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CVE-2022-49926— net: dsa: Fix possible memory leaks in dsa_loop_init()

AI Predicted 5.5 Difficulty: Theoretical EPSS 0.15% · P4

Affected Version Matrix 16

VendorProductVersion RangeStatus
LinuxLinux98cd1552ea27e512c7e99e2aa76042a26e4fb25c< 935b4beb724946a37cebf97191592d4879d3a3a3affected
98cd1552ea27e512c7e99e2aa76042a26e4fb25c< d593e1ede655b74c42e4e4fe285ea64aee96fb5caffected
98cd1552ea27e512c7e99e2aa76042a26e4fb25c< bbc5d7b46a729bfcbb5544f6612b7a67dd4f4d6faffected
98cd1552ea27e512c7e99e2aa76042a26e4fb25c< 37a098fc9b42bd7fce66764866aa514639667b6eaffected
98cd1552ea27e512c7e99e2aa76042a26e4fb25c< 9f555b1584fc2d5d16ee3c4d9438e93ac7c502c7affected
98cd1552ea27e512c7e99e2aa76042a26e4fb25c< 4d2024b138d9f7b02ae13ee997fd3a71e9e46254affected
98cd1552ea27e512c7e99e2aa76042a26e4fb25c< 633efc8b3dc96f56f5a57f2a49764853a2fa3f50affected
4.12affected
… +8 more rows
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I. Basic Information for CVE-2022-49926

Vulnerability Information
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Vulnerability Title
net: dsa: Fix possible memory leaks in dsa_loop_init()
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: dsa: Fix possible memory leaks in dsa_loop_init() kmemleak reported memory leaks in dsa_loop_init(): kmemleak: 12 new suspected memory leaks unreferenced object 0xffff8880138ce000 (size 2048): comm "modprobe", pid 390, jiffies 4295040478 (age 238.976s) backtrace: [<000000006a94f1d5>] kmalloc_trace+0x26/0x60 [<00000000a9c44622>] phy_device_create+0x5d/0x970 [<00000000d0ee2afc>] get_phy_device+0xf3/0x2b0 [<00000000dca0c71f>] __fixed_phy_register.part.0+0x92/0x4e0 [<000000008a834798>] fixed_phy_register+0x84/0xb0 [<0000000055223fcb>] dsa_loop_init+0xa9/0x116 [dsa_loop] ... There are two reasons for memleak in dsa_loop_init(). First, fixed_phy_register() create and register phy_device: fixed_phy_register() get_phy_device() phy_device_create() # freed by phy_device_free() phy_device_register() # freed by phy_device_remove() But fixed_phy_unregister() only calls phy_device_remove(). So the memory allocated in phy_device_create() is leaked. Second, when mdio_driver_register() fail in dsa_loop_init(), it just returns and there is no cleanup for phydevs. Fix the problems by catching the error of mdio_driver_register() in dsa_loop_init(), then calling both fixed_phy_unregister() and phy_device_free() to release phydevs. Also add a function for phydevs cleanup to avoid duplacate.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
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dsa_loop_init内存泄漏，可能导致资源耗尽。
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux 98cd1552ea27e512c7e99e2aa76042a26e4fb25c ~ 935b4beb724946a37cebf97191592d4879d3a3a3 -
LinuxLinux 4.12 -

II. Public POCs for CVE-2022-49926

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III. Intelligence Information for CVE-2022-49926

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Patches & Fixes for CVE-2022-49926 (7)

Same Patch Batch · Linux · 2025-05-01 · 245 CVEs total

CVE-2022-49852riscv: process: fix kernel info leakage
CVE-2022-49836siox: fix possible memory leak in siox_device_add()
CVE-2022-49837bpf: Fix memory leaks in __check_func_call
CVE-2022-49838sctp: clear out_curr if all frag chunks of current msg are pruned
CVE-2022-49840bpf, test_run: Fix alignment problem in bpf_prog_test_run_skb()
CVE-2022-49839scsi: scsi_transport_sas: Fix error handling in sas_phy_add()
CVE-2022-49841serial: imx: Add missing .thaw_noirq hook
CVE-2022-49842ASoC: core: Fix use-after-free in snd_soc_exit()
CVE-2022-49844can: dev: fix skb drop check
CVE-2022-49845can: j1939: j1939_send_one(): fix missing CAN header initialization
CVE-2022-49846udf: Fix a slab-out-of-bounds write bug in udf_find_entry()
CVE-2022-49847net: ethernet: ti: am65-cpsw: Fix segmentation fault at module unload
CVE-2022-49849btrfs: fix match incorrectly in dev_args_match_device
CVE-2022-49848phy: qcom-qmp-combo: fix NULL-deref on runtime resume
CVE-2022-49850nilfs2: fix deadlock in nilfs_count_free_blocks()
CVE-2022-49851riscv: fix reserved memory setup
CVE-2022-49863can: af_can: fix NULL pointer dereference in can_rx_register()
CVE-2022-49862tipc: fix the msg->req tlv len check in tipc_nl_compat_name_table_dump_header
CVE-2022-49864drm/amdkfd: Fix NULL pointer dereference in svm_migrate_to_ram()
CVE-2022-49861dmaengine: mv_xor_v2: Fix a resource leak in mv_xor_v2_remove()

Showing top 20 of 245 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2022-49926

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