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Review reviewHigh

CVE-2024-41096

Linux Linux, debian linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: PCI/MSI: Fix UAF in msi_capability_init KFENCE reports the following UAF: BUG: KFENCE: use-after-free read in __pci_enable_msi_range+0x2c0/0x488 Use-after-free read at 0x0000000024629571 (in kfence-#12): __pci_enable_msi_range+0x2c0/0x488 pci_alloc_irq_vectors_affinity+0xec/0x14c pci_alloc_irq_vectors+0x18/0x28 kfence-#12: 0x0000000008614900-0x00000000e06c228d, size=104, cache=kmalloc-128 allocated by task 81 on cpu 7 at 10.808142s: __kmem_cache_alloc_node+0x1f0/0x2bc kmalloc_trace+0x44/0x138 msi_alloc_desc+0x3c/0x9c msi_do...

CVSS
7.8
EPSS
0.24%
15.1% percentile
CISA KEV
Not listed
Published
2024.07.30
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.24%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: PCI/MSI: Fix UAF in msi_capability_init KFENCE reports the following UAF: BUG: KFENCE: use-after-free read in __pci_enable_msi_range+0x2c0/0x488 Use-after-free read at 0x0000000024629571 (in kfence-#12): __pci_enable_msi_range+0x2c0/0x488 pci_alloc_irq_vectors_affinity+0xec/0x14c pci_alloc_irq_vectors+0x18/0x28 kfence-#12: 0x0000000008614900-0x00000000e06c228d, size=104, cache=kmalloc-128 allocated by task 81 on cpu 7 at 10.808142s: __kmem_cache_alloc_node+0x1f0/0x2bc kmalloc_trace+0x44/0x138 msi_alloc_desc+0x3c/0x9c msi_do...

Affected product and versions

Product
Linux Linux, debian linux, linux kernel
Affected versions
>= bf6e054e0e3fbc9614355b760e18c8a14f952a4e < 0ae40b2d0a5de6b045504098e365d4fdff5bbeba, >= bf6e054e0e3fbc9614355b760e18c8a14f952a4e < ff1121d2214b794dc1772081f27bdd90721a84bc, >= bf6e054e0e3fbc9614355b760e18c8a14f952a4e < 45fc8d20e0768ab0a0ad054081d0f68aa3c83976, >= bf6e054e0e3fbc9614355b760e18c8a14f952a4e < 9eee5330656bf92f51cb1f09b2dc9f8cf975b3d1, >= 5.17, 11.0, >= 5.17 < 6.1.109, >= 6.2 < 6.6.37, >= 6.7 < 6.9.8
Fixed versions
6.1.109, 6.6.37, 6.9.8

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, debian linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-416