CVE-2026-43088— net: af_key: zero aligned sockaddr tail in PF_KEY exports
Possible ATT&CK Techniques 1AI
T1005 · Data from Local SystemAffected Version Matrix 12
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 3c19cb8a84ef709d57943bd6664cf31cb91ba6ec | affected |
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 11cbf294bac623bd57296f231199193087f57b4a | affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< edd446ee7cd3d02cac246168063d5b3e9ea68460 | affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 2e74f974359b5382ecbe8536abbb5b837eb6c724 | affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 426c355742f02cf743b347d9d7dbdc1bfbfa31ef | affected | ||
2.6.12 | affected | ||
< 2.6.12 | unaffected | ||
6.6.143≤ 6.6.* | unaffected | ||
| … +4 more rows | |||
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I. Basic Information for CVE-2026-43088
Vulnerability Information
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Vulnerability Title
net: af_key: zero aligned sockaddr tail in PF_KEY exports
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: af_key: zero aligned sockaddr tail in PF_KEY exports PF_KEY export paths use `pfkey_sockaddr_size()` when reserving sockaddr payload space, so IPv6 addresses occupy 32 bytes on the wire. However, `pfkey_sockaddr_fill()` initializes only the first 28 bytes of `struct sockaddr_in6`, leaving the final 4 aligned bytes uninitialized. Not every PF_KEY message is affected. The state and policy dump builders already zero the whole message buffer before filling the sockaddr payloads. Keep the fix to the export paths that still append aligned sockaddr payloads with plain `skb_put()`: - `SADB_ACQUIRE` - `SADB_X_NAT_T_NEW_MAPPING` - `SADB_X_MIGRATE` Fix those paths by clearing only the aligned sockaddr tail after `pfkey_sockaddr_fill()`.
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PF_KEY导出路径中sockaddr_in6结构体最后4字节未初始化，导致信息泄露。
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
II. Public POCs for CVE-2026-43088
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-43088 (5)
Same Patch Batch · Linux · 2026-05-06 · 224 CVEs total
| CVE-2026-43208 | 9.8 CRITICAL | net: do not pass flow_id to set_rps_cpu() |
| CVE-2026-43125 | 9.8 CRITICAL | dlm: validate length in dlm_search_rsb_tree |
| CVE-2026-43198 | 9.8 CRITICAL | tcp: fix potential race in tcp_v6_syn_recv_sock() |
| CVE-2026-43186 | 9.8 CRITICAL | ipv6: ioam: fix heap buffer overflow in __ioam6_fill_trace_data() |
| CVE-2026-43185 | 9.8 CRITICAL | ksmbd: fix signededness bug in smb_direct_prepare_negotiation() |
| CVE-2026-43114 | 9.4 CRITICAL | netfilter: nft_set_pipapo_avx2: don't return non-matching entry on expiry |
| CVE-2026-43117 | 9.1 CRITICAL | btrfs: tracepoints: get correct superblock from dentry in event btrfs_sync_file() |
| CVE-2026-43197 | 9.1 CRITICAL | netconsole: avoid OOB reads, msg is not nul-terminated |
| CVE-2026-43083 | 9.1 CRITICAL | net: ioam6: fix OOB and missing lock |
| CVE-2026-43158 | 8.8 HIGH | xfs: fix freemap adjustments when adding xattrs to leaf blocks |
| CVE-2026-43112 | 8.8 HIGH | fs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath |
| CVE-2026-43113 | 8.8 HIGH | wifi: wl1251: validate packet IDs before indexing tx_frames |
| CVE-2026-43110 | 8.8 HIGH | wifi: brcmfmac: validate bsscfg indices in IF events |
| CVE-2026-43249 | 8.8 HIGH | 9p/xen: protect xen_9pfs_front_free against concurrent calls |
| CVE-2026-43239 | 8.8 HIGH | smb: client: prevent races in ->query_interfaces() |
| CVE-2026-43232 | 8.8 HIGH | net: wan: farsync: Fix use-after-free bugs caused by unfinished tasklets |
| CVE-2026-43283 | 8.8 HIGH | net: ethernet: ec_bhf: Fix dma_free_coherent() dma handle |
| CVE-2026-43172 | 8.8 HIGH | wifi: iwlwifi: fix 22000 series SMEM parsing |
| CVE-2026-43176 | 8.8 HIGH | wifi: rtw89: pci: validate release report content before using for RTL8922DE |
| CVE-2026-43187 | 8.8 HIGH | xfs: delete attr leaf freemap entries when empty |
Showing top 20 of 224 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-2026-43088
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