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CVE-2022-49920— netfilter: nf_tables: netlink notifier might race to release objects

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nf_tables netlink通知器竞态条件释放对象，可能导致释放后重用。

CVSS 7.8 · High EPSS 0.15% · P4

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux 6001a930ce0378b62210d4f83583fc88a903d89d< 1ffe7100411a8b9015115ce124cd6c9c9da6f8e3 affected
6001a930ce0378b62210d4f83583fc88a903d89d< e40b7c44d19e327ad8b49a491ef1fa8dcc4566e0 affected
6001a930ce0378b62210d4f83583fc88a903d89d< d4bc8271db21ea9f1c86a1ca4d64999f184d4aae affected
5.12 affected
< 5.12 unaffected
5.15.78≤ 5.15.* unaffected
6.0.8≤ 6.0.* unaffected
6.1≤ * unaffected
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I. Basic Information for CVE-2022-49920

Vulnerability Information
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Vulnerability Title
netfilter: nf_tables: netlink notifier might race to release objects
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: netlink notifier might race to release objects commit release path is invoked via call_rcu and it runs lockless to release the objects after rcu grace period. The netlink notifier handler might win race to remove objects that the transaction context is still referencing from the commit release path. Call rcu_barrier() to ensure pending rcu callbacks run to completion if the list of transactions to be destroyed is not empty.
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nf_tables netlink通知器竞态条件释放对象，可能导致释放后重用。
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 6001a930ce0378b62210d4f83583fc88a903d89d ~ 1ffe7100411a8b9015115ce124cd6c9c9da6f8e3 -
Linux Linux 5.12 -

II. Public POCs for CVE-2022-49920

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III. Intelligence Information for CVE-2022-49920

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Patches & Fixes for CVE-2022-49920 (3)

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

CVE-2025-37750 9.8 CRITICAL smb: client: fix UAF in decryption with multichannel
CVE-2025-37778 9.8 CRITICAL ksmbd: Fix dangling pointer in krb_authenticate
CVE-2022-49770 9.8 CRITICAL ceph: avoid putting the realm twice when decoding snaps fails
CVE-2022-49931 8.8 HIGH IB/hfi1: Correctly move list in sc_disable()
CVE-2025-37776 8.8 HIGH ksmbd: fix use-after-free in smb_break_all_levII_oplock()
CVE-2025-37777 8.8 HIGH ksmbd: fix use-after-free in __smb2_lease_break_noti()
CVE-2025-37790 8.8 HIGH net: mctp: Set SOCK_RCU_FREE
CVE-2022-49910 8.8 HIGH Bluetooth: L2CAP: Fix use-after-free caused by l2cap_reassemble_sdu
CVE-2022-49886 8.4 HIGH x86/tdx: Panic on bad configs that #VE on "private" memory access
CVE-2025-23159 8.4 HIGH media: venus: hfi: add a check to handle OOB in sfr region
CVE-2025-37749 8.2 HIGH net: ppp: Add bound checking for skb data on ppp_sync_txmung
CVE-2025-37765 7.8 HIGH drm/nouveau: prime: fix ttm_bo_delayed_delete oops
CVE-2022-49905 7.8 HIGH net/smc: Fix possible leaked pernet namespace in smc_init()
CVE-2025-37779 7.8 HIGH lib/iov_iter: fix to increase non slab folio refcount
CVE-2022-49919 7.8 HIGH netfilter: nf_tables: release flow rule object from commit path
CVE-2022-49921 7.8 HIGH net: sched: Fix use after free in red_enqueue()
CVE-2025-37752 7.8 HIGH net_sched: sch_sfq: move the limit validation
CVE-2025-37756 7.8 HIGH net: tls: explicitly disallow disconnect
CVE-2025-37761 7.8 HIGH drm/xe: Fix an out-of-bounds shift when invalidating TLB
CVE-2025-23141 7.8 HIGH KVM: x86: Acquire SRCU in KVM_GET_MP_STATE to protect guest memory accesses

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-2022-49920

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