CVE-2026-53095— bpf: Fix abuse of kprobe_write_ctx via freplace
Possible ATT&CK Techniques 2AI
T1055 · Process Injection T1068 · Exploitation for Privilege EscalationAffected Version Matrix 8
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 7384893d970ea114952aef54ad7e3d7d2ca82d4f< b312cf41b9e43f442613053f6cad39898e1baf96 | affected |
7384893d970ea114952aef54ad7e3d7d2ca82d4f< 9836cadbd96c7e0dbb0018fa60e7872dd31ac4f8 | affected | ||
7384893d970ea114952aef54ad7e3d7d2ca82d4f< 611fe4b79af72d00d80f2223354284447daafae9 | affected | ||
6.18 | affected | ||
< 6.18 | unaffected | ||
6.18.33≤ 6.18.* | unaffected | ||
7.0.10≤ 7.0.* | unaffected | ||
7.1≤ * | unaffected |
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I. Basic Information for CVE-2026-53095
Vulnerability Information
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Vulnerability Title
bpf: Fix abuse of kprobe_write_ctx via freplace
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix abuse of kprobe_write_ctx via freplace uprobe programs are allowed to modify struct pt_regs. Since the actual program type of uprobe is KPROBE, it can be abused to modify struct pt_regs via kprobe+freplace when the kprobe attaches to kernel functions. For example, SEC("?kprobe") int kprobe(struct pt_regs *regs) { return 0; } SEC("?freplace") int freplace_kprobe(struct pt_regs *regs) { regs->di = 0; return 0; } freplace_kprobe prog will attach to kprobe prog. kprobe prog will attach to a kernel function. Without this patch, when the kernel function runs, its first arg will always be set as 0 via the freplace_kprobe prog. To fix the abuse of kprobe_write_ctx=true via kprobe+freplace, disallow attaching freplace programs on kprobe programs with different kprobe_write_ctx values.
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 6.18版本存在安全漏洞，该漏洞源于bpf对kprobe_write_ctx的滥用，可能导致攻击者通过kprobe+freplace修改struct pt_regs。
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-2026-53095
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-53095 (3)
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-2026-53046 | 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-2026-53086 | 9.8 CRITICAL | net: bcmgenet: fix racing timeout handler |
| 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-2026-53010 | 9.8 CRITICAL | ksmbd: fix use-after-free in smb2_open during durable reconnect |
| CVE-2026-52931 | 9.8 CRITICAL | batman-adv: tp_meter: avoid use of uninit sender vars |
| 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-2026-52958 | 9.1 CRITICAL | libceph: Fix potential out-of-bounds access in osdmap_decode() |
| CVE-2026-53043 | 9.1 CRITICAL | ocfs2/dlm: validate qr_numregions in dlm_match_regions() |
| CVE-2026-52999 | 9.1 CRITICAL | netfilter: nfnetlink_osf: fix out-of-bounds read on option matching |
Showing top 20 of 219 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-74579
netfilter: nft_payload: fix mask build for partial field off - CVE-2026-74578
crypto: algif_skcipher - force synchronous processing on tre - CVE-2026-74577
net: mpls: initialize rtm_tos in mpls_getroute() - CVE-2026-74576
mm/slab: prevent unbounded recursion in free path with new k - CVE-2026-74574
dmaengine: idxd: fix fdev setup failure cleanup in idxd_cdev
Same vendor: Linux
- CVE-2026-74579
netfilter: nft_payload: fix mask build for partial field off - CVE-2026-74578
crypto: algif_skcipher - force synchronous processing on tre - CVE-2026-74577
net: mpls: initialize rtm_tos in mpls_getroute() - CVE-2026-74576
mm/slab: prevent unbounded recursion in free path with new k - CVE-2026-74574
dmaengine: idxd: fix fdev setup failure cleanup in idxd_cdev
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