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CVE-2026-52985— netdevsim: zero initialize struct iphdr in dummy sk_buff

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基金会开源的操作系统Linux所使用的内核。 Linux kernel 5.4版本存在安全漏洞，该漏洞源于IP头结构体未初始化，可能导致未初始化值问题。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.12% · P2

Possible ATT&CK Techniques 1 AI

T1564.008 · Email Hiding Rules

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux da58f90f11f597520f226caff1d3cfc115abedc9< 175556c049eaec14efde8c6475e763b7579b9de7 affected
da58f90f11f597520f226caff1d3cfc115abedc9< 6e2cfd0904976e701d7a76b86b694e72af230ab0 affected
da58f90f11f597520f226caff1d3cfc115abedc9< 1b7b6ae0e93b8d512e208b1378d74af052e4f4e7 affected
da58f90f11f597520f226caff1d3cfc115abedc9< 818f7673ed7f4a29d4b9cee8184c47d6e57162b4 affected
da58f90f11f597520f226caff1d3cfc115abedc9< 978ca6ff789f1f19c03288ac20cc1f4774e88490 affected
da58f90f11f597520f226caff1d3cfc115abedc9< 750d0091bebf44975421268d37484ef87060d263 affected
da58f90f11f597520f226caff1d3cfc115abedc9< bc6002865e8c4fcf9e94975f7cf023448d8764e2 affected
da58f90f11f597520f226caff1d3cfc115abedc9< 35eaa6d8d6c2ee65e96f507add856e0eacf24591 affected
… +10 more rows
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I. Basic Information for CVE-2026-52985

Vulnerability Information
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Vulnerability Title
netdevsim: zero initialize struct iphdr in dummy sk_buff
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: netdevsim: zero initialize struct iphdr in dummy sk_buff Syzbot reports a KMSAN uninit-value originating from nsim_dev_trap_skb_build, with the allocation also being performed in the same function. Fix this by calling skb_put_zero instead of skb_put to guarantee zero initialization of the whole IP header.
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 5.4版本存在安全漏洞，该漏洞源于IP头结构体未初始化，可能导致未初始化值问题。
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 da58f90f11f597520f226caff1d3cfc115abedc9 ~ 175556c049eaec14efde8c6475e763b7579b9de7 -
Linux Linux 5.4 -

II. Public POCs for CVE-2026-52985

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III. Intelligence Information for CVE-2026-52985

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Patches & Fixes for CVE-2026-52985 (8)

Same Patch Batch · Linux · 2026-06-24 · 219 CVEs total

CVE-2026-53049 9.8 CRITICAL gfs2: add some missing log locking
CVE-2026-52993 9.8 CRITICAL tipc: fix double-free in tipc_buf_append()
CVE-2026-52989 9.8 CRITICAL nvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callers
CVE-2026-52986 9.8 CRITICAL netfilter: nf_conntrack_sip: don't use simple_strtoul
CVE-2026-52982 9.8 CRITICAL net: usb: rtl8150: fix use-after-free in rtl8150_start_xmit()
CVE-2026-53002 9.8 CRITICAL netfilter: conntrack: remove sprintf usage
CVE-2026-53006 9.8 CRITICAL ipv6: fix possible UAF in icmpv6_rcv()
CVE-2026-53045 9.8 CRITICAL memory: tegra124-emc: Fix dll_change check
CVE-2026-53086 9.8 CRITICAL net: bcmgenet: fix racing timeout handler
CVE-2026-53046 9.8 CRITICAL ksmbd: fix use-after-free from async crypto on Qualcomm crypto engine
CVE-2026-52955 9.8 CRITICAL libceph: Fix potential out-of-bounds access in crush_decode()
CVE-2026-53010 9.8 CRITICAL ksmbd: fix use-after-free in smb2_open during durable reconnect
CVE-2026-53088 9.8 CRITICAL net: bcmgenet: fix off-by-one in bcmgenet_put_txcb
CVE-2026-52914 9.8 CRITICAL batman-adv: fix fragment reassembly length accounting
CVE-2026-53055 9.8 CRITICAL crypto: hisilicon/sec2 - prevent req used-after-free for sec
CVE-2026-52924 9.8 CRITICAL sctp: purge outqueue on stale COOKIE-ECHO handling
CVE-2026-52931 9.8 CRITICAL batman-adv: tp_meter: avoid use of uninit sender vars
CVE-2026-52999 9.1 CRITICAL netfilter: nfnetlink_osf: fix out-of-bounds read on option matching
CVE-2026-53043 9.1 CRITICAL ocfs2/dlm: validate qr_numregions in dlm_match_regions()
CVE-2026-52958 9.1 CRITICAL libceph: Fix potential out-of-bounds access in osdmap_decode()

Showing top 20 of 219 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-52985

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