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CVE-2021-47187— arm64: dts: qcom: msm8998: Fix CPU/L2 idle state latency and residency

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CPU/L2的空闲状态延迟和最小驻留状态存在安全漏洞。

AI Predicted 5.5 Difficulty: Theoretical EPSS 0.22% · P12

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux c3083c80b52c4e29b65ed838d2e66a91b13a3152< a14d7038ea201c5526375becfc43b9ba281b1e82 affected
c3083c80b52c4e29b65ed838d2e66a91b13a3152< e52fecdd0c142b95c720683885b06ee3f0e065c8 affected
c3083c80b52c4e29b65ed838d2e66a91b13a3152< 118c826ef8b43efe0fda8faf419673707ee8c5e5 affected
c3083c80b52c4e29b65ed838d2e66a91b13a3152< 3f1dcaff642e75c1d2ad03f783fa8a3b1f56dd50 affected
5.3 affected
< 5.3 unaffected
5.4.162≤ 5.4.* unaffected
5.10.82≤ 5.10.* unaffected
… +2 more rows
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I. Basic Information for CVE-2021-47187

Vulnerability Information
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Vulnerability Title
arm64: dts: qcom: msm8998: Fix CPU/L2 idle state latency and residency
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: arm64: dts: qcom: msm8998: Fix CPU/L2 idle state latency and residency The entry/exit latency and minimum residency in state for the idle states of MSM8998 were ..bad: first of all, for all of them the timings were written for CPU sleep but the min-residency-us param was miscalculated (supposedly, while porting this from downstream); Then, the power collapse states are setting PC on both the CPU cluster *and* the L2 cache, which have different timings: in the specific case of L2 the times are higher so these ones should be taken into account instead of the CPU ones. This parameter misconfiguration was not giving particular issues because on MSM8998 there was no CPU scaling at all, so cluster/L2 power collapse was rarely (if ever) hit. When CPU scaling is enabled, though, the wrong timings will produce SoC unstability shown to the user as random, apparently error-less, sudden reboots and/or lockups. This set of parameters are stabilizing the SoC when CPU scaling is ON and when power collapse is frequently hit.
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CPU/L2的空闲状态延迟和最小驻留状态存在安全漏洞。
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 c3083c80b52c4e29b65ed838d2e66a91b13a3152 ~ a14d7038ea201c5526375becfc43b9ba281b1e82 -
Linux Linux 5.3 -

II. Public POCs for CVE-2021-47187

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III. Intelligence Information for CVE-2021-47187

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Other References for CVE-2021-47187 (4)

Same Patch Batch · Linux · 2024-04-10 · 39 CVEs total

CVE-2021-47215 9.8 CRITICAL net/mlx5e: kTLS, Fix crash in RX resync flow
CVE-2021-47203 8.8 HIGH scsi: lpfc: Fix list_add() corruption in lpfc_drain_txq()
CVE-2021-47183 8.8 HIGH scsi: lpfc: Fix link down processing to address NULL pointer dereference
CVE-2021-47184 8.8 HIGH i40e: Fix NULL ptr dereference on VSI filter sync
CVE-2021-47189 7.8 HIGH btrfs: fix memory ordering between normal and ordered work functions
CVE-2021-47197 7.8 HIGH net/mlx5e: nullify cq->dbg pointer in mlx5_debug_cq_remove()
CVE-2021-47196 7.8 HIGH RDMA/core: Set send and receive CQ before forwarding to the driver
CVE-2021-47209 7.8 HIGH sched/fair: Prevent dead task groups from regaining cfs_rq's
CVE-2021-47194 7.8 HIGH cfg80211: call cfg80211_stop_ap when switch from P2P_GO type
CVE-2024-26815 7.8 HIGH net/sched: taprio: proper TCA_TAPRIO_TC_ENTRY_INDEX check
CVE-2021-47200 7.8 HIGH drm/prime: Fix use after free in mmap with drm_gem_ttm_mmap
CVE-2021-47201 7.8 HIGH iavf: free q_vectors before queues in iavf_disable_vf
CVE-2021-47188 7.8 HIGH scsi: ufs: core: Improve SCSI abort handling
CVE-2021-47191 7.1 HIGH scsi: scsi_debug: Fix out-of-bound read in resp_readcap16()
CVE-2021-47219 7.1 HIGH scsi: scsi_debug: Fix out-of-bound read in resp_report_tgtpgs()
CVE-2021-47206 usb: host: ohci-tmio: check return value after calling platform_get_resource()
CVE-2021-47207 ALSA: gus: fix null pointer dereference on pointer block
CVE-2021-47199 net/mlx5e: CT, Fix multiple allocations and memleak of mod acts
CVE-2021-47210 usb: typec: tipd: Remove WARN_ON in tps6598x_block_read
CVE-2021-47211 ALSA: usb-audio: fix null pointer dereference on pointer cs_desc

Showing top 20 of 39 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2021-47187

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