{"timestamp":"2024-02-26T18:14:41.496128Z","id":"CVE-2023-52468","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}

[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["drivers/base/class.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"dcfbb67e48a2becfce7990386e985b9c45098ee5","lessThan":"b57196a5ec5e4c0ffecde8348b085b778c7dce04","versionType":"git","status":"affected"},{"version":"dcfbb67e48a2becfce7990386e985b9c45098ee5","lessThan":"0f1486dafca3398c4c46b9f6e6452fa27e73b559","versionType":"git","status":"affected"},{"version":"dcfbb67e48a2becfce7990386e985b9c45098ee5","lessThan":"93ec4a3b76404bce01bd5c9032bef5df6feb1d62","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["drivers/base/class.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"6.4","status":"affected"},{"version":"0","lessThan":"6.4","versionType":"semver","status":"unaffected"},{"version":"6.6.14","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.7.2","lessThanOrEqual":"6.7.*","versionType":"semver","status":"unaffected"},{"version":"6.8","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]

https://git.kernel.org/stable/c/0f1486dafca3398c4c46b9f6e6452fa27e73b559

https://git.kernel.org/stable/c/93ec4a3b76404bce01bd5c9032bef5df6feb1d62

https://git.kernel.org/stable/c/b57196a5ec5e4c0ffecde8348b085b778c7dce04

NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NIST CWE-416

OR
     *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.4.0 up to (excluding) 6.6.14
     *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7.0 up to (excluding) 6.7.2

https://git.kernel.org/stable/c/0f1486dafca3398c4c46b9f6e6452fa27e73b559 No Types Assigned

https://git.kernel.org/stable/c/0f1486dafca3398c4c46b9f6e6452fa27e73b559 Patch

https://git.kernel.org/stable/c/93ec4a3b76404bce01bd5c9032bef5df6feb1d62 No Types Assigned

https://git.kernel.org/stable/c/93ec4a3b76404bce01bd5c9032bef5df6feb1d62 Patch

https://git.kernel.org/stable/c/b57196a5ec5e4c0ffecde8348b085b778c7dce04 No Types Assigned

https://git.kernel.org/stable/c/b57196a5ec5e4c0ffecde8348b085b778c7dce04 Patch

In the Linux kernel, the following vulnerability has been resolved:

class: fix use-after-free in class_register()

The lock_class_key is still registered and can be found in
lock_keys_hash hlist after subsys_private is freed in error
handler path.A task who iterate over the lock_keys_hash
later may cause use-after-free.So fix that up and unregister
the lock_class_key before kfree(cp).

On our platform, a driver fails to kset_register because of
creating duplicate filename '/class/xxx'.With Kasan enabled,
it prints a invalid-access bug report.

KASAN bug report:

BUG: KASAN: invalid-access in lockdep_register_key+0x19c/0x1bc
Write of size 8 at addr 15ffff808b8c0368 by task modprobe/252
Pointer tag: [15], memory tag: [fe]

CPU: 7 PID: 252 Comm: modprobe Tainted: G        W
 6.6.0-mainline-maybe-dirty #1

Call trace:
dump_backtrace+0x1b0/0x1e4
show_stack+0x2c/0x40
dump_stack_lvl+0xac/0xe0
print_report+0x18c/0x4d8
kasan_report+0xe8/0x148
__hwasan_store8_noabort+0x88/0x98
lockdep_register_key+0x19c/0x1bc
class_register+0x94/0x1ec
init_module+0xbc/0xf48 [rfkill]
do_one_initcall+0x17c/0x72c
do_init_module+0x19c/0x3f8
...
Memory state around the buggy address:
ffffff808b8c0100: 8a 8a 8a 8a 8a 8a 8a 8a 8a 8a 8a 8a 8a 8a 8a 8a
ffffff808b8c0200: 8a 8a 8a 8a 8a 8a 8a 8a fe fe fe fe fe fe fe fe
>ffffff808b8c0300: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
                                     ^
ffffff808b8c0400: 03 03 03 03 03 03 03 03 03 03 03 03 03 03 03 03

As CONFIG_KASAN_GENERIC is not set, Kasan reports invalid-access
not use-after-free here.In this case, modprobe is manipulating
the corrupted lock_keys_hash hlish where lock_class_key is already
freed before.

It's worth noting that this only can happen if lockdep is enabled,
which is not true for normal system.

Linux https://git.kernel.org/stable/c/0f1486dafca3398c4c46b9f6e6452fa27e73b559 [No types assigned]

Linux https://git.kernel.org/stable/c/93ec4a3b76404bce01bd5c9032bef5df6feb1d62 [No types assigned]

Linux https://git.kernel.org/stable/c/b57196a5ec5e4c0ffecde8348b085b778c7dce04 [No types assigned]