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CVE-2022-48977— can: af_can: fix NULL pointer dereference in can_rcv_filter

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can子系统af_can中的空指针取消引用问题。

AI Predicted 7.8 Difficulty: Moderate EPSS 0.24% · P16

Possible ATT&CK Techniques 1 AI

T1135 · Network Share Discovery

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux 4ac1feff6ea6495cbfd336f4438a6c6d140544a6< 3982652957e8d79ac32efcb725450580650a8644 affected
1a5751d58b14195f763b8c1d9ef33fb8a93e95e7< c42221efb1159d6a3c89e96685ee38acdce86b6f affected
4e096a18867a5a989b510f6999d9c6b6622e8f7b< c142cba37de29f740a3852f01f59876af8ae462a affected
4e096a18867a5a989b510f6999d9c6b6622e8f7b< fcc63f2f7ee3038d53216edd0d8291e57c752557 affected
4e096a18867a5a989b510f6999d9c6b6622e8f7b< 0acc442309a0a1b01bcdaa135e56e6398a49439c affected
96340078d50a54f6a1252c62596bc44321c8bff9 affected
5.4.110< 5.4.227 affected
5.10.28< 5.10.159 affected
… +8 more rows
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I. Basic Information for CVE-2022-48977

Vulnerability Information
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Vulnerability Title
can: af_can: fix NULL pointer dereference in can_rcv_filter
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: can: af_can: fix NULL pointer dereference in can_rcv_filter Analogue to commit 8aa59e355949 ("can: af_can: fix NULL pointer dereference in can_rx_register()") we need to check for a missing initialization of ml_priv in the receive path of CAN frames. Since commit 4e096a18867a ("net: introduce CAN specific pointer in the struct net_device") the check for dev->type to be ARPHRD_CAN is not sufficient anymore since bonding or tun netdevices claim to be CAN devices but do not initialize ml_priv accordingly.
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can子系统af_can中的空指针取消引用问题。
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 4ac1feff6ea6495cbfd336f4438a6c6d140544a6 ~ 3982652957e8d79ac32efcb725450580650a8644 -
Linux Linux 5.12 -

II. Public POCs for CVE-2022-48977

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III. Intelligence Information for CVE-2022-48977

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Patches & Fixes for CVE-2022-48977 (4)

Same Patch Batch · Linux · 2024-10-21 · 372 CVEs total

CVE-2024-50033 9.8 CRITICAL slip: make slhc_remember() more robust against malicious packets
CVE-2024-49855 9.8 CRITICAL nbd: fix race between timeout and normal completion
CVE-2024-47695 9.8 CRITICAL RDMA/rtrs-clt: Reset cid to con_num - 1 to stay in bounds
CVE-2022-48985 9.8 CRITICAL net: mana: Fix race on per-CQ variable napi work_done
CVE-2022-49003 9.8 CRITICAL nvme: fix SRCU protection of nvme_ns_head list
CVE-2024-50043 9.8 CRITICAL nfsd: fix possible badness in FREE_STATEID
CVE-2024-50047 9.8 CRITICAL smb: client: fix UAF in async decryption
CVE-2024-50046 9.8 CRITICAL NFSv4: Prevent NULL-pointer dereference in nfs42_complete_copies()
CVE-2024-49996 9.4 CRITICAL cifs: Fix buffer overflow when parsing NFS reparse points
CVE-2024-47678 9.4 CRITICAL icmp: change the order of rate limits
CVE-2022-48962 8.8 HIGH net: hisilicon: Fix potential use-after-free in hisi_femac_rx()
CVE-2024-49950 8.8 HIGH Bluetooth: L2CAP: Fix uaf in l2cap_connect
CVE-2024-49939 8.8 HIGH wifi: rtw89: avoid to add interface to list twice when SER
CVE-2022-48967 8.8 HIGH NFC: nci: Bounds check struct nfc_target arrays
CVE-2022-48964 8.8 HIGH ravb: Fix potential use-after-free in ravb_rx_gbeth()
CVE-2024-50029 8.8 HIGH Bluetooth: hci_conn: Fix UAF in hci_enhanced_setup_sync
CVE-2024-49930 8.8 HIGH wifi: ath11k: fix array out-of-bound access in SoC stats
CVE-2024-50041 8.8 HIGH i40e: Fix macvlan leak by synchronizing access to mac_filter_hash
CVE-2024-49936 8.8 HIGH net/xen-netback: prevent UAF in xenvif_flush_hash()
CVE-2022-48954 8.8 HIGH s390/qeth: fix use-after-free in hsci

Showing top 20 of 372 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2022-48977

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