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CVE-2024-41096— PCI/MSI: Fix UAF in msi_capability_init

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在安全漏洞，该漏洞源于在使用KFENCE时，存在释放后重用错误。

CVSS 7.8 · High EPSS 0.24% · P14

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux bf6e054e0e3fbc9614355b760e18c8a14f952a4e< 0ae40b2d0a5de6b045504098e365d4fdff5bbeba affected
bf6e054e0e3fbc9614355b760e18c8a14f952a4e< ff1121d2214b794dc1772081f27bdd90721a84bc affected
bf6e054e0e3fbc9614355b760e18c8a14f952a4e< 45fc8d20e0768ab0a0ad054081d0f68aa3c83976 affected
bf6e054e0e3fbc9614355b760e18c8a14f952a4e< 9eee5330656bf92f51cb1f09b2dc9f8cf975b3d1 affected
5.17 affected
< 5.17 unaffected
6.1.109≤ 6.1.* unaffected
6.6.37≤ 6.6.* unaffected
… +2 more rows
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I. Basic Information for CVE-2024-41096

Vulnerability Information
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Vulnerability Title
PCI/MSI: Fix UAF in msi_capability_init
Source: CVE Program / CVE List V5
Vulnerability Description
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_domain_insert_msi_desc+0x30/0x78 msi_setup_msi_desc+0x13c/0x184 __pci_enable_msi_range+0x258/0x488 pci_alloc_irq_vectors_affinity+0xec/0x14c pci_alloc_irq_vectors+0x18/0x28 freed by task 81 on cpu 7 at 10.811436s: msi_domain_free_descs+0xd4/0x10c msi_domain_free_locked.part.0+0xc0/0x1d8 msi_domain_alloc_irqs_all_locked+0xb4/0xbc pci_msi_setup_msi_irqs+0x30/0x4c __pci_enable_msi_range+0x2a8/0x488 pci_alloc_irq_vectors_affinity+0xec/0x14c pci_alloc_irq_vectors+0x18/0x28 Descriptor allocation done in: __pci_enable_msi_range msi_capability_init msi_setup_msi_desc msi_insert_msi_desc msi_domain_insert_msi_desc msi_alloc_desc ... Freed in case of failure in __msi_domain_alloc_locked() __pci_enable_msi_range msi_capability_init pci_msi_setup_msi_irqs msi_domain_alloc_irqs_all_locked msi_domain_alloc_locked __msi_domain_alloc_locked => fails msi_domain_free_locked ... That failure propagates back to pci_msi_setup_msi_irqs() in msi_capability_init() which accesses the descriptor for unmasking in the error exit path. Cure it by copying the descriptor and using the copy for the error exit path unmask operation. [ tglx: Massaged change log ]
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在安全漏洞，该漏洞源于在使用KFENCE时，存在释放后重用错误。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux bf6e054e0e3fbc9614355b760e18c8a14f952a4e ~ 0ae40b2d0a5de6b045504098e365d4fdff5bbeba -
Linux Linux 5.17 -

II. Public POCs for CVE-2024-41096

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III. Intelligence Information for CVE-2024-41096

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Patches & Fixes for CVE-2024-41096 (2)

Other References for CVE-2024-41096 (2)

Same Patch Batch · Linux · 2024-07-29 · 121 CVEs total

CVE-2024-41081 9.8 CRITICAL ila: block BH in ila_output()
CVE-2024-41073 9.8 CRITICAL nvme: avoid double free special payload
CVE-2024-41040 9.8 CRITICAL net/sched: Fix UAF when resolving a clash
CVE-2024-41091 8.8 HIGH tun: add missing verification for short frame
CVE-2024-42083 8.8 HIGH ionic: fix kernel panic due to multi-buffer handling
CVE-2024-41062 8.8 HIGH bluetooth/l2cap: sync sock recv cb and release
CVE-2024-41046 8.8 HIGH net: ethernet: lantiq_etop: fix double free in detach
CVE-2024-41090 8.8 HIGH tap: add missing verification for short frame
CVE-2024-41075 7.8 HIGH cachefiles: add consistency check for copen/cread
CVE-2024-41041 7.8 HIGH udp: Set SOCK_RCU_FREE earlier in udp_lib_get_port().
CVE-2024-42066 7.8 HIGH drm/xe: Fix potential integer overflow in page size calculation
CVE-2024-41017 7.8 HIGH jfs: don't walk off the end of ealist
CVE-2024-42067 7.8 HIGH bpf: Take return from set_memory_rox() into account with bpf_jit_binary_lock_ro()
CVE-2024-41049 7.8 HIGH filelock: fix potential use-after-free in posix_lock_inode
CVE-2024-41051 7.8 HIGH cachefiles: wait for ondemand_object_worker to finish when dropping object
CVE-2024-42068 7.8 HIGH bpf: Take return from set_memory_ro() into account with bpf_prog_lock_ro()
CVE-2024-42069 7.8 HIGH net: mana: Fix possible double free in error handling path
CVE-2024-41057 7.8 HIGH cachefiles: fix slab-use-after-free in cachefiles_withdraw_cookie()
CVE-2024-41069 7.8 HIGH ASoC: topology: Fix references to freed memory
CVE-2024-42075 7.8 HIGH bpf: Fix remap of arena.

Showing top 20 of 121 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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