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CVE-2026-74720— bpf: Preserve pointer state for commuted arithmetic

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基金会开源的一个操作系统内核。 Linux kernel 4.16版本存在安全漏洞，该漏洞源于BPF验证器adjust_ptr_min_max_vals()函数在处理scalar += pointer运算时仅复制部分指针状态字段，可能导致指针状态错误。

CVSS 7.8 · High EPSS 0.13% · P2

Possible ATT&CK Techniques 1 AI

T1564.004 · NTFS File Attributes

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux f4d7e40a5b7157e1329c3c5b10f60d8289fc2941< 86b203aadc2930e0a4f9c6277b5b80ff3664c472 affected
f4d7e40a5b7157e1329c3c5b10f60d8289fc2941< 8109c25e0c41f5f19a1c2380bb49c991a877494e affected
f4d7e40a5b7157e1329c3c5b10f60d8289fc2941< d1959028190a7649b926f5867a58de5fe221b23c affected
f4d7e40a5b7157e1329c3c5b10f60d8289fc2941< 8cb23101a3fcc7432b451ea3d0f14a90711f4acf affected
f4d7e40a5b7157e1329c3c5b10f60d8289fc2941< 29c239f8dbec5ab33a61796724d189bddee6cd4b affected
f4d7e40a5b7157e1329c3c5b10f60d8289fc2941< db6382ed3361bdd8129572a3423956cba1dae829 affected
f4d7e40a5b7157e1329c3c5b10f60d8289fc2941< eaffa1495e4fe6330aeff9f323ea3d48b01f118a affected
f4d7e40a5b7157e1329c3c5b10f60d8289fc2941< a4c6f804b44c5c790269b25e0e61cf4e9f117c86 affected
… +10 more rows
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I. Basic Information for CVE-2026-74720

Vulnerability Information
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Vulnerability Title
bpf: Preserve pointer state for commuted arithmetic
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Preserve pointer state for commuted arithmetic When scalar += pointer is handled in adjust_ptr_min_max_vals(), the destination register inherits the pointer state from the source pointer. Copying only selected fields is fragile because pointer provenance is tracked by several bpf_reg_state fields. Use the caller's temporary offset register to preserve the scalar operand while replacing the destination with the full pointer state. This preserves the frame number for PTR_TO_STACK registers and keeps parent identity fields consistent.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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基金会开源的一个操作系统内核。 Linux kernel 4.16版本存在安全漏洞，该漏洞源于BPF验证器adjust_ptr_min_max_vals()函数在处理scalar += pointer运算时仅复制部分指针状态字段，可能导致指针状态错误。
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 f4d7e40a5b7157e1329c3c5b10f60d8289fc2941 ~ 86b203aadc2930e0a4f9c6277b5b80ff3664c472 -
Linux Linux 4.16 -

II. Public POCs for CVE-2026-74720

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III. Intelligence Information for CVE-2026-74720

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Patches & Fixes for CVE-2026-74720 (8)

Same Patch Batch · Linux · 2026-08-22 · 149 CVEs total

CVE-2026-74612 10.0 CRITICAL veth: fix skb length accounting after XDP frag adjustment
CVE-2026-74705 10.0 CRITICAL udp: fix potential use-after-free in tunnel segmentation
CVE-2026-74617 9.8 CRITICAL dibs: initialise dibs->lock in dibs_dev_alloc()
CVE-2026-74586 9.8 CRITICAL sctp: clear new_transport when removing a peer
CVE-2026-74587 9.8 CRITICAL sctp: fix use-after-free of cached ASCONF chunk
CVE-2026-74588 9.8 CRITICAL sctp: keep chunk->transport in step with the list it is queued on
CVE-2026-74616 9.8 CRITICAL xdp: reject clones that overrun skb_shared_info tailroom
CVE-2026-74591 9.8 CRITICAL mm/filemap: __filemap_add_folio() restore index before retrying
CVE-2026-74611 9.8 CRITICAL tls: rx: restore msg_iter before TLS 1.3 optimistic retry
CVE-2026-74730 9.8 CRITICAL NFS: Pin the 'struct nfs_server' during a FREE_STATEID call
CVE-2026-74662 9.8 CRITICAL inet: frags: publish queues before arming timer
CVE-2026-74608 9.8 CRITICAL smb: client: Fix use-after-free in cifs_try_adding_channels()
CVE-2026-74723 9.8 CRITICAL btrfs: lzo: reject inline extents without valid headers
CVE-2026-74597 9.8 CRITICAL ip6_tunnel: clear skb2->cb[] in ip6ip6_err()
CVE-2026-74669 9.8 CRITICAL ipvs: clear IPv4 options after rebasing tunnel ICMP errors
CVE-2026-74628 9.8 CRITICAL net/x25: fix use-after-free of the socket by its timers
CVE-2026-74688 9.8 CRITICAL sctp: clear control chunk transport if it is being removed
CVE-2026-74727 9.8 CRITICAL ovpn: skip rehash for peers already removed from by_id
CVE-2026-74712 9.3 CRITICAL vdpa/mlx5: Fix buffer length in create_direct_keys()
CVE-2026-74665 9.1 CRITICAL net: fix skb length accounting after generic XDP frag adjustment

Showing top 20 of 149 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-74720

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