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CVE-2021-47478— isofs: Fix out of bound access for corrupted isofs image

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，该漏洞源于当 isofs 图像被损坏时， isofs_read_inode函数可以读取超出缓冲区末尾的数据。

CVSS 9.1 · Critical EPSS 0.69% · P52

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 156ce5bb6cc43a80a743810199defb1dc3f55b7f affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 9ec33a9b8790c212cc926a88c5e2105f97f3f57e affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< afbd40f425227e661d991757e11cc4db024e761f affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< b0ddff8d68f2e43857a84dce54c3deab181c8ae1 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 6e80e9314f8bb52d9eabe1907698718ff01120f5 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 86d4aedcbc69c0f84551fb70f953c24e396de2d7 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< b2fa1f52d22c5455217b294629346ad23a744945 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< e7fb722586a2936b37bdff096c095c30ca06404d affected
… +12 more rows
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I. Basic Information for CVE-2021-47478

Vulnerability Information
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Vulnerability Title
isofs: Fix out of bound access for corrupted isofs image
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: isofs: Fix out of bound access for corrupted isofs image When isofs image is suitably corrupted isofs_read_inode() can read data beyond the end of buffer. Sanity-check the directory entry length before using it.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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，该漏洞源于当 isofs 图像被损坏时， isofs_read_inode函数可以读取超出缓冲区末尾的数据。
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 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ~ 156ce5bb6cc43a80a743810199defb1dc3f55b7f -
Linux Linux 2.6.12 -

II. Public POCs for CVE-2021-47478

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III. Intelligence Information for CVE-2021-47478

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Other References for CVE-2021-47478 (8)

Same Patch Batch · Linux · 2024-05-22 · 63 CVEs total

CVE-2021-47496 9.8 CRITICAL net/tls: Fix flipped sign in tls_err_abort() calls
CVE-2021-47450 8.8 HIGH KVM: arm64: Fix host stage-2 PGD refcount
CVE-2021-47433 8.1 HIGH btrfs: fix abort logic in btrfs_replace_file_extents
CVE-2021-47451 7.8 HIGH netfilter: xt_IDLETIMER: fix panic that occurs when timer_type has garbage value
CVE-2021-47459 7.8 HIGH can: j1939: j1939_netdev_start(): fix UAF for rx_kref of j1939_priv
CVE-2021-47461 7.8 HIGH userfaultfd: fix a race between writeprotect and exit_mmap()
CVE-2021-47483 7.8 HIGH regmap: Fix possible double-free in regcache_rbtree_exit()
CVE-2021-47494 7.8 HIGH cfg80211: fix management registrations locking
CVE-2021-47493 7.8 HIGH ocfs2: fix race between searching chunks and release journal_head from buffer_head
CVE-2021-47492 7.8 HIGH mm, thp: bail out early in collapse_file for writeback page
CVE-2021-47447 7.8 HIGH drm/msm/a3xx: fix error handling in a3xx_gpu_init()
CVE-2021-47485 7.8 HIGH IB/qib: Protect from buffer overflow in struct qib_user_sdma_pkt fields
CVE-2021-47446 7.8 HIGH drm/msm/a4xx: fix error handling in a4xx_gpu_init()
CVE-2021-47448 7.5 HIGH mptcp: fix possible stall on recvmsg()
CVE-2021-47458 7.1 HIGH ocfs2: mount fails with buffer overflow in strlen
CVE-2021-47465 7.1 HIGH KVM: PPC: Book3S HV: Fix stack handling in idle_kvm_start_guest()
CVE-2021-47438 7.1 HIGH net/mlx5e: Fix memory leak in mlx5_core_destroy_cq() error path
CVE-2021-47479 staging: rtl8712: fix use-after-free in rtl8712_dl_fw
CVE-2021-47476 comedi: ni_usb6501: fix NULL-deref in command paths
CVE-2021-47474 comedi: vmk80xx: fix bulk-buffer overflow

Showing top 20 of 63 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2021-47478

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