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CVE-2024-26786— iommufd: Fix iopt_access_list_id overwrite bug

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，该漏洞源于列表中的访问指针与传入的不匹配。

CVSS 7.8 · High EPSS 0.23% · P13

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux 9227da7816dd1a42e20d41e2244cb63c205477ca< f1fb745ee0a6fe43f1d84ec369c7e6af2310fda9 affected
9227da7816dd1a42e20d41e2244cb63c205477ca< 9526a46cc0c378d381560279bea9aa34c84298a0 affected
9227da7816dd1a42e20d41e2244cb63c205477ca< aeb004c0cd6958e910123a1607634401009c9539 affected
6.6 affected
< 6.6 unaffected
6.6.21≤ 6.6.* unaffected
6.7.9≤ 6.7.* unaffected
6.8≤ * unaffected
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I. Basic Information for CVE-2024-26786

Vulnerability Information
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Vulnerability Title
iommufd: Fix iopt_access_list_id overwrite bug
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: iommufd: Fix iopt_access_list_id overwrite bug Syzkaller reported the following WARN_ON: WARNING: CPU: 1 PID: 4738 at drivers/iommu/iommufd/io_pagetable.c:1360 Call Trace: iommufd_access_change_ioas+0x2fe/0x4e0 iommufd_access_destroy_object+0x50/0xb0 iommufd_object_remove+0x2a3/0x490 iommufd_object_destroy_user iommufd_access_destroy+0x71/0xb0 iommufd_test_staccess_release+0x89/0xd0 __fput+0x272/0xb50 __fput_sync+0x4b/0x60 __do_sys_close __se_sys_close __x64_sys_close+0x8b/0x110 do_syscall_x64 The mismatch between the access pointer in the list and the passed-in pointer is resulting from an overwrite of access->iopt_access_list_id, in iopt_add_access(). Called from iommufd_access_change_ioas() when xa_alloc() succeeds but iopt_calculate_iova_alignment() fails. Add a new_id in iopt_add_access() and only update iopt_access_list_id when returning successfully.
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，该漏洞源于列表中的访问指针与传入的不匹配。
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 9227da7816dd1a42e20d41e2244cb63c205477ca ~ f1fb745ee0a6fe43f1d84ec369c7e6af2310fda9 -
Linux Linux 6.6 -

II. Public POCs for CVE-2024-26786

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III. Intelligence Information for CVE-2024-26786

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Other References for CVE-2024-26786 (3)

Same Patch Batch · Linux · 2024-04-04 · 32 CVEs total

CVE-2024-26782 9.8 CRITICAL mptcp: fix double-free on socket dismantle
CVE-2024-26800 9.8 CRITICAL tls: fix use-after-free on failed backlog decryption
CVE-2024-26801 8.8 HIGH Bluetooth: Avoid potential use-after-free in hci_error_reset
CVE-2024-26793 7.8 HIGH gtp: fix use-after-free and null-ptr-deref in gtp_newlink()
CVE-2024-26809 7.8 HIGH netfilter: nft_set_pipapo: release elements in clone only from destroy path
CVE-2024-26808 7.8 HIGH netfilter: nft_chain_filter: handle NETDEV_UNREGISTER for inet/ingress basechain
CVE-2024-26807 7.8 HIGH spi: cadence-qspi: fix pointer reference in runtime PM hooks
CVE-2024-26804 7.8 HIGH net: ip_tunnel: prevent perpetual headroom growth
CVE-2024-26802 7.8 HIGH stmmac: Clear variable when destroying workqueue
CVE-2024-26797 7.8 HIGH drm/amd/display: Prevent potential buffer overflow in map_hw_resources
CVE-2024-26795 7.8 HIGH riscv: Sparse-Memory/vmemmap out-of-bounds fix
CVE-2024-26792 7.8 HIGH btrfs: fix double free of anonymous device after snapshot creation failure
CVE-2024-26789 7.8 HIGH crypto: arm64/neonbs - fix out-of-bounds access on short input
CVE-2024-26799 7.0 HIGH ASoC: qcom: Fix uninitialized pointer dmactl
CVE-2024-26785 iommufd: Fix protection fault in iommufd_test_syz_conv_iova
CVE-2024-26746 dmaengine: idxd: Ensure safe user copy of completion record
CVE-2024-26750 af_unix: Drop oob_skb ref before purging queue in GC.
CVE-2024-26780 af_unix: Fix task hung while purging oob_skb in GC.
CVE-2024-26806 spi: cadence-qspi: remove system-wide suspend helper calls from runtime PM hooks
CVE-2024-26805 netlink: Fix kernel-infoleak-after-free in __skb_datagram_iter

Showing top 20 of 32 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-26786

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