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CVE-2024-39480— kdb: Fix buffer overflow during tab-complete

EPSS 0.02% · P6

Affected Version Matrix 18

VendorProductVersion RangeStatus
LinuxLinux5d5314d6795f3c1c0f415348ff8c51f7de042b77< fb824a99e148ff272a53d71d84122728b5f00992affected
5d5314d6795f3c1c0f415348ff8c51f7de042b77< ddd2972d8e2dee3b33e8121669d55def59f0be8aaffected
5d5314d6795f3c1c0f415348ff8c51f7de042b77< cfdc2fa4db57503bc6d3817240547c8ddc55fa96affected
5d5314d6795f3c1c0f415348ff8c51f7de042b77< f636a40834d22e5e3fc748f060211879c056cd33affected
5d5314d6795f3c1c0f415348ff8c51f7de042b77< 33d9c814652b971461d1e30bead6792851c209e7affected
5d5314d6795f3c1c0f415348ff8c51f7de042b77< 107e825cc448b7834b31e8b1b3cf0f57426d46d5affected
5d5314d6795f3c1c0f415348ff8c51f7de042b77< f694da720dcf795dc3eb97bf76d220213f76aaa7affected
5d5314d6795f3c1c0f415348ff8c51f7de042b77< e9730744bf3af04cda23799029342aa3cddbc454affected
… +10 more rows
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I. Basic Information for CVE-2024-39480

Vulnerability Information
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Vulnerability Title
kdb: Fix buffer overflow during tab-complete
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: kdb: Fix buffer overflow during tab-complete Currently, when the user attempts symbol completion with the Tab key, kdb will use strncpy() to insert the completed symbol into the command buffer. Unfortunately it passes the size of the source buffer rather than the destination to strncpy() with predictably horrible results. Most obviously if the command buffer is already full but cp, the cursor position, is in the middle of the buffer, then we will write past the end of the supplied buffer. Fix this by replacing the dubious strncpy() calls with memmove()/memcpy() calls plus explicit boundary checks to make sure we have enough space before we start moving characters around.
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tab补全期间缓冲区溢出。
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 5d5314d6795f3c1c0f415348ff8c51f7de042b77 ~ fb824a99e148ff272a53d71d84122728b5f00992 -
LinuxLinux 2.6.35 -

II. Public POCs for CVE-2024-39480

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III. Intelligence Information for CVE-2024-39480

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Same Patch Batch · Linux · 2024-07-05 · 14 CVEs total

CVE-2024-39485media: v4l: async: Properly re-initialise notifier entry in unregister
CVE-2024-39484mmc: davinci: Don't strip remove function when driver is builtin
CVE-2024-39482bcache: fix variable length array abuse in btree_iter
CVE-2024-39483KVM: SVM: WARN on vNMI + NMI window iff NMIs are outright masked
CVE-2024-39481media: mc: Fix graph walk in media_pipeline_start
CVE-2024-39479drm/i915/hwmon: Get rid of devm
CVE-2024-39478crypto: starfive - Do not free stack buffer
CVE-2024-39476md/raid5: fix deadlock that raid5d() wait for itself to clear MD_SB_CHANGE_PENDING
CVE-2024-39477mm/hugetlb: do not call vma_add_reservation upon ENOMEM
CVE-2024-39475fbdev: savage: Handle err return when savagefb_check_var failed
CVE-2024-39474mm/vmalloc: fix vmalloc which may return null if called with __GFP_NOFAIL
CVE-2024-39473ASoC: SOF: ipc4-topology: Fix input format query of process modules without base extension
CVE-2024-39472xfs: fix log recovery buffer allocation for the legacy h_size fixup

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-39480

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