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CVE-2022-49183— net/sched: act_ct: fix ref leak when switching zones

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act_ct模块在切换区域或网络命名空间时未释放旧的ct条目引用，可能导致资源泄露。

AI Predicted 4.3 Difficulty: Trivial EPSS 0.27% · P18

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 15

VendorProduct Version RangeStatus
Linux Linux 0fc1847359964e95e521cf2bb2b10f8e33dd0970< 9222a08be539cbb7a8e0d46cbc7ab9e4db273eb8 affected
a95ea90deb3071c1ded77a05e91cfebc5238d908< bcbf4e5c3b5b373cd61528392dd1ec8e9c0fd33d affected
e9408de00e5ecd0dbe91cf061c7da23711c4febb< 4bb42d73def9411e5cad885b9811987d72431df1 affected
2f131de361f6d0eaff17db26efdb844c178432f8< b24793a37d91aacad7cb9893b226a7924a89636a affected
2f131de361f6d0eaff17db26efdb844c178432f8< bcb74e132a76ce0502bb33d5b65533a4ed72d159 affected
5.10.103< 5.10.258 affected
5.15.26< 5.15.33 affected
5.16.12< 5.16.19 affected
… +7 more rows
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I. Basic Information for CVE-2022-49183

Vulnerability Information
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Vulnerability Title
net/sched: act_ct: fix ref leak when switching zones
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net/sched: act_ct: fix ref leak when switching zones When switching zones or network namespaces without doing a ct clear in between, it is now leaking a reference to the old ct entry. That's because tcf_ct_skb_nfct_cached() returns false and tcf_ct_flow_table_lookup() may simply overwrite it. The fix is to, as the ct entry is not reusable, free it already at tcf_ct_skb_nfct_cached().
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act_ct模块在切换区域或网络命名空间时未释放旧的ct条目引用，可能导致资源泄露。
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 0fc1847359964e95e521cf2bb2b10f8e33dd0970 ~ 9222a08be539cbb7a8e0d46cbc7ab9e4db273eb8 -
Linux Linux 5.17 -

II. Public POCs for CVE-2022-49183

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III. Intelligence Information for CVE-2022-49183

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Patches & Fixes for CVE-2022-49183 (4)

Same Patch Batch · Linux · 2025-02-26 · 706 CVEs total

CVE-2022-49149 9.8 CRITICAL rxrpc: Fix call timer start racing with call destruction
CVE-2022-49280 9.8 CRITICAL NFSD: prevent underflow in nfssvc_decode_writeargs()
CVE-2022-49561 9.8 CRITICAL netfilter: conntrack: re-fetch conntrack after insertion
CVE-2022-49407 9.8 CRITICAL dlm: fix plock invalid read
CVE-2022-49094 9.8 CRITICAL net/tls: fix slab-out-of-bounds bug in decrypt_internal
CVE-2022-49362 9.8 CRITICAL NFSD: Fix potential use-after-free in nfsd_file_put()
CVE-2022-49093 9.8 CRITICAL skbuff: fix coalescing for page_pool fragment recycling
CVE-2022-49194 9.8 CRITICAL net: bcmgenet: Use stronger register read/writes to assure ordering
CVE-2022-49356 9.8 CRITICAL SUNRPC: Trap RDMA segment overflows
CVE-2022-49418 9.8 CRITICAL NFSv4: Fix free of uninitialized nfs4_label on referral lookup.
CVE-2022-49201 9.8 CRITICAL ibmvnic: fix race between xmit and reset
CVE-2022-49260 9.8 CRITICAL crypto: hisilicon/sec - fix the aead software fallback for engine
CVE-2022-49058 9.1 CRITICAL cifs: potential buffer overflow in handling symlinks
CVE-2022-49519 8.8 HIGH ath10k: skip ath10k_halt during suspend for driver state RESTARTING
CVE-2022-49328 8.8 HIGH mt76: fix use-after-free by removing a non-RCU wcid pointer
CVE-2022-49535 8.8 HIGH scsi: lpfc: Fix null pointer dereference after failing to issue FLOGI and PLOGI
CVE-2022-49138 8.8 HIGH Bluetooth: hci_event: Ignore multiple conn complete events
CVE-2022-49479 8.8 HIGH mt76: fix tx status related use-after-free race on station removal
CVE-2022-49114 8.8 HIGH scsi: libfc: Fix use after free in fc_exch_abts_resp()
CVE-2022-49111 8.8 HIGH Bluetooth: Fix use after free in hci_send_acl

Showing top 20 of 706 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2022-49183

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