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CVE-2021-47631— ARM: davinci: da850-evm: Avoid NULL pointer dereference

AI Predicted 3.3 Difficulty: Trivial EPSS 0.01% · P3

Affected Version Matrix 18

VendorProductVersion RangeStatus
LinuxLinuxbae105879f2f2404155da6f50b3636193d228a62< c06f476e5b74bcabb8c4a2fba55864a37e62843baffected
bae105879f2f2404155da6f50b3636193d228a62< a12b356d45cbb6e8a1b718d1436b3d6239a862f3affected
bae105879f2f2404155da6f50b3636193d228a62< c64e2ed5cc376e137e572babfd2edc38b2cfb61baffected
bae105879f2f2404155da6f50b3636193d228a62< 89931d4762572aaee6edbe5673d41f8082de110faffected
bae105879f2f2404155da6f50b3636193d228a62< 0a312ec66a03133d28570f07bc52749ccfef54daaffected
bae105879f2f2404155da6f50b3636193d228a62< 0940795c6834fbe7705acc5c3d4b2f7a5f67527aaffected
bae105879f2f2404155da6f50b3636193d228a62< c5628533a3ece64235d04fe11ec44d2be99e423daffected
bae105879f2f2404155da6f50b3636193d228a62< 83a1cde5c74bfb44b49cb2a940d044bb2380f4eaaffected
… +10 more rows
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I. Basic Information for CVE-2021-47631

Vulnerability Information
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Vulnerability Title
ARM: davinci: da850-evm: Avoid NULL pointer dereference
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ARM: davinci: da850-evm: Avoid NULL pointer dereference With newer versions of GCC, there is a panic in da850_evm_config_emac() when booting multi_v5_defconfig in QEMU under the palmetto-bmc machine: Unable to handle kernel NULL pointer dereference at virtual address 00000020 pgd = (ptrval) [00000020] *pgd=00000000 Internal error: Oops: 5 [#1] PREEMPT ARM Modules linked in: CPU: 0 PID: 1 Comm: swapper Not tainted 5.15.0 #1 Hardware name: Generic DT based system PC is at da850_evm_config_emac+0x1c/0x120 LR is at do_one_initcall+0x50/0x1e0 The emac_pdata pointer in soc_info is NULL because davinci_soc_info only gets populated on davinci machines but da850_evm_config_emac() is called on all machines via device_initcall(). Move the rmii_en assignment below the machine check so that it is only dereferenced when running on a supported SoC.
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux bae105879f2f2404155da6f50b3636193d228a62 ~ c06f476e5b74bcabb8c4a2fba55864a37e62843b -
LinuxLinux 2.6.33 -

II. Public POCs for CVE-2021-47631

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III. Intelligence Information for CVE-2021-47631

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Patches & Fixes for CVE-2021-47631 (8)

Same Patch Batch · Linux · 2025-02-26 · 706 CVEs total

CVE-2022-49498ALSA: pcm: Check for null pointer of pointer substream before dereferencing it
CVE-2022-49486ASoC: fsl: Fix refcount leak in imx_sgtl5000_probe
CVE-2022-49488drm/msm/mdp5: Return error code in mdp5_mixer_release when deadlock is detected
CVE-2022-49489drm/msm/disp/dpu1: set vbif hw config to NULL to avoid use after memory free during pm run
CVE-2022-49490drm/msm/mdp5: Return error code in mdp5_pipe_release when deadlock is detected
CVE-2022-49491drm/rockchip: vop: fix possible null-ptr-deref in vop_bind()
CVE-2022-49492nvme-pci: fix a NULL pointer dereference in nvme_alloc_admin_tags
CVE-2022-49493ASoC: rt5645: Fix errorenous cleanup order
CVE-2022-49494mtd: rawnand: cadence: fix possible null-ptr-deref in cadence_nand_dt_probe()
CVE-2022-49495drm/msm/hdmi: check return value after calling platform_get_resource_byname()
CVE-2022-49497net: remove two BUG() from skb_checksum_help()
CVE-2022-49496media: mediatek: vcodec: prevent kernel crash when rmmod mtk-vcodec-dec.ko
CVE-2022-49502media: rga: fix possible memory leak in rga_probe
CVE-2022-49507regulator: da9121: Fix uninit-value in da9121_assign_chip_model()
CVE-2022-49508HID: elan: Fix potential double free in elan_input_configured
CVE-2022-49506drm/mediatek: Add vblank register/unregister callback functions
CVE-2022-49504scsi: lpfc: Inhibit aborts if external loopback plug is inserted
CVE-2022-49505NFC: NULL out the dev->rfkill to prevent UAF
CVE-2022-49501usbnet: Run unregister_netdev() before unbind() again
CVE-2022-49500wl1251: dynamically allocate memory used for DMA

Showing top 20 of 706 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2021-47631

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