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    <link>https://cve.radiocsirt.org</link>
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    <lastBuildDate>Thu, 08 Oct 2026 19:17:30 +0000</lastBuildDate>
    <item>
      <title>CVE-2025-21692 — net: sched: fix ets qdisc OOB Indexing</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2025-21692</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux, Siemens RUGGEDCOM RST2428P, Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family, Siemens SCALANCE XCM-/XRM-/XCH-/XRH-300 family, Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;net: sched: fix ets qdisc OOB Indexing&lt;/p&gt;
&lt;p&gt;Haowei Yan &amp;lt;g1042620637@gmail.com&amp;gt; found that ets_class_from_arg() can
index an Out-Of-Bound class in ets_class_from_arg() when passed clid of
0. The overflow may cause local privilege escalation.&lt;/p&gt;
&lt;p&gt;[   18.852298] ------------[ cut here ]------------
 [   18.853271] UBSAN: array-index-out-of-bounds in net/sched/sch_ets.c:93:20
 [   18.853743] index 18446744073709551615 is out of range for type &amp;#39;ets_class [16]&amp;#39;
 [   18.854254] CPU: 0 UID: 0 PID: 1275 Comm: poc Not tainted 6.12.6-dirty #17
 [   18.854821] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014
 [   18.856532] Call Trace:
 [   18.857441]  &amp;lt;TASK&amp;gt;
 [   18.858227]  dump_stack_lvl+0xc2/0xf0
 [   18.859607]  dump_stack+0x10/0x20
 [   18.860908]  __ubsan_handle_out_of_bounds+0xa7/0xf0
 [   18.864022]  ets_class_change+0x3d6/0x3f0
 [   18.864322]  tc_ctl_tclass+0x251/0x910
 [   18.864587]  ? lock_acquire+0x5e/0x140
 [   18.865113]  ? __mutex_lock+0x9c/0xe70
 [   18.866009]  ? __mutex_lock+0xa34/0xe70
 [   18.866401]  rtnetlink_rcv_msg+0x170/0x6f0
 [   18.866806]  ? __lock_acquire+0x578/0xc10
 [   18.867184]  ? __pfx_rtnetlink_rcv_msg+0x10/0x10
 [   18.867503]  netlink_rcv_skb+0x59/0x110
 [   18.867776]  rtnetlink_rcv+0x15/0x30
 [   18.868159]  netlink_unicast+0x1c3/0x2b0
 [   18.868440]  netlink_sendmsg+0x239/0x4b0
 [   18.868721]  ____sys_sendmsg+0x3e2/0x410
 [   18.869012]  ___sys_send…&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux, Siemens RUGGEDCOM RST2428P, Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family, Siemens SCALANCE XCM-/XRM-/XCH-/XRH-300 family, Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;net: sched: fix ets qdisc OOB Indexing&lt;/p&gt;
&lt;p&gt;Haowei Yan &amp;lt;g1042620637@gmail.com&amp;gt; found that ets_class_from_arg() can
index an Out-Of-Bound class in ets_class_from_arg() when passed clid of
0. The overflow may cause local privilege escalation.&lt;/p&gt;
&lt;p&gt;[   18.852298] ------------[ cut here ]------------
 [   18.853271] UBSAN: array-index-out-of-bounds in net/sched/sch_ets.c:93:20
 [   18.853743] index 18446744073709551615 is out of range for type &amp;#39;ets_class [16]&amp;#39;
 [   18.854254] CPU: 0 UID: 0 PID: 1275 Comm: poc Not tainted 6.12.6-dirty #17
 [   18.854821] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014
 [   18.856532] Call Trace:
 [   18.857441]  &amp;lt;TASK&amp;gt;
 [   18.858227]  dump_stack_lvl+0xc2/0xf0
 [   18.859607]  dump_stack+0x10/0x20
 [   18.860908]  __ubsan_handle_out_of_bounds+0xa7/0xf0
 [   18.864022]  ets_class_change+0x3d6/0x3f0
 [   18.864322]  tc_ctl_tclass+0x251/0x910
 [   18.864587]  ? lock_acquire+0x5e/0x140
 [   18.865113]  ? __mutex_lock+0x9c/0xe70
 [   18.866009]  ? __mutex_lock+0xa34/0xe70
 [   18.866401]  rtnetlink_rcv_msg+0x170/0x6f0
 [   18.866806]  ? __lock_acquire+0x578/0xc10
 [   18.867184]  ? __pfx_rtnetlink_rcv_msg+0x10/0x10
 [   18.867503]  netlink_rcv_skb+0x59/0x110
 [   18.867776]  rtnetlink_rcv+0x15/0x30
 [   18.868159]  netlink_unicast+0x1c3/0x2b0
 [   18.868440]  netlink_sendmsg+0x239/0x4b0
 [   18.868721]  ____sys_sendmsg+0x3e2/0x410
 [   18.869012]  ___sys_send…&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://cve.radiocsirt.org/vuln/cve-2025-21692</guid>
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