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CVE-2022-48757— net: fix information leakage in /proc/net/ptype

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 net 模块 /proc/net/ptype 中的信息泄漏。

AI Predicted 5.3 Difficulty: Easy EPSS 0.22% · P12

Possible ATT&CK Techniques 1 AI

T1005 · Data from Local System

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux 2feb27dbe00cbb4f7d31f90acf6bd0d751dd0a50< 8f88c78d24f6f346919007cd459fd7e51a8c7779 affected
2feb27dbe00cbb4f7d31f90acf6bd0d751dd0a50< be1ca30331c7923c6f376610c1bd6059be9b1908 affected
2feb27dbe00cbb4f7d31f90acf6bd0d751dd0a50< c38023032a598ec6263e008d62c7f02def72d5c7 affected
2feb27dbe00cbb4f7d31f90acf6bd0d751dd0a50< b67ad6170c0ea87391bb253f35d1f78857736e54 affected
2feb27dbe00cbb4f7d31f90acf6bd0d751dd0a50< e372ecd455b6ebc7720f52bf4b5f5d44d02f2092 affected
2feb27dbe00cbb4f7d31f90acf6bd0d751dd0a50< db044d97460ea792110eb8b971e82569ded536c6 affected
2feb27dbe00cbb4f7d31f90acf6bd0d751dd0a50< e43669c77cb3a742b7d84ecdc7c68c4167a7709b affected
2feb27dbe00cbb4f7d31f90acf6bd0d751dd0a50< 839ec7039513a4f84bfbaff953a9393471176bee affected
… +12 more rows
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I. Basic Information for CVE-2022-48757

Vulnerability Information
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Vulnerability Title
net: fix information leakage in /proc/net/ptype
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: fix information leakage in /proc/net/ptype In one net namespace, after creating a packet socket without binding it to a device, users in other net namespaces can observe the new `packet_type` added by this packet socket by reading `/proc/net/ptype` file. This is minor information leakage as packet socket is namespace aware. Add a net pointer in `packet_type` to keep the net namespace of of corresponding packet socket. In `ptype_seq_show`, this net pointer must be checked when it is not NULL.
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 net 模块 /proc/net/ptype 中的信息泄漏。
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 2feb27dbe00cbb4f7d31f90acf6bd0d751dd0a50 ~ 8f88c78d24f6f346919007cd459fd7e51a8c7779 -
Linux Linux 2.6.26 -

II. Public POCs for CVE-2022-48757

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III. Intelligence Information for CVE-2022-48757

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Other References for CVE-2022-48757 (8)

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-2022-48751 7.8 HIGH net/smc: Transitional solution for clcsock race issue
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-2022-48759 7.8 HIGH rpmsg: char: Fix race between the release of rpmsg_ctrldev and cdev
CVE-2022-48729 7.8 HIGH IB/hfi1: Fix panic with larger ipoib send_queue_size
CVE-2022-48733 7.8 HIGH btrfs: fix use-after-free after failure to create a snapshot
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-2022-48754 7.8 HIGH phylib: fix potential use-after-free
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-2022-48757

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