CVE-2026-23449— 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，该漏洞源于竞争条件，可能导致双重释放。
影响版本矩阵 14
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 96009c7d500efdd5534e83b2e3eb2c58d4b137ae< 4e8ebc4c18ea8213d28e6cb867d18fcc67daca21 |
affected |
96009c7d500efdd5534e83b2e3eb2c58d4b137ae< 21c89a0a8de7eadad8d385645a95b3233f23130e |
affected | ||
96009c7d500efdd5534e83b2e3eb2c58d4b137ae< afbc79a7770b230a9f24bd39271209d6b3682c5f |
affected | ||
96009c7d500efdd5534e83b2e3eb2c58d4b137ae< e9c66d3e7d8557b3308e55c613aa07254fe97611 |
affected | ||
96009c7d500efdd5534e83b2e3eb2c58d4b137ae< 4a233447b941db451ea5f5a0942cffd0f7f7eaae |
affected | ||
96009c7d500efdd5534e83b2e3eb2c58d4b137ae< 66360460cab63c248ca5b1070a01c0c29133b960 |
affected | ||
4.18 |
affected | ||
< 4.18 |
unaffected | ||
| … +6 条更多 | |||
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一、 漏洞 CVE-2026-23449 基础信息
漏洞信息
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Vulnerability Title
net/sched: teql: Fix double-free in teql_master_xmit
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
net/sched: teql: Fix double-free in teql_master_xmit
Whenever a TEQL devices has a lockless Qdisc as root, qdisc_reset should
be called using the seq_lock to avoid racing with the datapath. Failure
to do so may cause crashes like the following:
[ 238.028993][ T318] BUG: KASAN: double-free in skb_release_data (net/core/skbuff.c:1139)
[ 238.029328][ T318] Free of addr ffff88810c67ec00 by task poc_teql_uaf_ke/318
[ 238.029749][ T318]
[ 238.029900][ T318] CPU: 3 UID: 0 PID: 318 Comm: poc_teql_ke Not tainted 7.0.0-rc3-00149-ge5b31d988a41 #704 PREEMPT(full)
[ 238.029906][ T318] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 238.029910][ T318] Call Trace:
[ 238.029913][ T318] <TASK>
[ 238.029916][ T318] dump_stack_lvl (lib/dump_stack.c:122)
[ 238.029928][ T318] print_report (mm/kasan/report.c:379 mm/kasan/report.c:482)
[ 238.029940][ T318] ? skb_release_data (net/core/skbuff.c:1139)
[ 238.029944][ T318] ? srso_alias_return_thunk (arch/x86/lib/retpoline.S:221)
...
[ 238.029957][ T318] ? skb_release_data (net/core/skbuff.c:1139)
[ 238.029969][ T318] kasan_report_invalid_free (mm/kasan/report.c:221 mm/kasan/report.c:563)
[ 238.029979][ T318] ? skb_release_data (net/core/skbuff.c:1139)
[ 238.029989][ T318] check_slab_allocation (mm/kasan/common.c:231)
[ 238.029995][ T318] kmem_cache_free (mm/slub.c:2637 (discriminator 1) mm/slub.c:6168 (discriminator 1) mm/slub.c:6298 (discriminator 1))
[ 238.030004][ T318] skb_release_data (net/core/skbuff.c:1139)
...
[ 238.030025][ T318] sk_skb_reason_drop (net/core/skbuff.c:1256)
[ 238.030032][ T318] pfifo_fast_reset (./include/linux/ptr_ring.h:171 ./include/linux/ptr_ring.h:309 ./include/linux/skb_array.h:98 net/sched/sch_generic.c:827)
[ 238.030039][ T318] ? srso_alias_return_thunk (arch/x86/lib/retpoline.S:221)
...
[ 238.030054][ T318] qdisc_reset (net/sched/sch_generic.c:1034)
[ 238.030062][ T318] teql_destroy (./include/linux/spinlock.h:395 net/sched/sch_teql.c:157)
[ 238.030071][ T318] __qdisc_destroy (./include/net/pkt_sched.h:328 net/sched/sch_generic.c:1077)
[ 238.030077][ T318] qdisc_graft (net/sched/sch_api.c:1062 net/sched/sch_api.c:1053 net/sched/sch_api.c:1159)
[ 238.030089][ T318] ? __pfx_qdisc_graft (net/sched/sch_api.c:1091)
[ 238.030095][ T318] ? srso_alias_return_thunk (arch/x86/lib/retpoline.S:221)
[ 238.030102][ T318] ? srso_alias_return_thunk (arch/x86/lib/retpoline.S:221)
[ 238.030106][ T318] ? srso_alias_return_thunk (arch/x86/lib/retpoline.S:221)
[ 238.030114][ T318] tc_get_qdisc (net/sched/sch_api.c:1529 net/sched/sch_api.c:1556)
...
[ 238.072958][ T318] Allocated by task 303 on cpu 5 at 238.026275s:
[ 238.073392][ T318] kasan_save_stack (mm/kasan/common.c:58)
[ 238.073884][ T318] kasan_save_track (mm/kasan/common.c:64 (discriminator 5) mm/kasan/common.c:79 (discriminator 5))
[ 238.074230][ T318] __kasan_slab_alloc (mm/kasan/common.c:369)
[ 238.074578][ T318] kmem_cache_alloc_node_noprof (./include/linux/kasan.h:253 mm/slub.c:4542 mm/slub.c:4869 mm/slub.c:4921)
[ 238.076091][ T318] kmalloc_reserve (net/core/skbuff.c:616 (discriminator 107))
[ 238.076450][ T318] __alloc_skb (net/core/skbuff.c:713)
[ 238.076834][ T318] alloc_skb_with_frags (./include/linux/skbuff.h:1383 net/core/skbuff.c:6763)
[ 238.077178][ T318] sock_alloc_send_pskb (net/core/sock.c:2997)
[ 238.077520][ T318] packet_sendmsg (net/packet/af_packet.c:2926 net/packet/af_packet.c:3019 net/packet/af_packet.c:3108)
[ 238.081469][ T318]
[ 238.081870][ T318] Freed by task 299 on cpu 1 at 238.028496s:
[ 238.082761][ T318] kasan_save_stack (mm/kasan/common.c:58)
[ 238.083481][ T318] kasan_save_track (mm/kasan/common.c:64 (discriminator 5) mm/kasan/common.c:79 (discriminator 5))
[ 238.085348][ T318] kasan_save_free_info (mm/kasan/generic.c:587 (discriminator 1))
[ 238.085900][ T318] __kasan_slab_free (mm/
---truncated---
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，该漏洞源于竞争条件，可能导致双重释放。
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-2026-23449 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 · 2026-04-03 · 共 71 条
| CVE-2026-23450 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-23428 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-23427 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-31402 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-23455 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-23425 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23461 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23462 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23457 | 8.6 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23456 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23459 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-31393 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-31392 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23466 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23445 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-31401 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23437 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23458 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23432 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23444 | 7.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 71 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-23449
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