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Review reviewHigh

CVE-2022-49560

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: exfat: check if cluster num is valid Syzbot reported slab-out-of-bounds read in exfat_clear_bitmap. This was triggered by reproducer calling truncute with size 0, which causes the following trace: BUG: KASAN: slab-out-of-bounds in exfat_clear_bitmap+0x147/0x490 fs/exfat/balloc.c:174 Read of size 8 at addr ffff888115aa9508 by task syz-executor251/365 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack_lvl+0x1e2/0x24b lib/dump_stack.c:118 print_address_description+0x81/0x3c0 mm/kasan/report.c:233 __kasan_report m...

CVSS
7.1
EPSS
0.29%
21.3% percentile
CISA KEV
Not listed
Published
2025.02.26
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.29%
Technical severityCVSS 7.1

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: exfat: check if cluster num is valid Syzbot reported slab-out-of-bounds read in exfat_clear_bitmap. This was triggered by reproducer calling truncute with size 0, which causes the following trace: BUG: KASAN: slab-out-of-bounds in exfat_clear_bitmap+0x147/0x490 fs/exfat/balloc.c:174 Read of size 8 at addr ffff888115aa9508 by task syz-executor251/365 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack_lvl+0x1e2/0x24b lib/dump_stack.c:118 print_address_description+0x81/0x3c0 mm/kasan/report.c:233 __kasan_report m...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 1e49a94cf707204b66a3fb242f2814712c941f52 < 82f723b8a5adf497f9e34c702a30ca7298615654, >= 1e49a94cf707204b66a3fb242f2814712c941f52 < c504167adc3248095a905fa0700a9693897cb5ed, >= 1e49a94cf707204b66a3fb242f2814712c941f52 < 7c58b14b6f9cde9f69e7fa053ab73f6e013a7131, >= 1e49a94cf707204b66a3fb242f2814712c941f52 < 2193286402df2d9c53294f7a858d5e6fd7346e08, >= 1e49a94cf707204b66a3fb242f2814712c941f52 < 64ba4b15e5c045f8b746c6da5fc9be9a6b00b61d, >= 5.7, >= 5.7 < 5.10.120, >= 5.11 < 5.15.45, >= 5.16 < 5.17.13, >= 5.18 < 5.18.2
Fixed versions
5.10.120, 5.15.45, 5.17.13, 5.18.2

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:N/A:H
CWE
CWE-125