CVE-2026-45951— bpf: Fix a potential use-after-free of BTF object
Possible ATT&CK Techniques 1AI
T1059 · Command and Scripting InterpreterAffected Version Matrix 8
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 76145f7255326761dafb76721a785799d8a00d5f< eac65c272f3b49021a843cba5107d63627395e0e | affected |
76145f7255326761dafb76721a785799d8a00d5f< 9ff46ffeecdb1802d6e26183177935b948a12e7f | affected | ||
76145f7255326761dafb76721a785799d8a00d5f< ccd2d799ed4467c07f5ee18c2f5c59bcc990822c | affected | ||
6.14 | affected | ||
< 6.14 | unaffected | ||
6.18.14≤ 6.18.* | unaffected | ||
6.19.4≤ 6.19.* | unaffected | ||
7.0≤ * | unaffected |
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I. Basic Information for CVE-2026-45951
Vulnerability Information
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Vulnerability Title
bpf: Fix a potential use-after-free of BTF object
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix a potential use-after-free of BTF object Refcounting in the check_pseudo_btf_id() function is incorrect: the __check_pseudo_btf_id() function might get called with a zero refcounted btf. Fix this, and patch related code accordingly. v3: rephrase a comment (AI) v2: fix a refcount leak introduced in v1 (AI)
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/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check_pseudo_btf_id()函数中BTF对象的引用计数不正确，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-2026-45951
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-45951 (3)
Same Patch Batch · Linux · 2026-05-27 · 276 CVEs total
| CVE-2026-45898 | 9.8 CRITICAL | RDMA/iwcm: Fix workqueue list corruption by removing work_list |
| CVE-2026-45988 | 9.8 CRITICAL | rxrpc: Fix re-decryption of RESPONSE packets |
| CVE-2026-45972 | 9.8 CRITICAL | smb: client: fix potential UAF and double free in smb2_open_file() |
| CVE-2026-46039 | 9.8 CRITICAL | rxgk: Fix potential integer overflow in length check |
| CVE-2026-46043 | 9.1 CRITICAL | RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv |
| CVE-2026-45945 | 8.8 HIGH | iommu/vt-d: Fix race condition during PASID entry replacement |
| CVE-2026-46056 | 8.8 HIGH | Bluetooth: hci_event: fix potential UAF in SSP passkey handlers |
| CVE-2026-46037 | 8.2 HIGH | ipv4: icmp: validate reply type before using icmp_pointers |
| CVE-2026-45843 | 8.2 HIGH | slip: bound decode() reads against the compressed packet length |
| CVE-2026-46099 | 8.1 HIGH | net: ipv6: fix NOREF dst use in seg6 and rpl lwtunnels |
| CVE-2026-46010 | 8.1 HIGH | rxrpc: Fix error handling in rxgk_extract_token() |
| CVE-2026-46076 | 7.9 HIGH | KVM: nSVM: Raise #UD if unhandled VMMCALL isn't intercepted by L1 |
| CVE-2026-46065 | 7.8 HIGH | fbdev: defio: Disconnect deferred I/O from the lifetime of struct fb_info |
| CVE-2026-46036 | 7.8 HIGH | vfio/cdx: Serialize VFIO_DEVICE_SET_IRQS with a per-device mutex |
| CVE-2026-45931 | 7.8 HIGH | accel/amdxdna: Hold mm structure across iommu_sva_unbind_device() |
| CVE-2026-45929 | 7.8 HIGH | ovpn: fix possible use-after-free in ovpn_net_xmit |
| CVE-2026-45852 | 7.8 HIGH | RDMA/rxe: Fix double free in rxe_srq_from_init |
| CVE-2026-45861 | 7.8 HIGH | gfs2: Fix slab-use-after-free in qd_put |
| CVE-2026-46062 | 7.8 HIGH | ntfs3: fix integer overflow in run_unpack() volume boundary check |
| CVE-2026-45862 | 7.8 HIGH | iommu/vt-d: Flush cache for PASID table before using it |
Showing top 20 of 276 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-46243
smb: client: reject userspace cifs.spnego descriptions - 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
Same vendor: Linux
- CVE-2026-46243
smb: client: reject userspace cifs.spnego descriptions - 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
V. Comments for CVE-2026-45951
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