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CVE-2023-52462— bpf: fix check for attempt to corrupt spilled pointer

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 bpf 模块的指针存在问题。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.23% · P12

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux cdd73a5ed0840da88a3b9ad353f568e6f156d417< 2757f17972d87773b3677777f5682510f13c66ef affected
07c286c10a9cedbd71f20269ff3a4e73d9aab2fe< 67e6707f07354ed1acb4e65552e97c60cf9d69cf affected
27113c59b6d0a587b29ae72d4ff3f832f58b0651< fc3e3c50a0a4cac1463967c110686189e4a59104 affected
27113c59b6d0a587b29ae72d4ff3f832f58b0651< 8dc15b0670594543c356567a1a45b0182ec63174 affected
27113c59b6d0a587b29ae72d4ff3f832f58b0651< 40617d45ea05535105e202a8a819e388a2b1f036 affected
27113c59b6d0a587b29ae72d4ff3f832f58b0651< ab125ed3ec1c10ccc36bc98c7a4256ad114a3dae affected
5.10.163< 5.10.209 affected
5.15.86< 5.15.148 affected
… +8 more rows
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I. Basic Information for CVE-2023-52462

Vulnerability Information
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Vulnerability Title
bpf: fix check for attempt to corrupt spilled pointer
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: bpf: fix check for attempt to corrupt spilled pointer When register is spilled onto a stack as a 1/2/4-byte register, we set slot_type[BPF_REG_SIZE - 1] (plus potentially few more below it, depending on actual spill size). So to check if some stack slot has spilled register we need to consult slot_type[7], not slot_type[0]. To avoid the need to remember and double-check this in the future, just use is_spilled_reg() helper.
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 bpf 模块的指针存在问题。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux cdd73a5ed0840da88a3b9ad353f568e6f156d417 ~ 2757f17972d87773b3677777f5682510f13c66ef -
Linux Linux 5.16 -

II. Public POCs for CVE-2023-52462

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III. Intelligence Information for CVE-2023-52462

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Mailing List Discussions for CVE-2023-52462 (1)

Other References for CVE-2023-52462 (6)

Same Patch Batch · Linux · 2024-02-23 · 19 CVEs total

CVE-2024-26594 9.1 CRITICAL ksmbd: validate mech token in session setup
CVE-2024-26598 8.8 HIGH KVM: arm64: vgic-its: Avoid potential UAF in LPI translation cache
CVE-2024-26597 7.8 HIGH net: qualcomm: rmnet: fix global oob in rmnet_policy
CVE-2023-52461 7.8 HIGH drm/sched: Fix bounds limiting when given a malformed entity
CVE-2023-52454 7.5 HIGH nvmet-tcp: Fix a kernel panic when host sends an invalid H2C PDU length
CVE-2023-52453 7.1 HIGH hisi_acc_vfio_pci: Update migration data pointer correctly on saving/resume
CVE-2023-52459 media: v4l: async: Fix duplicated list deletion
CVE-2024-26593 i2c: i801: Fix block process call transactions
CVE-2023-52455 iommu: Don't reserve 0-length IOVA region
CVE-2023-52456 serial: imx: fix tx statemachine deadlock
CVE-2023-52458 block: add check that partition length needs to be aligned with block size
CVE-2023-52457 serial: 8250: omap: Don't skip resource freeing if pm_runtime_resume_and_get() failed
CVE-2023-52460 drm/amd/display: Fix NULL pointer dereference at hibernate
CVE-2023-52464 EDAC/thunderx: Fix possible out-of-bounds string access
CVE-2023-52463 efivarfs: force RO when remounting if SetVariable is not supported
CVE-2024-26596 net: dsa: fix netdev_priv() dereference before check on non-DSA netdevice events
CVE-2024-26595 mlxsw: spectrum_acl_tcam: Fix NULL pointer dereference in error path
CVE-2024-26599 pwm: Fix out-of-bounds access in of_pwm_single_xlate()

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2023-52462

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