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    <lastBuildDate>Wed, 30 Sep 2026 07:56:09 +0000</lastBuildDate>
    <item>
      <title>CVE-2024-40899 — cachefiles: fix slab-use-after-free in cachefiles_ondemand_get_fd()</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2024-40899</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;cachefiles: fix slab-use-after-free in cachefiles_ondemand_get_fd()&lt;/p&gt;
&lt;p&gt;We got the following issue in a fuzz test of randomly issuing the restore
command:&lt;/p&gt;
&lt;p&gt;==================================================================
BUG: KASAN: slab-use-after-free in cachefiles_ondemand_daemon_read+0x609/0xab0
Write of size 4 at addr ffff888109164a80 by task ondemand-04-dae/4962&lt;/p&gt;
&lt;p&gt;CPU: 11 PID: 4962 Comm: ondemand-04-dae Not tainted 6.8.0-rc7-dirty #542
Call Trace:
 kasan_report+0x94/0xc0
 cachefiles_ondemand_daemon_read+0x609/0xab0
 vfs_read+0x169/0xb50
 ksys_read+0xf5/0x1e0&lt;/p&gt;
&lt;p&gt;Allocated by task 626:
 __kmalloc+0x1df/0x4b0
 cachefiles_ondemand_send_req+0x24d/0x690
 cachefiles_create_tmpfile+0x249/0xb30
 cachefiles_create_file+0x6f/0x140
 cachefiles_look_up_object+0x29c/0xa60
 cachefiles_lookup_cookie+0x37d/0xca0
 fscache_cookie_state_machine+0x43c/0x1230
 [...]&lt;/p&gt;
&lt;p&gt;Freed by task 626:
 kfree+0xf1/0x2c0
 cachefiles_ondemand_send_req+0x568/0x690
 cachefiles_create_tmpfile+0x249/0xb30
 cachefiles_create_file+0x6f/0x140
 cachefiles_look_up_object+0x29c/0xa60
 cachefiles_lookup_cookie+0x37d/0xca0
 fscache_cookie_state_machine+0x43c/0x1230
 [...]
==================================================================&lt;/p&gt;
&lt;p&gt;Following is the process that triggers the issue:&lt;/p&gt;
&lt;p&gt;mount  |   daemon_thread1    |    daemon_thread2
------------------------------------------------------------
 cachefiles_ondemand_init_object
  cachefiles_ondemand_se…&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;cachefiles: fix slab-use-after-free in cachefiles_ondemand_get_fd()&lt;/p&gt;
&lt;p&gt;We got the following issue in a fuzz test of randomly issuing the restore
command:&lt;/p&gt;
&lt;p&gt;==================================================================
BUG: KASAN: slab-use-after-free in cachefiles_ondemand_daemon_read+0x609/0xab0
Write of size 4 at addr ffff888109164a80 by task ondemand-04-dae/4962&lt;/p&gt;
&lt;p&gt;CPU: 11 PID: 4962 Comm: ondemand-04-dae Not tainted 6.8.0-rc7-dirty #542
Call Trace:
 kasan_report+0x94/0xc0
 cachefiles_ondemand_daemon_read+0x609/0xab0
 vfs_read+0x169/0xb50
 ksys_read+0xf5/0x1e0&lt;/p&gt;
&lt;p&gt;Allocated by task 626:
 __kmalloc+0x1df/0x4b0
 cachefiles_ondemand_send_req+0x24d/0x690
 cachefiles_create_tmpfile+0x249/0xb30
 cachefiles_create_file+0x6f/0x140
 cachefiles_look_up_object+0x29c/0xa60
 cachefiles_lookup_cookie+0x37d/0xca0
 fscache_cookie_state_machine+0x43c/0x1230
 [...]&lt;/p&gt;
&lt;p&gt;Freed by task 626:
 kfree+0xf1/0x2c0
 cachefiles_ondemand_send_req+0x568/0x690
 cachefiles_create_tmpfile+0x249/0xb30
 cachefiles_create_file+0x6f/0x140
 cachefiles_look_up_object+0x29c/0xa60
 cachefiles_lookup_cookie+0x37d/0xca0
 fscache_cookie_state_machine+0x43c/0x1230
 [...]
==================================================================&lt;/p&gt;
&lt;p&gt;Following is the process that triggers the issue:&lt;/p&gt;
&lt;p&gt;mount  |   daemon_thread1    |    daemon_thread2
------------------------------------------------------------
 cachefiles_ondemand_init_object
  cachefiles_ondemand_se…&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://vulnerability.circl.lu/vuln/cve-2024-40899</guid>
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