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

CVSS 7.5 · High EPSS 0.39% · P32

Possible ATT&CK Techniques 1AI

T1211 · Exploitation for Stealth

Affected Version Matrix 18

VendorProductVersion RangeStatus
LinuxLinux785ea1144182c341b8b85b0f8180291839d176a8< 9bcebaedfb8479cb4affb23c7a0d000ca9a20e73affected
785ea1144182c341b8b85b0f8180291839d176a8< 2edb8aeb3cdda9d00ec4997252dc5bcd6f54d8efaffected
785ea1144182c341b8b85b0f8180291839d176a8< ce0c381199402a2c58f4599f4f6ed100d872d0daaffected
785ea1144182c341b8b85b0f8180291839d176a8< 866ac1d57040ed0b44ca732e3c66b3aa6b93011caffected
785ea1144182c341b8b85b0f8180291839d176a8< 4d420d9ee70a220a2cd95aa0dd2e15acad66a505affected
785ea1144182c341b8b85b0f8180291839d176a8< 9cceea8eeba710def2a5707ee00f00c74a9a1cacaffected
785ea1144182c341b8b85b0f8180291839d176a8< cf48e75fc4fe0d5cc7721c82d454221d01367b93affected
785ea1144182c341b8b85b0f8180291839d176a8< 2d8826a2d3657cea66fb0370f9e521575a673871affected
… +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: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux 785ea1144182c341b8b85b0f8180291839d176a8 ~ 9bcebaedfb8479cb4affb23c7a0d000ca9a20e73 -
LinuxLinux 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-2026-530469.8 CRITICALksmbd: fix use-after-free from async crypto on Qualcomm crypto engine
CVE-2026-530889.8 CRITICALnet: bcmgenet: fix off-by-one in bcmgenet_put_txcb
CVE-2026-530109.8 CRITICALksmbd: fix use-after-free in smb2_open during durable reconnect
CVE-2026-530069.8 CRITICALipv6: fix possible UAF in icmpv6_rcv()
CVE-2026-530869.8 CRITICALnet: bcmgenet: fix racing timeout handler
CVE-2026-530029.8 CRITICALnetfilter: conntrack: remove sprintf usage
CVE-2026-529939.8 CRITICALtipc: fix double-free in tipc_buf_append()
CVE-2026-529899.8 CRITICALnvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callers
CVE-2026-529869.8 CRITICALnetfilter: nf_conntrack_sip: don't use simple_strtoul
CVE-2026-529829.8 CRITICALnet: usb: rtl8150: fix use-after-free in rtl8150_start_xmit()
CVE-2026-530459.8 CRITICALmemory: tegra124-emc: Fix dll_change check
CVE-2026-529559.8 CRITICALlibceph: Fix potential out-of-bounds access in crush_decode()
CVE-2026-530499.8 CRITICALgfs2: add some missing log locking
CVE-2026-529149.8 CRITICALbatman-adv: fix fragment reassembly length accounting
CVE-2026-529319.8 CRITICALbatman-adv: tp_meter: avoid use of uninit sender vars
CVE-2026-529249.8 CRITICALsctp: purge outqueue on stale COOKIE-ECHO handling
CVE-2026-530559.8 CRITICALcrypto: hisilicon/sec2 - prevent req used-after-free for sec
CVE-2026-530439.1 CRITICALocfs2/dlm: validate qr_numregions in dlm_match_regions()
CVE-2026-529999.1 CRITICALnetfilter: nfnetlink_osf: fix out-of-bounds read on option matching
CVE-2026-529589.1 CRITICALlibceph: 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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