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CVE-2022-48747— block: Fix wrong offset in bio_truncate()

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 block 模块 bio_truncate 中的错误偏移量。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.92% · P58

Possible ATT&CK Techniques 1 AI

T1005 · Data from Local System

Affected Version Matrix 13

VendorProduct Version RangeStatus
Linux Linux 943cd69efac437d82a7aea0659fccbcc071730de< 6cbf4c731d7812518cd857c2cfc3da9fd120f6ae affected
85a8ce62c2eabe28b9d76ca4eecf37922402df93< b63e120189fd92aff00096d11e2fc5253f60248b affected
85a8ce62c2eabe28b9d76ca4eecf37922402df93< 4633a79ff8bc82770486a063a08b55e5162521d8 affected
85a8ce62c2eabe28b9d76ca4eecf37922402df93< 941d5180c430ce5b0f7a3622ef9b76077bfa3d82 affected
85a8ce62c2eabe28b9d76ca4eecf37922402df93< 3ee859e384d453d6ac68bfd5971f630d9fa46ad3 affected
5.4.9< 5.4.176 affected
5.5 affected
< 5.5 unaffected
… +5 more rows
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I. Basic Information for CVE-2022-48747

Vulnerability Information
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Vulnerability Title
block: Fix wrong offset in bio_truncate()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: block: Fix wrong offset in bio_truncate() bio_truncate() clears the buffer outside of last block of bdev, however current bio_truncate() is using the wrong offset of page. So it can return the uninitialized data. This happened when both of truncated/corrupted FS and userspace (via bdev) are trying to read the last of bdev.
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 block 模块 bio_truncate 中的错误偏移量。
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 943cd69efac437d82a7aea0659fccbcc071730de ~ 6cbf4c731d7812518cd857c2cfc3da9fd120f6ae -
Linux Linux 5.5 -

II. Public POCs for CVE-2022-48747

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III. Intelligence Information for CVE-2022-48747

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Other References for CVE-2022-48747 (5)

Same Patch Batch · Linux · 2024-06-20 · 67 CVEs total

CVE-2022-48711 9.8 CRITICAL tipc: improve size validations for received domain records
CVE-2024-38620 8.8 HIGH Bluetooth: HCI: Remove HCI_AMP support
CVE-2021-47620 8.1 HIGH Bluetooth: refactor malicious adv data check
CVE-2022-48743 8.1 HIGH net: amd-xgbe: Fix skb data length underflow
CVE-2022-48720 7.8 HIGH net: macsec: Fix offload support for NETDEV_UNREGISTER event
CVE-2022-48759 7.8 HIGH rpmsg: char: Fix race between the release of rpmsg_ctrldev and cdev
CVE-2022-48771 7.8 HIGH drm/vmwgfx: Fix stale file descriptors on failed usercopy
CVE-2022-48716 7.8 HIGH ASoC: codecs: wcd938x: fix incorrect used of portid
CVE-2022-48751 7.8 HIGH net/smc: Transitional solution for clcsock race issue
CVE-2022-48729 7.8 HIGH IB/hfi1: Fix panic with larger ipoib send_queue_size
CVE-2022-48754 7.8 HIGH phylib: fix potential use-after-free
CVE-2022-48742 7.8 HIGH rtnetlink: make sure to refresh master_dev/m_ops in __rtnl_newlink()
CVE-2022-48721 7.8 HIGH net/smc: Forward wakeup to smc socket waitqueue after fallback
CVE-2022-48733 7.8 HIGH btrfs: fix use-after-free after failure to create a snapshot
CVE-2022-48762 7.8 HIGH arm64: extable: fix load_unaligned_zeropad() reg indices
CVE-2022-48735 7.8 HIGH ALSA: hda: Fix UAF of leds class devs at unbinding
CVE-2022-48726 7.8 HIGH RDMA/ucma: Protect mc during concurrent multicast leaves
CVE-2022-48744 7.5 HIGH net/mlx5e: Avoid field-overflowing memcpy()
CVE-2022-48727 7.3 HIGH KVM: arm64: Avoid consuming a stale esr value when SError occur
CVE-2022-48717 7.1 HIGH ASoC: max9759: fix underflow in speaker_gain_control_put()

Showing top 20 of 67 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2022-48747

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