CVE-2026-53259— 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基金会开源的操作系统Linux所使用的内核。 Linux kernel 6.17版本存在安全漏洞，该漏洞源于在IPv6 anycast地址处理中，由于在地广播地址（aca）插入全局哈希表时未在idev->lock保护下进行，导致释放后重用。
影响版本矩阵 8
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | eb1ac9ff6c4a5720b1a1476233be374c5dc44bff< 15be7e9fdbff831fb3e89b83cc337a4f85ad3310 |
affected |
eb1ac9ff6c4a5720b1a1476233be374c5dc44bff< 3a967c498baa976b11d4800dda224c507416e97c |
affected | ||
eb1ac9ff6c4a5720b1a1476233be374c5dc44bff< f723ccaff2fb72b71ae8a9fd283f0dee4d9ae7a3 |
affected | ||
6.17 |
affected | ||
< 6.17 |
unaffected | ||
6.18.36≤ 6.18.* |
unaffected | ||
7.0.13≤ 7.0.* |
unaffected | ||
7.1≤ * |
unaffected |
获取后续新漏洞提醒
登录后订阅
一、 漏洞 CVE-2026-53259 基础信息
漏洞信息
对漏洞内容有疑问？看看神龙的深度分析是否有帮助！
查看神龙十问 ↗
尽管我们使用了先进的大模型技术，但其输出仍可能包含不准确或过时的信息。神龙努力确保数据的准确性，但请您根据实际情况进行核实和判断。
Vulnerability Title
ipv6: anycast: insert aca into global hash under idev->lock
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
ipv6: anycast: insert aca into global hash under idev->lock
syzbot reported a splat [1]: a slab-use-after-free in
ipv6_chk_acast_addr(), which walks the global inet6_acaddr_lst[] hash
under RCU and dereferences a struct ifacaddr6 that has already been
freed while still linked in the hash, so a later reader walks into a
dangling node.
In __ipv6_dev_ac_inc() the aca is allocated with refcount 1, then
aca_get() bumps it to 2 to keep it alive across the unlocked region.
It is published to idev->ac_list under idev->lock, but
ipv6_add_acaddr_hash() runs after write_unlock_bh(). A concurrent
teardown (ipv6_ac_destroy_dev() from addrconf_ifdown(), under RTNL)
can slip into that window:
CPU0 __ipv6_dev_ac_inc CPU1 ipv6_ac_destroy_dev (RTNL)
------------------------------ ------------------------------------
aca_alloc() refcnt 1
aca_get() refcnt 2
write_lock_bh(idev->lock)
add aca to ac_list
write_unlock_bh(idev->lock)
write_lock_bh(idev->lock)
pull aca off ac_list
write_unlock_bh(idev->lock)
ipv6_del_acaddr_hash(aca)
hlist_del_init_rcu() is a no-op,
aca is not in the hash yet
aca_put() refcnt 2->1
ipv6_add_acaddr_hash(aca)
aca now inserted into the hash
aca_put() refcnt 1->0
call_rcu(aca_free_rcu) -> kfree(aca)
The hash removal becomes a no-op because the insertion has not
happened yet, so once CPU0 inserts and drops the last reference, the
aca is freed while still linked in inet6_acaddr_lst[], and readers
dereference freed memory after the slab slot is reused.
This window opened once RTNL stopped serializing the join path against
device teardown. Move ipv6_add_acaddr_hash() inside the idev->lock
section so the ac_list and hash insertions are atomic with respect to
teardown: a racing remover now either misses the aca entirely or finds
it in both lists.
acaddr_hash_lock is now nested under idev->lock, which is acquired in
softirq context, so switch all acaddr_hash_lock sites to spin_lock_bh()
to avoid the irq lock inversion reported in [2].
[1] https://syzkaller.appspot.com/bug?extid=a01df04303c131efbf3a
[2] https://lore.kernel.org/netdev/6a194ef7.ba3b1513.1890b4.0000.GAE@google.com/
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基金会开源的操作系统Linux所使用的内核。 Linux kernel 6.17版本存在安全漏洞，该漏洞源于在IPv6 anycast地址处理中，由于在地广播地址（aca）插入全局哈希表时未在idev->lock保护下进行，导致释放后重用。
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-2026-53259 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
AI 生成 POC
高级
未找到公开 POC。
登录以生成 AI POC三、漏洞 CVE-2026-53259 的情报信息
请登录查看更多情报信息。
CVE-2026-53259 补丁与修复 (3)
同批安全公告 · Linux · 2026-06-25 · 共 146 条
| CVE-2026-53175 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53176 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53228 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53221 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53246 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53247 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53151 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53260 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53216 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53215 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53131 | 9.4 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53225 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53224 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53186 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53159 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-53198 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-53240 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-53275 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-53188 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-53171 | 8.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 146 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-53259
暂无评论