CVE-2025-39988— Linux kernel 安全漏洞
一分钟漏洞结论
影响对象
Linux Linux
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
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etas_es58x驱动未实现ndo_change_mtu函数，可能导致缓冲区溢出攻击。
可能的 ATT&CK 技术 1 AI
T1190 · Exploit Public-Facing Application影响版本矩阵 14
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 8537257874e949a59c834cecfd5a063e11b64b0b< 72de0facc50afdb101fb7197d880407f1abfc77f |
affected |
8537257874e949a59c834cecfd5a063e11b64b0b< c4e582e686c4d683c87f2b4a316385b3d81d370f |
affected | ||
8537257874e949a59c834cecfd5a063e11b64b0b< cbc1de71766f326a44bb798aeae4a7ef4a081cc9 |
affected | ||
8537257874e949a59c834cecfd5a063e11b64b0b< b26cccd87dcddc47b450a40f3b1ac3fe346efcff |
affected | ||
8537257874e949a59c834cecfd5a063e11b64b0b< e587af2c89ecc6382c518febea52fa9ba81e47c0 |
affected | ||
8537257874e949a59c834cecfd5a063e11b64b0b< 38c0abad45b190a30d8284a37264d2127a6ec303 |
affected | ||
5.13 |
affected | ||
< 5.13 |
unaffected | ||
| … +6 条更多 | |||
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一、 漏洞 CVE-2025-39988 基础信息
漏洞信息
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Vulnerability Title
can: etas_es58x: populate ndo_change_mtu() to prevent buffer overflow
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
can: etas_es58x: populate ndo_change_mtu() to prevent buffer overflow
Sending an PF_PACKET allows to bypass the CAN framework logic and to
directly reach the xmit() function of a CAN driver. The only check
which is performed by the PF_PACKET framework is to make sure that
skb->len fits the interface's MTU.
Unfortunately, because the etas_es58x driver does not populate its
net_device_ops->ndo_change_mtu(), it is possible for an attacker to
configure an invalid MTU by doing, for example:
$ ip link set can0 mtu 9999
After doing so, the attacker could open a PF_PACKET socket using the
ETH_P_CANXL protocol:
socket(PF_PACKET, SOCK_RAW, htons(ETH_P_CANXL));
to inject a malicious CAN XL frames. For example:
struct canxl_frame frame = {
.flags = 0xff,
.len = 2048,
};
The CAN drivers' xmit() function are calling can_dev_dropped_skb() to
check that the skb is valid, unfortunately under above conditions, the
malicious packet is able to go through can_dev_dropped_skb() checks:
1. the skb->protocol is set to ETH_P_CANXL which is valid (the
function does not check the actual device capabilities).
2. the length is a valid CAN XL length.
And so, es58x_start_xmit() receives a CAN XL frame which it is not
able to correctly handle and will thus misinterpret it as a CAN(FD)
frame.
This can result in a buffer overflow. For example, using the es581.4
variant, the frame will be dispatched to es581_4_tx_can_msg(), go
through the last check at the beginning of this function:
if (can_is_canfd_skb(skb))
return -EMSGSIZE;
and reach this line:
memcpy(tx_can_msg->data, cf->data, cf->len);
Here, cf->len corresponds to the flags field of the CAN XL frame. In
our previous example, we set canxl_frame->flags to 0xff. Because the
maximum expected length is 8, a buffer overflow of 247 bytes occurs!
Populate net_device_ops->ndo_change_mtu() to ensure that the
interface's MTU can not be set to anything bigger than CAN_MTU or
CANFD_MTU (depending on the device capabilities). By fixing the root
cause, this prevents the buffer overflow.
来源: 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
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
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etas_es58x驱动未实现ndo_change_mtu函数，可能导致缓冲区溢出攻击。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2025-39988 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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同批安全公告 · Linux · 2025-10-15 · 共 34 条
| CVE-2025-39975 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-40000 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-39969 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-39971 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-39970 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-39972 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-39973 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-39983 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-39982 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-39966 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-39967 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-39976 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-39977 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-39978 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-39979 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-39981 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-39985 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-39986 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-39987 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-39990 | 7.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 34 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2025-39988
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