP+0x60/0x2a0 (unreliable) pcibios_setup_bus_self+0x1c0/0x370 __of_scan_bus+0x2f8/0x330 pcibios_scan_phb+0x280/0x3d0 pcibios_init+0x88/0x12c do_one_initcall+0x60/0x320 kernel_init_freeable+0x344/0x3e4 kernel_init+0x34/0x1d0 ret_from_kernel_user_thread+0x14/0x1c

Published
May 30, 2024
Updated
Jun 17, 2026
EPSS
0.2% · 15th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • b9f08b2649dddd4eb0698cb428b173bb01dd2fc5, 58942f672c6d04b6a3cd7866cb459671df881538, 6.0affected
    • b1fc44eaa9ba31e28c4125d6b9205a3582b47b5d and later · before 7fb5793c53f8c024e3eae9f0d44eb659aed833c4affected · git
    • b1fc44eaa9ba31e28c4125d6b9205a3582b47b5d and later · before 802b13b79ab1fef66c6852fc745cf197dca0cb15affected · git
    • b1fc44eaa9ba31e28c4125d6b9205a3582b47b5d and later · before 2bed905a72485a2b79a001bd7e66c750942d2155affected · git
    • b1fc44eaa9ba31e28c4125d6b9205a3582b47b5d and later · before 49a940dbdc3107fecd5e6d3063dc07128177e058affected · git
    • 5.18.18 and later · before 5.19affected · semver
    • 5.19.2 and later · before 5.20affected · semver
    • before 6.0not affected · semver
    • 6.1.91 and later · up to and including 6.1.*not affected · semver
    • 6.6.31 and later · up to and including 6.6.*not affected · semver

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel6.0 and later · before 6.1.91
  • linux linux kernel6.2 and later · before 6.6.31
  • linux linux kernel6.7 and later · before 6.8.10

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.94-16.1.94-1
Debian:13linuxbefore 6.8.11-16.8.11-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe…KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2024-36924May 30, 2024 · scsi: lpfc: Release hbalock before calling lpfc_worker_wake_up()
    22Monitor
  • ← EarlierCVE-2024-36925May 30, 2024 · swiotlb: initialise restricted pool list_head when SWIOTLB_DYNAMIC=y
    22Monitor
  • Later →CVE-2024-36928May 30, 2024 · s390/qeth: Fix kernel panic after setting hsuid
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux2bed905a72485a2b79a001bd7e66c750942d2155Vendor (CNA)
Linux Linux49a940dbdc3107fecd5e6d3063dc07128177e058Vendor (CNA)
Linux Linux5.19Vendor (CNA)
Linux Linux5.20Vendor (CNA)
Linux Linux7fb5793c53f8c024e3eae9f0d44eb659aed833c4Vendor (CNA)
Linux Linux802b13b79ab1fef66c6852fc745cf197dca0cb15Vendor (CNA)
azl3 kernel 6.6.29.1-5 on Azure Linux 3.06.6.35.1-4 · CBL-Mariner ReleasesMicrosoft (MSRC)
azl3 kernel 6.6.35.1-4 on Azure Linux 3.06.6.35.1-4 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.94-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-476 · NULL Pointer Dereference

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Show all references (3 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records