CVE-2026-46212— batman-adv: bla: prevent use-after-free when deleting claims
Possible ATT&CK Techniques 1AI
T1068 · Exploitation for Privilege EscalationAffected Version Matrix 12
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 23721387c409087fd3b97e274f34d3ddc0970b74< 368449e467d5f1e2c2e987bf2bd57000ba75e10b | affected |
23721387c409087fd3b97e274f34d3ddc0970b74< 6c5dc6d68e6ba7f0224a757a39ed52fcdb54d472 | affected | ||
23721387c409087fd3b97e274f34d3ddc0970b74< 00155f336a5e8b1006d2ca9ae7ad8fc4a44bb401 | affected | ||
23721387c409087fd3b97e274f34d3ddc0970b74< 0cc9847c64cb6e61118bc78c9187c8209a7197fa | affected | ||
23721387c409087fd3b97e274f34d3ddc0970b74< 4ae1709a314060a196981b344610d023ea841e57 | affected | ||
3.5 | affected | ||
< 3.5 | unaffected | ||
6.6.140≤ 6.6.* | unaffected | ||
| … +4 more rows | |||
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I. Basic Information for CVE-2026-46212
Vulnerability Information
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Vulnerability Title
batman-adv: bla: prevent use-after-free when deleting claims
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: batman-adv: bla: prevent use-after-free when deleting claims When batadv_bla_del_backbone_claims() removes all claims for a backbone, it does this by dropping the link entry in the hash list. This list entry itself was one of the references which need to be dropped at the same time via batadv_claim_put(). But the batadv_claim_put() must not be done before the last access to the claim object in this function. Otherwise the claim might be freed already by the batadv_claim_release() function before the list entry was dropped.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/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batman-adv模块中删除声明时未正确处理引用计数，可能导致释放后重用。
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-2026-46212
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-46212 (5)
Same Patch Batch · Linux · 2026-05-28 · 138 CVEs total
| CVE-2026-46135 | 9.8 CRITICAL | nvmet-tcp: fix race between ICReq handling and queue teardown |
| CVE-2026-46137 | 9.8 CRITICAL | mptcp: pm: ADD_ADDR rtx: fix potential data-race |
| CVE-2026-46195 | 9.8 CRITICAL | smb: client: validate dacloffset before building DACL pointers |
| CVE-2026-46115 | 9.8 CRITICAL | block: add pgmap check to biovec_phys_mergeable |
| CVE-2026-46185 | 9.1 CRITICAL | smb/client: fix out-of-bounds read in symlink_data() |
| CVE-2026-46119 | 9.1 CRITICAL | libceph: Fix slab-out-of-bounds access in auth message processing |
| CVE-2026-46155 | 9.1 CRITICAL | smb/client: fix out-of-bounds read in smb2_compound_op() |
| CVE-2026-46166 | 8.8 HIGH | wifi: mac80211: use safe list iteration in radar detect work |
| CVE-2026-46198 | 8.8 HIGH | batman-adv: fix integer overflow on buff_pos |
| CVE-2026-46125 | 8.8 HIGH | wifi: mac80211: remove station if connection prep fails |
| CVE-2026-46238 | 8.8 HIGH | batman-adv: stop caching unowned originator pointers in BAT IV |
| CVE-2026-46174 | 8.8 HIGH | x86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache |
| CVE-2026-46113 | 8.8 HIGH | KVM: x86: Fix shadow paging use-after-free due to unexpected GFN |
| CVE-2026-46152 | 8.8 HIGH | wifi: mac80211: drop stray 'static' from fast-RX rx_result |
| CVE-2026-46232 | 8.1 HIGH | HID: playstation: Clamp num_touch_reports |
| CVE-2026-46138 | 8.1 HIGH | Bluetooth: hci_event: Fix OOB read and infinite loop in hci_le_create_big_complete_evt |
| CVE-2026-46209 | 7.8 HIGH | drm/gem: Fix inconsistent plane dimension calculation in drm_gem_fb_init_with_funcs() |
| CVE-2026-46227 | 7.8 HIGH | sctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL |
| CVE-2026-46210 | 7.8 HIGH | media: iris: fix use-after-free of fmt_src during MBPF check |
| CVE-2026-46208 | 7.8 HIGH | batman-adv: stop tp_meter sessions during mesh teardown |
Showing top 20 of 138 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-46242
eventpoll: fix ep_remove struct eventpoll / struct file UAF - CVE-2026-46241
spi: mpc52xx: fix use-after-free on registration failure - CVE-2026-46239
media: i2c: ov5647: Fix runtime PM refcount leak in s_ctrl - CVE-2026-46240
media: iris: Fix use-after-free in iris_release_internal_buf - CVE-2026-46238
batman-adv: stop caching unowned originator pointers in BAT
Same vendor: Linux
- CVE-2026-46242
eventpoll: fix ep_remove struct eventpoll / struct file UAF - CVE-2026-46241
spi: mpc52xx: fix use-after-free on registration failure - CVE-2026-46239
media: i2c: ov5647: Fix runtime PM refcount leak in s_ctrl - CVE-2026-46240
media: iris: Fix use-after-free in iris_release_internal_buf - CVE-2026-46238
batman-adv: stop caching unowned originator pointers in BAT
V. Comments for CVE-2026-46212
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