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CVE-2024-35980— arm64: tlb: Fix TLBI RANGE operand

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，该漏洞源于传递给 TLBI RANGE 指令的操作数未正确排序，这会导致实时迁移后目标虚拟机崩溃。

CVSS 8.4 · High EPSS 0.23% · P12

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux 117940aa6e5f8308f1529e1313660980f1dae771< ac4ad513de4fba18b4ac0ace132777d0910e8cfa affected
117940aa6e5f8308f1529e1313660980f1dae771< 944db7b536baaf49d7e576af36a94f4719552b07 affected
117940aa6e5f8308f1529e1313660980f1dae771< e3ba51ab24fddef79fc212f9840de54db8fd1685 affected
6.6 affected
< 6.6 unaffected
6.6.29≤ 6.6.* unaffected
6.8.7≤ 6.8.* unaffected
6.9≤ * unaffected
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I. Basic Information for CVE-2024-35980

Vulnerability Information
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Vulnerability Title
arm64: tlb: Fix TLBI RANGE operand
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: arm64: tlb: Fix TLBI RANGE operand KVM/arm64 relies on TLBI RANGE feature to flush TLBs when the dirty pages are collected by VMM and the page table entries become write protected during live migration. Unfortunately, the operand passed to the TLBI RANGE instruction isn't correctly sorted out due to the commit 117940aa6e5f ("KVM: arm64: Define kvm_tlb_flush_vmid_range()"). It leads to crash on the destination VM after live migration because TLBs aren't flushed completely and some of the dirty pages are missed. For example, I have a VM where 8GB memory is assigned, starting from 0x40000000 (1GB). Note that the host has 4KB as the base page size. In the middile of migration, kvm_tlb_flush_vmid_range() is executed to flush TLBs. It passes MAX_TLBI_RANGE_PAGES as the argument to __kvm_tlb_flush_vmid_range() and __flush_s2_tlb_range_op(). SCALE#3 and NUM#31, corresponding to MAX_TLBI_RANGE_PAGES, isn't supported by __TLBI_RANGE_NUM(). In this specific case, -1 has been returned from __TLBI_RANGE_NUM() for SCALE#3/2/1/0 and rejected by the loop in the __flush_tlb_range_op() until the variable @scale underflows and becomes -9, 0xffff708000040000 is set as the operand. The operand is wrong since it's sorted out by __TLBI_VADDR_RANGE() according to invalid @scale and @num. Fix it by extending __TLBI_RANGE_NUM() to support the combination of SCALE#3 and NUM#31. With the changes, [-1 31] instead of [-1 30] can be returned from the macro, meaning the TLBs for 0x200000 pages in the above example can be flushed in one shoot with SCALE#3 and NUM#31. The macro TLBI_RANGE_MASK is dropped since no one uses it any more. The comments are also adjusted accordingly.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/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，该漏洞源于传递给 TLBI RANGE 指令的操作数未正确排序，这会导致实时迁移后目标虚拟机崩溃。
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 117940aa6e5f8308f1529e1313660980f1dae771 ~ ac4ad513de4fba18b4ac0ace132777d0910e8cfa -
Linux Linux 6.6 -

II. Public POCs for CVE-2024-35980

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III. Intelligence Information for CVE-2024-35980

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Other References for CVE-2024-35980 (3)

Same Patch Batch · Linux · 2024-05-20 · 62 CVEs total

CVE-2024-35969 8.8 HIGH ipv6: fix race condition between ipv6_get_ifaddr and ipv6_del_addr
CVE-2024-35987 8.4 HIGH riscv: Fix loading 64-bit NOMMU kernels past the start of RAM
CVE-2024-35948 7.8 HIGH bcachefs: Check for journal entries overruning end of sb clean section
CVE-2024-36001 7.8 HIGH netfs: Fix the pre-flush when appending to a file in writethrough mode
CVE-2024-36007 7.8 HIGH mlxsw: spectrum_acl_tcam: Fix warning during rehash
CVE-2024-35993 7.8 HIGH mm: turn folio_test_hugetlb into a PageType
CVE-2024-35994 7.8 HIGH firmware: qcom: uefisecapp: Fix memory related IO errors and crashes
CVE-2024-35990 7.8 HIGH dma: xilinx_dpdma: Fix locking
CVE-2024-36009 7.8 HIGH ax25: Fix netdev refcount issue
CVE-2024-35968 7.8 HIGH pds_core: Fix pdsc_check_pci_health function to use work thread
CVE-2024-35958 7.8 HIGH net: ena: Fix incorrect descriptor free behavior
CVE-2024-35954 7.8 HIGH scsi: sg: Avoid sg device teardown race
CVE-2024-35951 7.8 HIGH drm/panfrost: Fix the error path in panfrost_mmu_map_fault_addr()
CVE-2024-35950 7.8 HIGH drm/client: Fully protect modes[] with dev->mode_config.mutex
CVE-2024-35949 7.8 HIGH btrfs: make sure that WRITTEN is set on all metadata blocks
CVE-2024-35979 7.8 HIGH raid1: fix use-after-free for original bio in raid1_write_request()
CVE-2024-35999 7.5 HIGH smb3: missing lock when picking channel
CVE-2024-35971 7.5 HIGH net: ks8851: Handle softirqs at the end of IRQ thread to fix hang
CVE-2024-35998 7.5 HIGH smb3: fix lock ordering potential deadlock in cifs_sync_mid_result
CVE-2024-35976 7.1 HIGH xsk: validate user input for XDP_{UMEM|COMPLETION}_FILL_RING

Showing top 20 of 62 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-35980

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