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CVE-2024-42255— tpm: Use auth only after NULL check in tpm_buf_check_hmac_response()

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，该漏洞源于空指针取消引用。

AI Predicted 5.5 Difficulty: Easy EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1211 · Exploitation for Stealth

Affected Version Matrix 6

VendorProduct Version RangeStatus
Linux Linux 7ca110f2679b7d1f3ac1afc90e6ffbf0af3edf0d< b9afbb9a0c734197c59c43610071041044bf1562 affected
7ca110f2679b7d1f3ac1afc90e6ffbf0af3edf0d< 7dc357d343f134bf59815ff6098b93503ec8a23b affected
6.10 affected
< 6.10 unaffected
6.10.1≤ 6.10.* unaffected
6.11≤ * unaffected
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I. Basic Information for CVE-2024-42255

Vulnerability Information
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Vulnerability Title
tpm: Use auth only after NULL check in tpm_buf_check_hmac_response()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: tpm: Use auth only after NULL check in tpm_buf_check_hmac_response() Dereference auth after NULL check in tpm_buf_check_hmac_response(). Otherwise, unless tpm2_sessions_init() was called, a call can cause NULL dereference, when TCG_TPM2_HMAC is enabled. [jarkko: adjusted the commit message.]
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，该漏洞源于空指针取消引用。
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 7ca110f2679b7d1f3ac1afc90e6ffbf0af3edf0d ~ b9afbb9a0c734197c59c43610071041044bf1562 -
Linux Linux 6.10 -

II. Public POCs for CVE-2024-42255

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III. Intelligence Information for CVE-2024-42255

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Patches & Fixes for CVE-2024-42255 (2)

Same Patch Batch · Linux · 2024-08-08 · 7 CVEs total

CVE-2024-42253 7.8 HIGH gpio: pca953x: fix pca953x_irq_bus_sync_unlock race
CVE-2024-42256 7.5 HIGH cifs: Fix server re-repick on subrequest retry
CVE-2024-42257 ext4: use memtostr_pad() for s_volume_name
CVE-2024-42254 io_uring: fix error pbuf checking
CVE-2024-42252 closures: Change BUG_ON() to WARN_ON()
CVE-2024-42251 mm: page_ref: remove folio_try_get_rcu()

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-42255

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