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CVE-2022-48779— net: mscc: ocelot: fix use-after-free in ocelot_vlan_del()

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:mscc:ocelot模块中发现使用后释放问题。在ocelot_vlan_del函数中，ocelot_vlan_member_del函数会释放struct ocelot_bridge_vlan，但如果这与端口的pvid_vlan相同，则后续访问的是已释放的内存。

CVSS 7.8 · High EPSS 0.22% · P12

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 6

VendorProduct Version RangeStatus
Linux Linux d4004422f6f9fa8e55c04482008c1c9f9edd2d19< c98bed60cdd7f22237ae256cc9c1c3087206b8a2 affected
d4004422f6f9fa8e55c04482008c1c9f9edd2d19< ef57640575406f57f5b3393cf57f457b0ace837e affected
5.16 affected
< 5.16 unaffected
5.16.11≤ 5.16.* unaffected
5.17≤ * unaffected
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I. Basic Information for CVE-2022-48779

Vulnerability Information
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Vulnerability Title
net: mscc: ocelot: fix use-after-free in ocelot_vlan_del()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: mscc: ocelot: fix use-after-free in ocelot_vlan_del() ocelot_vlan_member_del() will free the struct ocelot_bridge_vlan, so if this is the same as the port's pvid_vlan which we access afterwards, what we're accessing is freed memory. Fix the bug by determining whether to clear ocelot_port->pvid_vlan prior to calling ocelot_vlan_member_del().
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net:mscc:ocelot模块中发现使用后释放问题。在ocelot_vlan_del函数中，ocelot_vlan_member_del函数会释放struct ocelot_bridge_vlan，但如果这与端口的pvid_vlan相同，则后续访问的是已释放的内存。
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 d4004422f6f9fa8e55c04482008c1c9f9edd2d19 ~ c98bed60cdd7f22237ae256cc9c1c3087206b8a2 -
Linux Linux 5.16 -

II. Public POCs for CVE-2022-48779

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III. Intelligence Information for CVE-2022-48779

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Other References for CVE-2022-48779 (1)

Same Patch Batch · Linux · 2024-07-16 · 98 CVEs total

CVE-2022-48790 9.8 CRITICAL nvme: fix a possible use-after-free in controller reset during load
CVE-2022-48789 9.8 CRITICAL nvme-tcp: fix possible use-after-free in transport error_recovery work
CVE-2022-48788 9.8 CRITICAL nvme-rdma: fix possible use-after-free in transport error_recovery work
CVE-2022-48851 9.8 CRITICAL staging: gdm724x: fix use after free in gdm_lte_rx()
CVE-2022-48829 9.1 CRITICAL NFSD: Fix NFSv3 SETATTR/CREATE's handling of large file sizes
CVE-2022-48828 9.1 CRITICAL NFSD: Fix ia_size underflow
CVE-2022-48864 8.8 HIGH vdpa/mlx5: add validation for VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET command
CVE-2022-48830 8.8 HIGH can: isotp: fix potential CAN frame reception race in isotp_rcv()
CVE-2022-48782 8.8 HIGH mctp: fix use after free
CVE-2022-48785 8.8 HIGH ipv6: mcast: use rcu-safe version of ipv6_get_lladdr()
CVE-2022-48847 7.8 HIGH watch_queue: Fix filter limit check
CVE-2022-48796 7.8 HIGH iommu: Fix potential use-after-free during probe
CVE-2022-48821 7.8 HIGH misc: fastrpc: avoid double fput() on failed usercopy
CVE-2022-48822 7.8 HIGH usb: f_fs: Fix use-after-free for epfile
CVE-2022-48839 7.8 HIGH net/packet: fix slab-out-of-bounds access in packet_recvmsg()
CVE-2022-48801 7.8 HIGH iio: buffer: Fix file related error handling in IIO_BUFFER_GET_FD_IOCTL
CVE-2022-48792 7.8 HIGH scsi: pm8001: Fix use-after-free for aborted SSP/STP sas_task
CVE-2022-48786 7.8 HIGH vsock: remove vsock from connected table when connect is interrupted by a signal
CVE-2022-48787 7.8 HIGH iwlwifi: fix use-after-free
CVE-2022-48791 7.8 HIGH scsi: pm8001: Fix use-after-free for aborted TMF sas_task

Showing top 20 of 98 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2022-48779

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