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CVE-2024-50271— signal: restore the override_rlimit logic

EPSS 0.01% · P2
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I. Basic Information for CVE-2024-50271

Vulnerability Information
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Vulnerability Title
signal: restore the override_rlimit logic
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: signal: restore the override_rlimit logic Prior to commit d64696905554 ("Reimplement RLIMIT_SIGPENDING on top of ucounts") UCOUNT_RLIMIT_SIGPENDING rlimit was not enforced for a class of signals. However now it's enforced unconditionally, even if override_rlimit is set. This behavior change caused production issues. For example, if the limit is reached and a process receives a SIGSEGV signal, sigqueue_alloc fails to allocate the necessary resources for the signal delivery, preventing the signal from being delivered with siginfo. This prevents the process from correctly identifying the fault address and handling the error. From the user-space perspective, applications are unaware that the limit has been reached and that the siginfo is effectively 'corrupted'. This can lead to unpredictable behavior and crashes, as we observed with java applications. Fix this by passing override_rlimit into inc_rlimit_get_ucounts() and skip the comparison to max there if override_rlimit is set. This effectively restores the old behavior.
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，该漏洞源于存在override_rlimit逻辑恢复问题。
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 d64696905554e919321e31afc210606653b8f6a4 ~ 012f4d5d25e9ef92ee129bd5aa7aa60f692681e1 -
LinuxLinux 5.14 -

II. Public POCs for CVE-2024-50271

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III. Intelligence Information for CVE-2024-50271

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Same Patch Batch · Linux · 2024-11-19 · 88 CVEs total

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CVE-2024-53059wifi: iwlwifi: mvm: Fix response handling in iwl_mvm_send_recovery_cmd()
CVE-2024-53060drm/amdgpu: prevent NULL pointer dereference if ATIF is not supported
CVE-2024-53061media: s5p-jpeg: prevent buffer overflows
CVE-2024-53062media: mgb4: protect driver against spectre
CVE-2024-53064idpf: fix idpf_vc_core_init error path
CVE-2024-53063media: dvbdev: prevent the risk of out of memory access
CVE-2024-53066nfs: Fix KMSAN warning in decode_getfattr_attrs()
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Showing top 20 of 88 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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