CVE-2025-21961

一、漏洞信息
 漏洞编号：[CVE-2025-21961](https://nvd.nist.gov/vuln/detail/CVE-2025-21961)
 漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)
 漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.19,6.1.8,6.4.0,6.6.0
 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:eth: bnxt: fix truesize for mb-xdp-pass caseWhen mb-xdp is set and return is XDP_PASS, packet is converted fromxdp_buff to sk_buff with xdp_update_skb_shared_info() inbnxt_xdp_build_skb().bnxt_xdp_build_skb() passes incorrect truesize argument toxdp_update_skb_shared_info().The truesize is calculated as BNXT_RX_PAGE_SIZE * sinfo->nr_frags butthe skb_shared_info was wiped by napi_build_skb() before.So it stores sinfo->nr_frags before bnxt_xdp_build_skb() and use itinstead of getting skb_shared_info from xdp_get_shared_info_from_buff().Splat looks like: ------------[ cut here ]------------ WARNING: CPU: 2 PID: 0 at net/core/skbuff.c:6072 skb_try_coalesce+0x504/0x590 Modules linked in: xt_nat xt_tcpudp veth af_packet xt_conntrack nft_chain_nat xt_MASQUERADE nf_conntrack_netlink xfrm_user xt_addrtype nft_coms CPU: 2 UID: 0 PID: 0 Comm: swapper/2 Not tainted 6.14.0-rc2+ #3 RIP: 0010:skb_try_coalesce+0x504/0x590 Code: 4b fd ff ff 49 8b 34 24 40 80 e6 40 0f 84 3d fd ff ff 49 8b 74 24 48 40 f6 c6 01 0f 84 2e fd ff ff 48 8d 4e ff e9 25 fd ff ff <0f> 0b e99 RSP: 0018:ffffb62c4120caa8 EFLAGS: 00010287 RAX: 0000000000000003 RBX: ffffb62c4120cb14 RCX: 0000000000000ec0 RDX: 0000000000001000 RSI: ffffa06e5d7dc000 RDI: 0000000000000003 RBP: ffffa06e5d7ddec0 R08: ffffa06e6120a800 R09: ffffa06e7a119900 R10: 0000000000002310 R11: ffffa06e5d7dcec0 R12: ffffe4360575f740 R13: ffffe43600000000 R14: 0000000000000002 R15: 0000000000000002 FS:  0000000000000000(0000) GS:ffffa0755f700000(0000) knlGS:0000000000000000 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f147b76b0f8 CR3: 00000001615d4000 CR4: 00000000007506f0 PKRU: 55555554 Call Trace:  <IRQ>  ? __warn+0x84/0x130  ? skb_try_coalesce+0x504/0x590  ? report_bug+0x18a/0x1a0  ? handle_bug+0x53/0x90  ? exc_invalid_op+0x14/0x70  ? asm_exc_invalid_op+0x16/0x20  ? skb_try_coalesce+0x504/0x590  inet_frag_reasm_finish+0x11f/0x2e0  ip_defrag+0x37a/0x900  ip_local_deliver+0x51/0x120  ip_sublist_rcv_finish+0x64/0x70  ip_sublist_rcv+0x179/0x210  ip_list_rcv+0xf9/0x130How to reproduce:<Node A>ip link set $interface1 xdp obj xdp_pass.oip link set $interface1 mtu 9000 upip a a 10.0.0.1/24 dev $interface1<Node B>ip link set $interfac2 mtu 9000 upip a a 10.0.0.2/24 dev $interface2ping 10.0.0.1 -s 65000Following ping.py patch adds xdp-mb-pass case. so ping.py is going to beable to reproduce this issue.
 漏洞公开时间：2025-04-02 00:15:27
 漏洞创建时间：2025-04-07 18:45:13
 漏洞详情参考链接：
  https://nvd.nist.gov/vuln/detail/CVE-2025-21961
<details>
<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |
| ------- | -------- | -------- |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/19107e71be330dbccb9f8f9f4cf0a9abeadad802 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/9f7b2aa5034e24d3c49db73d5f760c0435fe31c2 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/b4679807c6083ade4d47f03f80da891afcb6ef62 |  |
| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2025-21961 | https://bugzilla.suse.com/show_bug.cgi?id=1240816 |
| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2025/CVE-2025-21961.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1240816 |
| suse_bugzilla | https://git.kernel.org/stable/c/19107e71be330dbccb9f8f9f4cf0a9abeadad802 | https://bugzilla.suse.com/show_bug.cgi?id=1240816 |
| suse_bugzilla | https://git.kernel.org/stable/c/b4679807c6083ade4d47f03f80da891afcb6ef62 | https://bugzilla.suse.com/show_bug.cgi?id=1240816 |
| suse_bugzilla | https://git.kernel.org/stable/c/9f7b2aa5034e24d3c49db73d5f760c0435fe31c2 | https://bugzilla.suse.com/show_bug.cgi?id=1240816 |
| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2025-21961 | https://bugzilla.suse.com/show_bug.cgi?id=1240816 |
| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2356584 | https://bugzilla.suse.com/show_bug.cgi?id=1240816 |
| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2025040144-CVE-2025-21961-5759@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2356584 |
| anolis |  | https://anas.openanolis.cn/cves/detail/CVE-2025-21961 |

</details>

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：
  <details>
<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源  |
| ------- | -------- | ------- | -------- | --------- |
|  |  | https://git.kernel.org/stable/c/19107e71be330dbccb9f8f9f4cf0a9abeadad802 |  | nvd |
|  |  | https://git.kernel.org/stable/c/9f7b2aa5034e24d3c49db73d5f760c0435fe31c2 |  | nvd |
|  |  | https://git.kernel.org/stable/c/b4679807c6083ade4d47f03f80da891afcb6ef62 |  | nvd |
| linux_kernel | 6.12.20 | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=19107e71be330dbccb9f8f9f4cf0a9abeadad802Issue | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=1dc4c557bfedfcdf7fc0c46795857773b7ad66e7 | linuxkernelcves |
| linux_kernel | 6.13.8 | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=b4679807c6083ade4d47f03f80da891afcb6ef62Issue | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=1dc4c557bfedfcdf7fc0c46795857773b7ad66e7 | linuxkernelcves |
| linux_kernel | 6.14 | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=9f7b2aa5034e24d3c49db73d5f760c0435fe31c2Please | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=1dc4c557bfedfcdf7fc0c46795857773b7ad66e7 | linuxkernelcves |

</details>

二、漏洞分析结构反馈
 影响性分析说明：
  In the Linux kernel, the following vulnerability has been resolved:eth: bnxt: fix truesize for mb-xdp-pass caseWhen mb-xdp is set and return is XDP_PASS, packet is converted fromxdp_buff to sk_buff with xdp_update_skb_shared_info() inbnxt_xdp_build_skb().bnxt_xdp_build_skb() passes incorrect truesize argument toxdp_update_skb_shared_info().The truesize is calculated as BNXT_RX_PAGE_SIZE * sinfo-&gt;nr_frags butthe skb_shared_info was wiped by napi_build_skb() before.So it stores sinfo-&gt;nr_frags before bnxt_xdp_build_skb() and use itinstead of getting skb_shared_info from xdp_get_shared_info_from_buff().Splat looks like: ------------[ cut here ]------------ WARNING: CPU: 2 PID: 0 at net/core/skbuff.c:6072 skb_try_coalesce+0x504/0x590 Modules linked in: xt_nat xt_tcpudp veth af_packet xt_conntrack nft_chain_nat xt_MASQUERADE nf_conntrack_netlink xfrm_user xt_addrtype nft_coms CPU: 2 UID: 0 PID: 0 Comm: swapper/2 Not tainted 6.14.0-rc2+ #3 RIP: 0010:skb_try_coalesce+0x504/0x590 Code: 4b fd ff ff 49 8b 34 24 40 80 e6 40 0f 84 3d fd ff ff 49 8b 74 24 48 40 f6 c6 01 0f 84 2e fd ff ff 48 8d 4e ff e9 25 fd ff ff &lt;0f&gt; 0b e99 RSP: 0018:ffffb62c4120caa8 EFLAGS: 00010287 RAX: 0000000000000003 RBX: ffffb62c4120cb14 RCX: 0000000000000ec0 RDX: 0000000000001000 RSI: ffffa06e5d7dc000 RDI: 0000000000000003 RBP: ffffa06e5d7ddec0 R08: ffffa06e6120a800 R09: ffffa06e7a119900 R10: 0000000000002310 R11: ffffa06e5d7dcec0 R12: ffffe4360575f740 R13: ffffe43600000000 R14: 0000000000000002 R15: 0000000000000002 FS:  0000000000000000(0000) GS:ffffa0755f700000(0000) knlGS:0000000000000000 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f147b76b0f8 CR3: 00000001615d4000 CR4: 00000000007506f0 PKRU: 55555554 Call Trace:  &lt;IRQ&gt;  ? __warn+0x84/0x130  ? skb_try_coalesce+0x504/0x590  ? report_bug+0x18a/0x1a0  ? handle_bug+0x53/0x90  ? exc_invalid_op+0x14/0x70  ? asm_exc_invalid_op+0x16/0x20  ? skb_try_coalesce+0x504/0x590  inet_frag_reasm_finish+0x11f/0x2e0  ip_defrag+0x37a/0x900  ip_local_deliver+0x51/0x120  ip_sublist_rcv_finish+0x64/0x70  ip_sublist_rcv+0x179/0x210  ip_list_rcv+0xf9/0x130How to reproduce:&lt;Node A&gt;ip link set $interface1 xdp obj xdp_pass.oip link set $interface1 mtu 9000 upip a a 10.0.0.1/24 dev $interface1&lt;Node B&gt;ip link set $interfac2 mtu 9000 upip a a 10.0.0.2/24 dev $interface2ping 10.0.0.1 -s 65000Following ping.py patch adds xdp-mb-pass case. so ping.py is going to beable to reproduce this issue.The Linux kernel CVE team has assigned CVE-2025-21961 to this issue.
 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-24.03-LTS-SP2(6.6.0):受影响
4.master(6.12.33):不受影响
5.openEuler-20.03-LTS-SP4(4.19.90):不受影响
6.openEuler-22.03-LTS-SP3(5.10.0):不受影响
7.openEuler-22.03-LTS-SP4(5.10.0):不受影响
8.openEuler-24.03-LTS-Next(6.6.0):不受影响

修复是否涉及abi变化(是/否)：
  1.master(6.12.33):否
2.openEuler-20.03-LTS-SP4(4.19.90):否
3.openEuler-22.03-LTS-SP3(5.10.0):否
4.openEuler-22.03-LTS-SP4(5.10.0):否
5.openEuler-24.03-LTS(6.6.0):否
6.openEuler-24.03-LTS-Next(6.6.0):否
7.openEuler-24.03-LTS-SP1(6.6.0):否
8.openEuler-24.03-LTS-SP2(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.openEuler-24.03-LTS-SP2(6.6.0):正常修复
4.master(6.12.33):不受影响-漏洞代码不能被攻击者触发
5.openEuler-24.03-LTS-Next(6.6.0):不受影响-漏洞代码不能被攻击者触发
6.openEuler-20.03-LTS-SP4(4.19.90):不受影响-漏洞代码不存在
7.openEuler-22.03-LTS-SP3(5.10.0):不受影响-漏洞代码不存在
8.openEuler-22.03-LTS-SP4(5.10.0):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-2025-1880

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