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CVE-2025-39978— octeontx2-pf: Fix potential use after free in otx2_tc_add_flow()

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存在安全漏洞，该漏洞源于otx2_tc_add_flow函数中存在释放后重用风险，可能导致内存损坏。

CVSS 7.8 · High EPSS 0.15% · P4

Possible ATT&CK Techniques 1 AI

T1211 · Exploitation for Stealth

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux 68fbff68dbea35f9e6f7649dd22fce492a5aedac< 5723120423a753a220b8b2954b273838b9d7e74a affected
68fbff68dbea35f9e6f7649dd22fce492a5aedac< df2c071061ed52d2225d97b212d27ecedf456b8a affected
68fbff68dbea35f9e6f7649dd22fce492a5aedac< c41b2941a024d4ec7c768e16ffb10a74b188fced affected
68fbff68dbea35f9e6f7649dd22fce492a5aedac< a8a63f27c3a8a3714210d32b12fd0f16d0337414 affected
68fbff68dbea35f9e6f7649dd22fce492a5aedac< d9c70e93ec5988ab07ad2a92d9f9d12867f02c56 affected
5.14 affected
< 5.14 unaffected
6.1.155≤ 6.1.* unaffected
… +4 more rows
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I. Basic Information for CVE-2025-39978

Vulnerability Information
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Vulnerability Title
octeontx2-pf: Fix potential use after free in otx2_tc_add_flow()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: octeontx2-pf: Fix potential use after free in otx2_tc_add_flow() This code calls kfree_rcu(new_node, rcu) and then dereferences "new_node" and then dereferences it on the next line. Two lines later, we take a mutex so I don't think this is an RCU safe region. Re-order it to do the dereferences before queuing up the free.
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otx2_tc_add_flow函数中存在释放后重用风险，可能导致内存损坏。
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 68fbff68dbea35f9e6f7649dd22fce492a5aedac ~ 5723120423a753a220b8b2954b273838b9d7e74a -
Linux Linux 5.14 -

II. Public POCs for CVE-2025-39978

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III. Intelligence Information for CVE-2025-39978

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Same Patch Batch · Linux · 2025-10-15 · 34 CVEs total

CVE-2025-39975 9.8 CRITICAL smb: client: fix wrong index reference in smb2_compound_op()
CVE-2025-39973 8.8 HIGH i40e: add validation for ring_len param
CVE-2025-39972 8.8 HIGH i40e: fix idx validation in i40e_validate_queue_map
CVE-2025-39969 8.8 HIGH i40e: fix validation of VF state in get resources
CVE-2025-39971 8.8 HIGH i40e: fix idx validation in config queues msg
CVE-2025-39970 8.8 HIGH i40e: fix input validation logic for action_meta
CVE-2025-39982 8.8 HIGH Bluetooth: hci_event: Fix UAF in hci_acl_create_conn_sync
CVE-2025-40000 8.8 HIGH wifi: rtw89: fix use-after-free in rtw89_core_tx_kick_off_and_wait()
CVE-2025-39983 8.8 HIGH Bluetooth: hci_event: Fix UAF in hci_conn_tx_dequeue
CVE-2025-39987 7.8 HIGH can: hi311x: populate ndo_change_mtu() to prevent buffer overflow
CVE-2025-39976 7.8 HIGH futex: Use correct exit on failure from futex_hash_allocate_default()
CVE-2025-39977 7.8 HIGH futex: Prevent use-after-free during requeue-PI
CVE-2025-39979 7.8 HIGH net/mlx5: fs, fix UAF in flow counter release
CVE-2025-39981 7.8 HIGH Bluetooth: MGMT: Fix possible UAFs
CVE-2025-39985 7.8 HIGH can: mcba_usb: populate ndo_change_mtu() to prevent buffer overflow
CVE-2025-39986 7.8 HIGH can: sun4i_can: populate ndo_change_mtu() to prevent buffer overflow
CVE-2025-39988 7.8 HIGH can: etas_es58x: populate ndo_change_mtu() to prevent buffer overflow
CVE-2025-39990 7.8 HIGH bpf: Check the helper function is valid in get_helper_proto
CVE-2025-39993 7.8 HIGH media: rc: fix races with imon_disconnect()
CVE-2025-39967 7.8 HIGH fbcon: fix integer overflow in fbcon_do_set_font

Showing top 20 of 34 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-39978

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