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Review reviewHigh

CVE-2022-49014

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: net: tun: Fix use-after-free in tun_detach() syzbot reported use-after-free in tun_detach() [1]. This causes call trace like below: ================================================================== BUG: KASAN: use-after-free in notifier_call_chain+0x1ee/0x200 kernel/notifier.c:75 Read of size 8 at addr ffff88807324e2a8 by task syz-executor.0/3673 CPU: 0 PID: 3673 Comm: syz-executor.0 Not tainted 6.1.0-rc5-syzkaller-00044-gcc675d22e422 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2...

CVSS
7.8
EPSS
-
- percentile
CISA KEV
Not listed
Published
2024.10.22
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: net: tun: Fix use-after-free in tun_detach() syzbot reported use-after-free in tun_detach() [1]. This causes call trace like below: ================================================================== BUG: KASAN: use-after-free in notifier_call_chain+0x1ee/0x200 kernel/notifier.c:75 Read of size 8 at addr ffff88807324e2a8 by task syz-executor.0/3673 CPU: 0 PID: 3673 Comm: syz-executor.0 Not tainted 6.1.0-rc5-syzkaller-00044-gcc675d22e422 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 83c1f36f9880814b24cdf6c2f91f66f61db65326 < 1f23f1890d91812c35d32eab1b49621b6d32dc7b, >= 83c1f36f9880814b24cdf6c2f91f66f61db65326 < 16c244bc65d1175775325ec0489a5a5c830e02c7, >= 83c1f36f9880814b24cdf6c2f91f66f61db65326 < 5f442e1d403e0496bacb74a58e2be7f500695e6f, >= 83c1f36f9880814b24cdf6c2f91f66f61db65326 < 04b995e963229501401810dab89dc73e7f12d054, >= 83c1f36f9880814b24cdf6c2f91f66f61db65326 < 4cde8da2d814a3b7b176db81922d4ddaad7c0f0e, >= 83c1f36f9880814b24cdf6c2f91f66f61db65326 < 5daadc86f27ea4d691e2131c04310d0418c6cd12, >= 4.17, >= 4.17 < 4.19.268, >= 4.20 < 5.4.226, >= 5.5 < 5.10.158, >= 5.11 < 5.15.82, >= 5.16 < 6.0.12, 6.1
Fixed versions
4.19.268, 5.4.226, 5.10.158, 5.15.82, 6.0.12

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux 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