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CVE-2026-52922— batman-adv: dat: handle forward allocation error

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存在安全漏洞，该漏洞源于batman-adv的dat组件中batadv_dat_forward_data()函数调用pskb_copy_for_clone()复制skb时未检查返回值，导致分配失败触发空指针取消引用。以下版本受到影响：3.8版本。

CVSS 7.5 · High EPSS 0.39% · P31

Possible ATT&CK Techniques 1 AI

T1211 · Exploitation for Stealth

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 785ea1144182c341b8b85b0f8180291839d176a8< 9bcebaedfb8479cb4affb23c7a0d000ca9a20e73 affected
785ea1144182c341b8b85b0f8180291839d176a8< 2edb8aeb3cdda9d00ec4997252dc5bcd6f54d8ef affected
785ea1144182c341b8b85b0f8180291839d176a8< ce0c381199402a2c58f4599f4f6ed100d872d0da affected
785ea1144182c341b8b85b0f8180291839d176a8< 866ac1d57040ed0b44ca732e3c66b3aa6b93011c affected
785ea1144182c341b8b85b0f8180291839d176a8< 4d420d9ee70a220a2cd95aa0dd2e15acad66a505 affected
785ea1144182c341b8b85b0f8180291839d176a8< 9cceea8eeba710def2a5707ee00f00c74a9a1cac affected
785ea1144182c341b8b85b0f8180291839d176a8< cf48e75fc4fe0d5cc7721c82d454221d01367b93 affected
785ea1144182c341b8b85b0f8180291839d176a8< 2d8826a2d3657cea66fb0370f9e521575a673871 affected
… +10 more rows
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I. Basic Information for CVE-2026-52922

Vulnerability Information
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Vulnerability Title
batman-adv: dat: handle forward allocation error
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: batman-adv: dat: handle forward allocation error batadv_dat_forward_data() calls pskb_copy_for_clone() to duplicate an skb for each DHT candidate, but does not check the return value before passing it to batadv_send_skb_prepare_unicast_4addr(). That function dereferences the skb unconditionally, so a failed allocation triggers a NULL pointer dereference. Skip forwarding to the current DHT candidate on allocation failure.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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batman-adv的dat组件中batadv_dat_forward_data()函数调用pskb_copy_for_clone()复制skb时未检查返回值，导致分配失败触发空指针取消引用。以下版本受到影响：3.8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

Vendor Product Affected Versions CPE Subscribe
Linux Linux 785ea1144182c341b8b85b0f8180291839d176a8 ~ 9bcebaedfb8479cb4affb23c7a0d000ca9a20e73 -
Linux Linux 3.8 -

II. Public POCs for CVE-2026-52922

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III. Intelligence Information for CVE-2026-52922

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Patches & Fixes for CVE-2026-52922 (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-2026-52922

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