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CVE-2023-52893— gsmi: fix null-deref in gsmi_get_variable

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 gsmi 组件在获取EFI变量时存在空指针解引用问题。

AI Predicted 5.5 Difficulty: Easy EPSS 0.24% · P14

Possible ATT&CK Techniques 1 AI

T1044

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux 74c5b31c6618f01079212332b2e5f6c42f2d6307< ee5763ef829bd923033510de6d1df7c73f085e4b affected
74c5b31c6618f01079212332b2e5f6c42f2d6307< 32313c11bdc8a02c577abaf865be3664ab30410a affected
74c5b31c6618f01079212332b2e5f6c42f2d6307< ffef77794fb5f1245c3249b86342bad2299accb5 affected
74c5b31c6618f01079212332b2e5f6c42f2d6307< ae2a9dcc8caa60b1e14671294e5ec902ea5d1dfd affected
74c5b31c6618f01079212332b2e5f6c42f2d6307< eb0421d90f916dffe96b4c049ddf01c0c50620d2 affected
74c5b31c6618f01079212332b2e5f6c42f2d6307< 6646d769fdb0ce4318ef9afd127f8526d1ca8393 affected
74c5b31c6618f01079212332b2e5f6c42f2d6307< a769b05eeed7accc4019a1ed9799dd72067f1ce8 affected
3.0 affected
… +8 more rows
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I. Basic Information for CVE-2023-52893

Vulnerability Information
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Vulnerability Title
gsmi: fix null-deref in gsmi_get_variable
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: gsmi: fix null-deref in gsmi_get_variable We can get EFI variables without fetching the attribute, so we must allow for that in gsmi. commit 859748255b43 ("efi: pstore: Omit efivars caching EFI varstore access layer") added a new get_variable call with attr=NULL, which triggers panic in gsmi.
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 gsmi 组件在获取EFI变量时存在空指针解引用问题。
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 74c5b31c6618f01079212332b2e5f6c42f2d6307 ~ ee5763ef829bd923033510de6d1df7c73f085e4b -
Linux Linux 3.0 -

II. Public POCs for CVE-2023-52893

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III. Intelligence Information for CVE-2023-52893

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Other References for CVE-2023-52893 (7)

Same Patch Batch · Linux · 2024-08-21 · 68 CVEs total

CVE-2023-52910 8.8 HIGH iommu/iova: Fix alloc iova overflows issue
CVE-2024-43881 8.8 HIGH wifi: ath12k: change DMA direction while mapping reinjected packets
CVE-2022-48871 8.8 HIGH tty: serial: qcom-geni-serial: fix slab-out-of-bounds on RX FIFO buffer
CVE-2024-43878 8.1 HIGH xfrm: Fix input error path memory access
CVE-2022-48883 7.8 HIGH net/mlx5e: IPoIB, Block PKEY interfaces with less rx queues than parent
CVE-2024-43882 7.8 HIGH exec: Fix ToCToU between perm check and set-uid/gid usage
CVE-2023-52913 7.8 HIGH drm/i915: Fix potential context UAFs
CVE-2022-48892 7.8 HIGH sched/core: Fix use-after-free bug in dup_user_cpus_ptr()
CVE-2024-43877 7.8 HIGH media: pci: ivtv: Add check for DMA map result
CVE-2024-43880 7.8 HIGH mlxsw: spectrum_acl_erp: Fix object nesting warning
CVE-2022-48899 7.8 HIGH drm/virtio: Fix GEM handle creation UAF
CVE-2022-48872 7.8 HIGH misc: fastrpc: Fix use-after-free race condition for maps
CVE-2022-48873 7.8 HIGH misc: fastrpc: Don't remove map on creater_process and device_release
CVE-2022-48874 7.8 HIGH misc: fastrpc: Fix use-after-free and race in fastrpc_map_find
CVE-2023-52903 7.8 HIGH io_uring: lock overflowing for IOPOLL
CVE-2022-48887 7.8 HIGH drm/vmwgfx: Remove rcu locks from user resources
CVE-2022-48878 7.8 HIGH Bluetooth: hci_qca: Fix driver shutdown on closed serdev
CVE-2023-52907 7.8 HIGH nfc: pn533: Wait for out_urb's completion in pn533_usb_send_frame()
CVE-2023-52909 7.5 HIGH nfsd: fix handling of cached open files in nfsd4_open codepath
CVE-2024-43872 7.5 HIGH RDMA/hns: Fix soft lockup under heavy CEQE load

Showing top 20 of 68 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2023-52893

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