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CVE-2024-35791— KVM: SVM: Flush pages under kvm->lock to fix UAF in svm_register_enc_region()

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，该漏洞源于存在释放后重用。

CVSS 7.8 · High EPSS 0.24% · P14

Affected Version Matrix 19

VendorProduct Version RangeStatus
Linux Linux 4f627ecde7329e476a077bb0590db8f27bb8f912< 2d13b79640b147bd77c34a5998533b2021a4122d affected
19a23da53932bc8011220bd8c410cb76012de004< e126b508ed2e616d679d85fca2fbe77bb48bbdd7 affected
19a23da53932bc8011220bd8c410cb76012de004< 4868c0ecdb6cfde7c70cf478c46e06bb9c7e5865 affected
19a23da53932bc8011220bd8c410cb76012de004< 12f8e32a5a389a5d58afc67728c76e61beee1ad4 affected
19a23da53932bc8011220bd8c410cb76012de004< f6d53d8a2617dd58c89171a6b9610c470ebda38a affected
19a23da53932bc8011220bd8c410cb76012de004< 5ef1d8c1ddbf696e47b226e11888eaf8d9e8e807 affected
f1ecde00ce1694597f923f0d25f7a797c5243d99 affected
848bcb0a1d96f67d075465667d3a1ad4af56311e affected
… +11 more rows
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I. Basic Information for CVE-2024-35791

Vulnerability Information
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Vulnerability Title
KVM: SVM: Flush pages under kvm->lock to fix UAF in svm_register_enc_region()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: KVM: SVM: Flush pages under kvm->lock to fix UAF in svm_register_enc_region() Do the cache flush of converted pages in svm_register_enc_region() before dropping kvm->lock to fix use-after-free issues where region and/or its array of pages could be freed by a different task, e.g. if userspace has __unregister_enc_region_locked() already queued up for the region. Note, the "obvious" alternative of using local variables doesn't fully resolve the bug, as region->pages is also dynamically allocated. I.e. the region structure itself would be fine, but region->pages could be freed. Flushing multiple pages under kvm->lock is unfortunate, but the entire flow is a rare slow path, and the manual flush is only needed on CPUs that lack coherency for encrypted memory.
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，该漏洞源于存在释放后重用。
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 4f627ecde7329e476a077bb0590db8f27bb8f912 ~ 2d13b79640b147bd77c34a5998533b2021a4122d -
Linux Linux 5.11 -

II. Public POCs for CVE-2024-35791

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III. Intelligence Information for CVE-2024-35791

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Mailing List Discussions for CVE-2024-35791 (1)

Other References for CVE-2024-35791 (6)

Same Patch Batch · Linux · 2024-05-17 · 135 CVEs total

CVE-2023-52687 9.8 CRITICAL crypto: safexcel - Add error handling for dma_map_sg() calls
CVE-2024-35856 8.8 HIGH Bluetooth: btusb: mediatek: Fix double free of skb in coredump
CVE-2024-35804 8.8 HIGH KVM: x86: Mark target gfn of emulated atomic instruction as dirty
CVE-2024-35843 8.8 HIGH iommu/vt-d: Use device rbtree in iopf reporting path
CVE-2024-35811 8.8 HIGH wifi: brcmfmac: Fix use-after-free bug in brcmf_cfg80211_detach
CVE-2024-27415 8.8 HIGH netfilter: bridge: confirm multicast packets before passing them up the stack
CVE-2024-27416 8.8 HIGH Bluetooth: hci_event: Fix handling of HCI_EV_IO_CAPA_REQUEST
CVE-2024-27404 8.2 HIGH mptcp: fix data races on remote_id
CVE-2023-52669 8.2 HIGH crypto: s390/aes - Fix buffer overread in CTR mode
CVE-2024-35834 8.2 HIGH xsk: recycle buffer in case Rx queue was full
CVE-2024-35789 8.0 HIGH wifi: mac80211: check/clear fast rx for non-4addr sta VLAN changes
CVE-2024-35830 7.8 HIGH media: tc358743: register v4l2 async device only after successful setup
CVE-2024-35835 7.8 HIGH net/mlx5e: fix a double-free in arfs_create_groups
CVE-2024-35827 7.8 HIGH io_uring/net: fix overflow check in io_recvmsg_mshot_prep()
CVE-2023-52662 7.8 HIGH drm/vmwgfx: fix a memleak in vmw_gmrid_man_get_node
CVE-2024-35817 7.8 HIGH drm/amdgpu: amdgpu_ttm_gart_bind set gtt bound flag
CVE-2024-35808 7.8 HIGH md/dm-raid: don't call md_reap_sync_thread() directly
CVE-2024-35793 7.8 HIGH debugfs: fix wait/cancellation handling during remove
CVE-2024-35798 7.8 HIGH btrfs: fix race in read_extent_buffer_pages()
CVE-2024-35814 7.8 HIGH swiotlb: Fix double-allocation of slots due to broken alignment handling

Showing top 20 of 135 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-35791

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