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CVE-2026-23388— Squashfs: check metadata block offset is within range

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，该漏洞源于元数据块偏移量验证不足，可能导致越界访问。

AI Predicted 7.8 Difficulty: Moderate EPSS 0.12% · P2

Possible ATT&CK Techniques 1 AI

T1212 · Exploitation for Credential Access

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux f400e12656ab518be107febfe2315fb1eab5a342< 60f679f643f3f36a8571ea585e4ce5d93ef952b5 affected
f400e12656ab518be107febfe2315fb1eab5a342< 3f68a9457a6190814377577374da75f872e0a013 affected
f400e12656ab518be107febfe2315fb1eab5a342< 0c8ab092aec3ac4294940054772d30b511b16713 affected
f400e12656ab518be107febfe2315fb1eab5a342< 6b847d65f5b0065e02080c61fad93d57d6686383 affected
f400e12656ab518be107febfe2315fb1eab5a342< 9e9fa5ad37c9cbad73c165c7ff1e76e650825e7c affected
f400e12656ab518be107febfe2315fb1eab5a342< 01ee0bcc29864b78249308e8b35042b09bbf5fe3 affected
f400e12656ab518be107febfe2315fb1eab5a342< 3b9499e7d677dd4366239a292238489a804936b2 affected
f400e12656ab518be107febfe2315fb1eab5a342< fdb24a820a5832ec4532273282cbd4f22c291a0d affected
… +10 more rows
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I. Basic Information for CVE-2026-23388

Vulnerability Information
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Vulnerability Title
Squashfs: check metadata block offset is within range
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: Squashfs: check metadata block offset is within range Syzkaller reports a "general protection fault in squashfs_copy_data" This is ultimately caused by a corrupted index look-up table, which produces a negative metadata block offset. This is subsequently passed to squashfs_copy_data (via squashfs_read_metadata) where the negative offset causes an out of bounds access. The fix is to check that the offset is within range in squashfs_read_metadata. This will trap this and other cases.
Source: CVE Program / CVE List V5
CVSS Information
N/A
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，该漏洞源于元数据块偏移量验证不足，可能导致越界访问。
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 f400e12656ab518be107febfe2315fb1eab5a342 ~ 60f679f643f3f36a8571ea585e4ce5d93ef952b5 -
Linux Linux 2.6.29 -

II. Public POCs for CVE-2026-23388

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III. Intelligence Information for CVE-2026-23388

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Patches & Fixes for CVE-2026-23388 (6)

Same Patch Batch · Linux · 2026-03-25 · 116 CVEs total

CVE-2026-23395 8.8 HIGH Bluetooth: L2CAP: Fix accepting multiple L2CAP_ECRED_CONN_REQ
CVE-2026-31788 8.2 HIGH xen/privcmd: restrict usage in unprivileged domU
CVE-2026-23340 7.8 HIGH net: sched: avoid qdisc_reset_all_tx_gt() vs dequeue race for lockless qdiscs
CVE-2026-23336 7.8 HIGH wifi: cfg80211: cancel rfkill_block work in wiphy_unregister()
CVE-2026-23350 7.8 HIGH drm/xe/queue: Call fini on exec queue creation fail
CVE-2026-23351 7.8 HIGH netfilter: nft_set_pipapo: split gc into unlink and reclaim phase
CVE-2026-23317 7.8 HIGH drm/vmwgfx: Return the correct value in vmw_translate_ptr functions
CVE-2026-23306 7.8 HIGH scsi: pm8001: Fix use-after-free in pm8001_queue_command()
CVE-2026-23372 7.8 HIGH nfc: rawsock: cancel tx_work before socket teardown
CVE-2026-23378 7.8 HIGH net/sched: act_ife: Fix metalist update behavior
CVE-2026-23383 7.8 HIGH bpf, arm64: Force 8-byte alignment for JIT buffer to prevent atomic tearing
CVE-2026-23391 7.8 HIGH netfilter: xt_CT: drop pending enqueued packets on template removal
CVE-2026-23392 7.8 HIGH netfilter: nf_tables: release flowtable after rcu grace period on error
CVE-2026-23393 7.8 HIGH bridge: cfm: Fix race condition in peer_mep deletion
CVE-2026-23280 7.8 HIGH accel/amdxdna: Prevent ubuf size overflow
CVE-2026-23288 7.8 HIGH accel/amdxdna: Fix out-of-bounds memset in command slot handling
CVE-2026-23364 7.4 HIGH ksmbd: Compare MACs in constant time
CVE-2026-23294 7.0 HIGH bpf: Fix race in devmap on PREEMPT_RT
CVE-2026-23352 x86/efi: defer freeing of boot services memory
CVE-2026-23354 x86/fred: Correct speculative safety in fred_extint()

Showing top 20 of 116 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-23388

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