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CVE-2022-49343— ext4: avoid cycles in directory h-tree

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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ext4未验证目录h-tree中的块号是否唯一，可能导致内存损坏。

CVSS 7.8 · High EPSS 0.29% · P21

Possible ATT&CK Techniques 1 AI

T1211 · Exploitation for Stealth

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux ac27a0ec112a089f1a5102bc8dffc79c8c815571< 24b8206fec1db21d7e82f21f0b2ff5e5672cf5b3 affected
ac27a0ec112a089f1a5102bc8dffc79c8c815571< b3ad9ff6f06c1dc6abf7437691c88ca3d6da3ac0 affected
ac27a0ec112a089f1a5102bc8dffc79c8c815571< e157c8f87e8fac112d6c955e69a60cdb9bc80a60 affected
ac27a0ec112a089f1a5102bc8dffc79c8c815571< ff4cafa51762da3824881a9000ca421d4b78b138 affected
ac27a0ec112a089f1a5102bc8dffc79c8c815571< 3a3ce941645407cd0b0b7f01ad9e2ea3770f46cc affected
ac27a0ec112a089f1a5102bc8dffc79c8c815571< d5a16a6df2c16eaf4de04948553ef0089dee463f affected
ac27a0ec112a089f1a5102bc8dffc79c8c815571< 6084240bfc44bf265ab6ae7d96980469b05be0f1 affected
ac27a0ec112a089f1a5102bc8dffc79c8c815571< 3ba733f879c2a88910744647e41edeefbc0d92b2 affected
… +10 more rows
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I. Basic Information for CVE-2022-49343

Vulnerability Information
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Vulnerability Title
ext4: avoid cycles in directory h-tree
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ext4: avoid cycles in directory h-tree A maliciously corrupted filesystem can contain cycles in the h-tree stored inside a directory. That can easily lead to the kernel corrupting tree nodes that were already verified under its hands while doing a node split and consequently accessing unallocated memory. Fix the problem by verifying traversed block numbers are unique.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
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ext4未验证目录h-tree中的块号是否唯一，可能导致内存损坏。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux ac27a0ec112a089f1a5102bc8dffc79c8c815571 ~ 24b8206fec1db21d7e82f21f0b2ff5e5672cf5b3 -
Linux Linux 2.6.19 -

II. Public POCs for CVE-2022-49343

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III. Intelligence Information for CVE-2022-49343

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Patches & Fixes for CVE-2022-49343 (8)

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

CVE-2022-49280 9.8 CRITICAL NFSD: prevent underflow in nfssvc_decode_writeargs()
CVE-2022-49362 9.8 CRITICAL NFSD: Fix potential use-after-free in nfsd_file_put()
CVE-2022-49407 9.8 CRITICAL dlm: fix plock invalid read
CVE-2022-49561 9.8 CRITICAL netfilter: conntrack: re-fetch conntrack after insertion
CVE-2022-49356 9.8 CRITICAL SUNRPC: Trap RDMA segment overflows
CVE-2022-49418 9.8 CRITICAL NFSv4: Fix free of uninitialized nfs4_label on referral lookup.
CVE-2022-49260 9.8 CRITICAL crypto: hisilicon/sec - fix the aead software fallback for engine
CVE-2022-49094 9.8 CRITICAL net/tls: fix slab-out-of-bounds bug in decrypt_internal
CVE-2022-49093 9.8 CRITICAL skbuff: fix coalescing for page_pool fragment recycling
CVE-2022-49201 9.8 CRITICAL ibmvnic: fix race between xmit and reset
CVE-2022-49194 9.8 CRITICAL net: bcmgenet: Use stronger register read/writes to assure ordering
CVE-2022-49149 9.8 CRITICAL rxrpc: Fix call timer start racing with call destruction
CVE-2022-49058 9.1 CRITICAL cifs: potential buffer overflow in handling symlinks
CVE-2022-49519 8.8 HIGH ath10k: skip ath10k_halt during suspend for driver state RESTARTING
CVE-2022-49500 8.8 HIGH wl1251: dynamically allocate memory used for DMA
CVE-2022-49470 8.8 HIGH Bluetooth: btmtksdio: fix use-after-free at btmtksdio_recv_event
CVE-2022-49328 8.8 HIGH mt76: fix use-after-free by removing a non-RCU wcid pointer
CVE-2022-49479 8.8 HIGH mt76: fix tx status related use-after-free race on station removal
CVE-2022-49535 8.8 HIGH scsi: lpfc: Fix null pointer dereference after failing to issue FLOGI and PLOGI
CVE-2022-49114 8.8 HIGH scsi: libfc: Fix use after free in fc_exch_abts_resp()

Showing top 20 of 706 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2022-49343

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