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CVE-2025-21680— pktgen: Avoid out-of-bounds access in get_imix_entries

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基金会的开源操作系统Linux所使用的内核。 Linux kernel存在输入验证错误漏洞，该漏洞源于pktgen的get_imix_entries函数中对imix_entries数组的边界检查错误，导致在传递大量条目时访问数组越界，可能引发系统崩溃。

CVSS 7.8 · High EPSS 0.22% · P13

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux 52a62f8603f97e720882c8f5aff2767ac6a11d5f< 3450092cc2d1c311c5ea92a2486daa2a33520ea5 affected
52a62f8603f97e720882c8f5aff2767ac6a11d5f< e5d24a7074dcd0c7e76b7e7e4efbbe7418d62486 affected
52a62f8603f97e720882c8f5aff2767ac6a11d5f< 7cde21f52042aa2e29a654458166b873d2ae66b3 affected
52a62f8603f97e720882c8f5aff2767ac6a11d5f< 1a9b65c672ca9dc4ba52ca2fd54329db9580ce29 affected
52a62f8603f97e720882c8f5aff2767ac6a11d5f< 76201b5979768500bca362871db66d77cb4c225e affected
5.15 affected
< 5.15 unaffected
5.15.177≤ 5.15.* unaffected
… +4 more rows
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I. Basic Information for CVE-2025-21680

Vulnerability Information
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Vulnerability Title
pktgen: Avoid out-of-bounds access in get_imix_entries
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: pktgen: Avoid out-of-bounds access in get_imix_entries Passing a sufficient amount of imix entries leads to invalid access to the pkt_dev->imix_entries array because of the incorrect boundary check. UBSAN: array-index-out-of-bounds in net/core/pktgen.c:874:24 index 20 is out of range for type 'imix_pkt [20]' CPU: 2 PID: 1210 Comm: bash Not tainted 6.10.0-rc1 #121 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996) Call Trace: <TASK> dump_stack_lvl lib/dump_stack.c:117 __ubsan_handle_out_of_bounds lib/ubsan.c:429 get_imix_entries net/core/pktgen.c:874 pktgen_if_write net/core/pktgen.c:1063 pde_write fs/proc/inode.c:334 proc_reg_write fs/proc/inode.c:346 vfs_write fs/read_write.c:593 ksys_write fs/read_write.c:644 do_syscall_64 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe arch/x86/entry/entry_64.S:130 Found by Linux Verification Center (linuxtesting.org) with SVACE. [ fp: allow to fill the array completely; minor changelog cleanup ]
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 输入验证错误漏洞
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存在输入验证错误漏洞，该漏洞源于pktgen的get_imix_entries函数中对imix_entries数组的边界检查错误，导致在传递大量条目时访问数组越界，可能引发系统崩溃。
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 52a62f8603f97e720882c8f5aff2767ac6a11d5f ~ 3450092cc2d1c311c5ea92a2486daa2a33520ea5 -
Linux Linux 5.15 -

II. Public POCs for CVE-2025-21680

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III. Intelligence Information for CVE-2025-21680

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Patches & Fixes for CVE-2025-21680 (5)

Same Patch Batch · Linux · 2025-01-31 · 20 CVEs total

CVE-2025-21673 9.8 CRITICAL smb: client: fix double free of TCP_Server_Info::hostname
CVE-2025-21669 7.8 HIGH vsock/virtio: discard packets if the transport changes
CVE-2025-21678 7.8 HIGH gtp: Destroy device along with udp socket's netns dismantle.
CVE-2025-21677 7.8 HIGH pfcp: Destroy device along with udp socket's netns dismantle.
CVE-2025-21676 7.5 HIGH net: fec: handle page_pool_dev_alloc_pages error
CVE-2025-21682 7.3 HIGH eth: bnxt: always recalculate features after XDP clearing, fix null-deref
CVE-2025-21679 btrfs: add the missing error handling inside get_canonical_dev_path
CVE-2025-21675 net/mlx5: Clear port select structure when fail to create
CVE-2025-21674 net/mlx5e: Fix inversion dependency warning while enabling IPsec tunnel
CVE-2025-21681 openvswitch: fix lockup on tx to unregistering netdev with carrier
CVE-2025-21672 afs: Fix merge preference rule failure condition
CVE-2025-21671 zram: fix potential UAF of zram table
CVE-2025-21670 vsock/bpf: return early if transport is not assigned
CVE-2025-21683 bpf: Fix bpf_sk_select_reuseport() memory leak
CVE-2025-21668 pmdomain: imx8mp-blk-ctrl: add missing loop break condition
CVE-2025-21667 iomap: avoid avoid truncating 64-bit offset to 32 bits
CVE-2025-21666 vsock: prevent null-ptr-deref in vsock_*[has_data|has_space]
CVE-2025-21665 filemap: avoid truncating 64-bit offset to 32 bits
CVE-2024-57948 mac802154: check local interfaces before deleting sdata list

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-21680

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