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CVE-2024-46744— Squashfs: sanity check symbolic link size

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，该漏洞源于未正确验证链接大小，可能导致未初始化的内存访问。

AI Predicted 5.5 Difficulty: Hard EPSS 0.30% · P21

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 6545b246a2c815a8fcd07d58240effb6ec3481b1< f82cb7f24032ed023fc67d26ea9bf322d8431a90 affected
6545b246a2c815a8fcd07d58240effb6ec3481b1< 1b9451ba6f21478a75288ea3e3fca4be35e2a438 affected
6545b246a2c815a8fcd07d58240effb6ec3481b1< 5c8906de98d0d7ad42ff3edf2cb6cd7e0ea658c4 affected
6545b246a2c815a8fcd07d58240effb6ec3481b1< 087f25b2d36adae19951114ffcbb7106ed405ebb affected
6545b246a2c815a8fcd07d58240effb6ec3481b1< fac5e82ab1334fc8ed6ff7183702df634bd1d93d affected
6545b246a2c815a8fcd07d58240effb6ec3481b1< c3af7e460a526007e4bed1ce3623274a1a6afe5e affected
6545b246a2c815a8fcd07d58240effb6ec3481b1< ef4e249971eb77ec33d74c5c3de1e2576faf6c90 affected
6545b246a2c815a8fcd07d58240effb6ec3481b1< 810ee43d9cd245d138a2733d87a24858a23f577d affected
… +10 more rows
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I. Basic Information for CVE-2024-46744

Vulnerability Information
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Vulnerability Title
Squashfs: sanity check symbolic link size
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: Squashfs: sanity check symbolic link size Syzkiller reports a "KMSAN: uninit-value in pick_link" bug. This is caused by an uninitialised page, which is ultimately caused by a corrupted symbolic link size read from disk. The reason why the corrupted symlink size causes an uninitialised page is due to the following sequence of events: 1. squashfs_read_inode() is called to read the symbolic link from disk. This assigns the corrupted value 3875536935 to inode->i_size. 2. Later squashfs_symlink_read_folio() is called, which assigns this corrupted value to the length variable, which being a signed int, overflows producing a negative number. 3. The following loop that fills in the page contents checks that the copied bytes is less than length, which being negative means the loop is skipped, producing an uninitialised page. This patch adds a sanity check which checks that the symbolic link size is not larger than expected. -- V2: fix spelling mistake.
Source: CVE Program / CVE List V5
CVSS Information
N/A
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，该漏洞源于未正确验证链接大小，可能导致未初始化的内存访问。
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 6545b246a2c815a8fcd07d58240effb6ec3481b1 ~ f82cb7f24032ed023fc67d26ea9bf322d8431a90 -
Linux Linux 2.6.29 -

II. Public POCs for CVE-2024-46744

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III. Intelligence Information for CVE-2024-46744

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Patches & Fixes for CVE-2024-46744 (3)

Same Patch Batch · Linux · 2024-09-18 · 85 CVEs total

CVE-2024-46717 9.8 CRITICAL net/mlx5e: SHAMPO, Fix incorrect page release
CVE-2024-46736 9.8 CRITICAL smb: client: fix double put of @cfile in smb2_rename_path()
CVE-2024-46796 9.8 CRITICAL smb: client: fix double put of @cfile in smb2_set_path_size()
CVE-2024-46755 8.8 HIGH wifi: mwifiex: Do not return unused priv in mwifiex_get_priv_by_id()
CVE-2024-46780 7.8 HIGH nilfs2: protect references to superblock parameters exposed in sysfs
CVE-2024-46792 7.8 HIGH riscv: misaligned: Restrict user access to kernel memory
CVE-2024-46787 7.8 HIGH userfaultfd: fix checks for huge PMDs
CVE-2024-46734 7.8 HIGH btrfs: fix race between direct IO write and fsync when using same fd
CVE-2024-46738 7.8 HIGH VMCI: Fix use-after-free when removing resource in vmci_resource_remove()
CVE-2024-46740 7.8 HIGH binder: fix UAF caused by offsets overwrite
CVE-2024-46746 7.8 HIGH HID: amd_sfh: free driver_data after destroying hid device
CVE-2024-46781 7.8 HIGH nilfs2: fix missing cleanup on rollforward recovery error
CVE-2024-46750 7.8 HIGH PCI: Add missing bridge lock to pci_bus_lock()
CVE-2024-46741 7.8 HIGH misc: fastrpc: Fix double free of 'buf' in error path
CVE-2024-46751 7.8 HIGH btrfs: don't BUG_ON() when 0 reference count at btrfs_lookup_extent_info()
CVE-2024-46754 7.8 HIGH bpf: Remove tst_run from lwt_seg6local_prog_ops.
CVE-2024-46777 7.8 HIGH udf: Avoid excessive partition lengths
CVE-2024-46762 7.8 HIGH xen: privcmd: Fix possible access to a freed kirqfd instance
CVE-2024-46765 7.8 HIGH ice: protect XDP configuration with a mutex
CVE-2024-46771 7.8 HIGH can: bcm: Remove proc entry when dev is unregistered.

Showing top 20 of 85 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-46744

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