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Review reviewHigh

CVE-2023-52572

Linux Linux, debian linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: cifs: Fix UAF in cifs_demultiplex_thread() There is a UAF when xfstests on cifs: BUG: KASAN: use-after-free in smb2_is_network_name_deleted+0x27/0x160 Read of size 4 at addr ffff88810103fc08 by task cifsd/923 CPU: 1 PID: 923 Comm: cifsd Not tainted 6.1.0-rc4+ #45 ... Call Trace: <TASK> dump_stack_lvl+0x34/0x44 print_report+0x171/0x472 kasan_report+0xad/0x130 kasan_check_range+0x145/0x1a0 smb2_is_network_name_deleted+0x27/0x160 cifs_demultiplex_thread.cold+0x172/0x5a4 kthread+0x165/0x1a0 ret_from_fork+0x1f/0x30 </TASK> Alloc...

CVSS
7.8
EPSS
0.23%
14.0% percentile
CISA KEV
Not listed
Published
2024.03.03
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.23%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: cifs: Fix UAF in cifs_demultiplex_thread() There is a UAF when xfstests on cifs: BUG: KASAN: use-after-free in smb2_is_network_name_deleted+0x27/0x160 Read of size 4 at addr ffff88810103fc08 by task cifsd/923 CPU: 1 PID: 923 Comm: cifsd Not tainted 6.1.0-rc4+ #45 ... Call Trace: <TASK> dump_stack_lvl+0x34/0x44 print_report+0x171/0x472 kasan_report+0xad/0x130 kasan_check_range+0x145/0x1a0 smb2_is_network_name_deleted+0x27/0x160 cifs_demultiplex_thread.cold+0x172/0x5a4 kthread+0x165/0x1a0 ret_from_fork+0x1f/0x30 </TASK> Alloc...

Affected product and versions

Product
Linux Linux, debian linux, linux kernel
Affected versions
>= ec637e3ffb6b978143652477c7c5f96c9519b691 < fe87e2d0e6265859c659a3ef1e2559a83c5e8e68, >= ec637e3ffb6b978143652477c7c5f96c9519b691 < 99960d282fba6634fa758df4124cb73ef8a77d8a, >= ec637e3ffb6b978143652477c7c5f96c9519b691 < ed3b36f351d97dacb62cd0f399e8cf79f73bd30a, >= ec637e3ffb6b978143652477c7c5f96c9519b691 < 908b3b5e97d25e879de3d1f172a255665491c2c3, >= ec637e3ffb6b978143652477c7c5f96c9519b691 < 76569e3819e0bb59fc19b1b8688b017e627c268a, >= ec637e3ffb6b978143652477c7c5f96c9519b691 < d527f51331cace562393a8038d870b3e9916686f, >= 2.6.16, 11.0, >= 2.6.16 < 5.4.297, >= 5.5 < 5.10.237, >= 5.11 < 5.15.181, >= 5.16 < 6.1.56, >= 6.2 < 6.5.6, 6.6
Fixed versions
5.4.297, 5.10.237, 5.15.181, 6.1.56, 6.5.6

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, debian linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-416
CVE-2023-52572 — Linux Linux, debian linux, linux kernel | SECUFOCUS NOW