CVE-2026-53269— netfilter: synproxy: add mutex to guard hook reference counting
Possible ATT&CK Techniques 2AI
T1059 · Command and Scripting Interpreter T1068 · Exploitation for Privilege EscalationAffected Version Matrix 18
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | ad49d86e07a497e834cb06f2b151dccd75f8e148< 0ec9ddc1bda261a2c57636c74c8b4e53000102c9 | affected |
ad49d86e07a497e834cb06f2b151dccd75f8e148< 56ffbe3a08c01dcdb0d6adee9ce1e535bfb3b389 | affected | ||
ad49d86e07a497e834cb06f2b151dccd75f8e148< debc57b83d5b323df74bf010c8d50fe26ad2ed6b | affected | ||
ad49d86e07a497e834cb06f2b151dccd75f8e148< 0f8ba5e4c53d2e4a536aa68140beda9fe59b2f88 | affected | ||
ad49d86e07a497e834cb06f2b151dccd75f8e148< 640441348258220e78daed40528b85b8afcedab6 | affected | ||
ad49d86e07a497e834cb06f2b151dccd75f8e148< aaf80701dc2f7a48fe543961e21f8ca3924d587c | affected | ||
ad49d86e07a497e834cb06f2b151dccd75f8e148< fbf0591275f50eae5733c3d7a8cd6c1e79933ffa | affected | ||
ad49d86e07a497e834cb06f2b151dccd75f8e148< 2fcba19caaeb2a33017459d3430f057967bb91b6 | affected | ||
| … +10 more rows | |||
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I. Basic Information for CVE-2026-53269
Vulnerability Information
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Vulnerability Title
netfilter: synproxy: add mutex to guard hook reference counting
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: synproxy: add mutex to guard hook reference counting As the synproxy infrastructure register netfilter hooks on-demand when a user adds the first iptables target or nftables expression, if done concurrently they can race each other. Introduce a mutex to serialize the refcount control blocks access from both frontends. While a per namespace mutex might be more efficient, it is not needed for target/expression like SYNPROXY.
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基金会开源的操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于synproxy基础设施在添加第一个iptables目标或nftables表达式时并发注册netfilter钩子可能发生竞争，可能导致权限的并发访问问题。以下版本受到影响：5.3版本。
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
II. Public POCs for CVE-2026-53269
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-53269 (8)
Same Patch Batch · Linux · 2026-06-25 · 146 CVEs total
| CVE-2026-53176 | 9.8 CRITICAL | IB/isert: Reject login PDUs shorter than ISER_HEADERS_LEN |
| CVE-2026-53228 | 9.8 CRITICAL | ipv6: sit: reload inner IPv6 header after GSO offloads |
| CVE-2026-53151 | 9.8 CRITICAL | rxrpc: Fix the ACK parser to extract the SACK table for parsing |
| CVE-2026-53221 | 9.8 CRITICAL | ip6_vti: fix incorrect tunnel matching in vti6_tnl_lookup() |
| CVE-2026-53247 | 9.8 CRITICAL | net: ethernet: mtk_eth_soc: Fix use-after-free in metadata dst teardown |
| CVE-2026-53216 | 9.8 CRITICAL | net: mvpp2: limit XDP frame size to the RX buffer |
| CVE-2026-53260 | 9.8 CRITICAL | tcp: Add preempt_{disable,enable}_nested() in reqsk_queue_hash_req(). |
| CVE-2026-53246 | 9.8 CRITICAL | sctp: validate cached peer INIT chunk length in COOKIE_ECHO processing |
| CVE-2026-53175 | 9.8 CRITICAL | inet: frags: fix use-after-free caused by the fqdir_pre_exit() flush |
| CVE-2026-53215 | 9.8 CRITICAL | net: mvpp2: refill RX buffers before XDP or skb use |
| CVE-2026-53131 | 9.4 CRITICAL | netfilter: require Ethernet MAC header before using eth_hdr() |
| CVE-2026-53225 | 9.1 CRITICAL | sctp: fix uninit-value in __sctp_rcv_asconf_lookup() |
| CVE-2026-53224 | 9.1 CRITICAL | sctp: validate embedded INIT chunk and address list lengths in cookie |
| CVE-2026-53186 | 9.1 CRITICAL | RDMA/srp: bound SRP_RSP sense copy by the received length |
| CVE-2026-53240 | 8.8 HIGH | xfrm: iptfs: fix use-after-free on first_skb in __input_process_payload |
| CVE-2026-53171 | 8.8 HIGH | accel/ethosu: fix arithmetic issues in dma_length() |
| CVE-2026-53232 | 8.8 HIGH | net: phy: clean the sfp upstream if phy probing fails |
| CVE-2026-53159 | 8.8 HIGH | misc: fastrpc: fix DMA address corruption due to find_vma misuse |
| CVE-2026-53170 | 8.8 HIGH | accel/ethosu: reject DMA commands with uninitialized length |
| CVE-2026-53188 | 8.8 HIGH | RDMA/core: Validate the passed in fops for ib_get_ucaps() |
Showing top 20 of 146 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-74579
netfilter: nft_payload: fix mask build for partial field off - CVE-2026-74578
crypto: algif_skcipher - force synchronous processing on tre - CVE-2026-74577
net: mpls: initialize rtm_tos in mpls_getroute() - CVE-2026-74576
mm/slab: prevent unbounded recursion in free path with new k - CVE-2026-74574
dmaengine: idxd: fix fdev setup failure cleanup in idxd_cdev
Same vendor: Linux
- CVE-2026-74579
netfilter: nft_payload: fix mask build for partial field off - CVE-2026-74578
crypto: algif_skcipher - force synchronous processing on tre - CVE-2026-74577
net: mpls: initialize rtm_tos in mpls_getroute() - CVE-2026-74576
mm/slab: prevent unbounded recursion in free path with new k - CVE-2026-74574
dmaengine: idxd: fix fdev setup failure cleanup in idxd_cdev
V. Comments for CVE-2026-53269
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