一、漏洞信息
漏洞编号：CVE-2025-21629
漏洞归属组件：kernel
漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.19,6.4.0,6.6.0
CVSS V3.0分值：
BaseScore：5.5 Medium
Vector：CVSS：3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
漏洞简述：
In the Linux kernel, the following vulnerability has been resolved:net: reenable NETIF_F_IPV6_CSUM offload for BIG TCP packetsThe blamed commit disabled hardware offoad of IPv6 packets withextension headers on devices that advertise NETIF_F_IPV6_CSUM,based on the definition of that feature in skbuff.h: * * - %NETIF_F_IPV6_CSUM * - Driver (device) is only able to checksum plain * TCP or UDP packets over IPv6. These are specifically * unencapsulated packets of the form IPv6|TCP or * IPv6|UDP where the Next Header field in the IPv6 * header is either TCP or UDP. IPv6 extension headers * are not supported with this feature. This feature * cannot be set in features for a device with * NETIF_F_HW_CSUM also set. This feature is being * DEPRECATED (see below).The change causes skb_warn_bad_offload to fire for BIG TCPpackets.[ 496.310233] WARNING: CPU: 13 PID: 23472 at net/core/dev.c:3129 skb_warn_bad_offload+0xc4/0xe0[ 496.310297] ? skb_warn_bad_offload+0xc4/0xe0[ 496.310300] skb_checksum_help+0x129/0x1f0[ 496.310303] skb_csum_hwoffload_help+0x150/0x1b0[ 496.310306] validate_xmit_skb+0x159/0x270[ 496.310309] validate_xmit_skb_list+0x41/0x70[ 496.310312] sch_direct_xmit+0x5c/0x250[ 496.310317] __qdisc_run+0x388/0x620BIG TCP introduced an IPV6_TLV_JUMBO IPv6 extension header tocommunicate packet length, as this is an IPv6 jumbogram. But, thefeature is only enabled on devices that support BIG TCP TSO. Theheader is only present for PF_PACKET taps like tcpdump, and nottransmitted by physical devices.For this specific case of extension headers that are nottransmitted, return to the situation before the blamed commitand support hardware offload.ipv6_has_hopopt_jumbo() tests not only whether this header is present,but also that it is the only extension header before a terminal (L4)header.
漏洞公开时间：2025-01-15 21:15:15
漏洞创建时间：2025-01-17 01:16:39
漏洞详情参考链接：
https://nvd.nist.gov/vuln/detail/CVE-2025-21629

漏洞分析指导链接：
https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md
漏洞数据来源:
openBrain开源漏洞感知系统
漏洞补丁信息：

二、漏洞分析结构反馈
影响性分析说明：
Reserved.
openEuler评分：
5.5
Vector：CVSS：3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
受影响版本排查(受影响/不受影响)：
1.openEuler-24.03-LTS(6.6.0):受影响
2.openEuler-24.03-LTS-SP1(6.6.0):受影响
3.openEuler-20.03-LTS-SP4(4.19.90):不受影响
4.openEuler-22.03-LTS-SP3(5.10.0):不受影响
5.openEuler-22.03-LTS-SP4:不受影响
6.master(6.6.0):不受影响
7.openEuler-24.03-LTS-Next(6.6.0):不受影响

修复是否涉及abi变化(是/否)：
1.openEuler-20.03-LTS-SP4(4.19.90):否
2.openEuler-22.03-LTS-SP3(5.10.0):否
3.master(6.6.0):否
4.openEuler-24.03-LTS(6.6.0):否
5.openEuler-24.03-LTS-Next(6.6.0):否
6.openEuler-22.03-LTS-SP4:否
7.openEuler-24.03-LTS-SP1(6.6.0):否

原因说明：
1.openEuler-24.03-LTS(6.6.0):正常修复
2.openEuler-24.03-LTS-SP1(6.6.0):正常修复
3.master(6.6.0):不受影响-漏洞代码不能被攻击者触发
4.openEuler-24.03-LTS-Next(6.6.0):不受影响-漏洞代码不能被攻击者触发
5.openEuler-20.03-LTS-SP4(4.19.90):不受影响-漏洞代码不存在
6.openEuler-22.03-LTS-SP3(5.10.0):不受影响-漏洞代码不存在
7.openEuler-22.03-LTS-SP4:不受影响-漏洞代码不存在

三、漏洞修复
安全公告链接：https://www.openeuler.org/zh/security/safety-bulletin/detail/?id=openEuler-SA-2025-1321