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CVE-2022-49560— exfat: check if cluster num is valid

EPSS 0.07% · P22

Affected Version Matrix 12

VendorProductVersion RangeStatus
LinuxLinux1e49a94cf707204b66a3fb242f2814712c941f52< 82f723b8a5adf497f9e34c702a30ca7298615654affected
1e49a94cf707204b66a3fb242f2814712c941f52< c504167adc3248095a905fa0700a9693897cb5edaffected
1e49a94cf707204b66a3fb242f2814712c941f52< 7c58b14b6f9cde9f69e7fa053ab73f6e013a7131affected
1e49a94cf707204b66a3fb242f2814712c941f52< 2193286402df2d9c53294f7a858d5e6fd7346e08affected
1e49a94cf707204b66a3fb242f2814712c941f52< 64ba4b15e5c045f8b746c6da5fc9be9a6b00b61daffected
5.7affected
< 5.7unaffected
5.10.120≤ 5.10.*unaffected
… +4 more rows
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I. Basic Information for CVE-2022-49560

Vulnerability Information
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Vulnerability Title
exfat: check if cluster num is valid
Source: NVD (National Vulnerability Database)
Vulnerability Description
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 mm/kasan/report.c:419 [inline] kasan_report+0x1a4/0x1f0 mm/kasan/report.c:436 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:309 exfat_clear_bitmap+0x147/0x490 fs/exfat/balloc.c:174 exfat_free_cluster+0x25a/0x4a0 fs/exfat/fatent.c:181 __exfat_truncate+0x99e/0xe00 fs/exfat/file.c:217 exfat_truncate+0x11b/0x4f0 fs/exfat/file.c:243 exfat_setattr+0xa03/0xd40 fs/exfat/file.c:339 notify_change+0xb76/0xe10 fs/attr.c:336 do_truncate+0x1ea/0x2d0 fs/open.c:65 Move the is_valid_cluster() helper from fatent.c to a common header to make it reusable in other *.c files. And add is_valid_cluster() to validate if cluster number is within valid range in exfat_clear_bitmap() and exfat_set_bitmap().
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于exfat未验证簇号有效性，可能导致越界读取。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux 1e49a94cf707204b66a3fb242f2814712c941f52 ~ 82f723b8a5adf497f9e34c702a30ca7298615654 -
LinuxLinux 5.7 -

II. Public POCs for CVE-2022-49560

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III. Intelligence Information for CVE-2022-49560

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Same Patch Batch · Linux · 2025-02-26 · 706 CVEs total

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CVE-2022-49490drm/msm/mdp5: Return error code in mdp5_pipe_release when deadlock is detected
CVE-2022-49491drm/rockchip: vop: fix possible null-ptr-deref in vop_bind()
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CVE-2022-49508HID: elan: Fix potential double free in elan_input_configured
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CVE-2022-49505NFC: NULL out the dev->rfkill to prevent UAF
CVE-2022-49502media: rga: fix possible memory leak in rga_probe
CVE-2022-49499drm/msm: Fix null pointer dereferences without iommu
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Showing top 20 of 706 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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