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CVE-2026-43171— EFI/CPER: don't dump the entire memory region

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，该漏洞源于在cper_print_fw_err中未检查错误记录长度，可能导致内存泄露或数据泄露。

AI Predicted 7.8 Difficulty: Moderate EPSS 0.16% · P5

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9< 02de64ab54b4bb0f1b21bb324aeff3b08612be33 affected
3d8c11efd528d56972d44ed0de51c4e11a9a4fa9< 0e09b522f2622841389c3b2f9ac4969e35c0809d affected
3d8c11efd528d56972d44ed0de51c4e11a9a4fa9< 64ae5aaa7ac93c83da456039e8ec747bfa8a7cff affected
3d8c11efd528d56972d44ed0de51c4e11a9a4fa9< 5a9b1dda8481b82851a655c3bcc5b44879b95334 affected
3d8c11efd528d56972d44ed0de51c4e11a9a4fa9< 7780c0bad2a3a70a8c0113a33c02f4151d901eb3 affected
3d8c11efd528d56972d44ed0de51c4e11a9a4fa9< a8419f5f2c5f2d80848ddabb2b95cf0da84a5f91 affected
3d8c11efd528d56972d44ed0de51c4e11a9a4fa9< 54e131db4cdffd946db890ff33ff2647053fd4f6 affected
3d8c11efd528d56972d44ed0de51c4e11a9a4fa9< 55cc6fe5716f678f06bcb95140882dfa684464ec affected
… +10 more rows
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I. Basic Information for CVE-2026-43171

Vulnerability Information
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Vulnerability Title
EFI/CPER: don't dump the entire memory region
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: EFI/CPER: don't dump the entire memory region The current logic at cper_print_fw_err() doesn't check if the error record length is big enough to handle offset. On a bad firmware, if the ofset is above the actual record, length -= offset will underflow, making it dump the entire memory. The end result can be: - the logic taking a lot of time dumping large regions of memory; - data disclosure due to the memory dumps; - an OOPS, if it tries to dump an unmapped memory region. Fix it by checking if the section length is too small before doing a hex dump. [ rjw: Subject tweaks ]
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，该漏洞源于在cper_print_fw_err中未检查错误记录长度，可能导致内存泄露或数据泄露。
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 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 ~ 02de64ab54b4bb0f1b21bb324aeff3b08612be33 -
Linux Linux 5.7 -

II. Public POCs for CVE-2026-43171

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III. Intelligence Information for CVE-2026-43171

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Patches & Fixes for CVE-2026-43171 (8)

Same Patch Batch · Linux · 2026-05-06 · 224 CVEs total

CVE-2026-43208 9.8 CRITICAL net: do not pass flow_id to set_rps_cpu()
CVE-2026-43125 9.8 CRITICAL dlm: validate length in dlm_search_rsb_tree
CVE-2026-43198 9.8 CRITICAL tcp: fix potential race in tcp_v6_syn_recv_sock()
CVE-2026-43186 9.8 CRITICAL ipv6: ioam: fix heap buffer overflow in __ioam6_fill_trace_data()
CVE-2026-43185 9.8 CRITICAL ksmbd: fix signededness bug in smb_direct_prepare_negotiation()
CVE-2026-43114 9.4 CRITICAL netfilter: nft_set_pipapo_avx2: don't return non-matching entry on expiry
CVE-2026-43197 9.1 CRITICAL netconsole: avoid OOB reads, msg is not nul-terminated
CVE-2026-43117 9.1 CRITICAL btrfs: tracepoints: get correct superblock from dentry in event btrfs_sync_file()
CVE-2026-43083 9.1 CRITICAL net: ioam6: fix OOB and missing lock
CVE-2026-43239 8.8 HIGH smb: client: prevent races in ->query_interfaces()
CVE-2026-43113 8.8 HIGH wifi: wl1251: validate packet IDs before indexing tx_frames
CVE-2026-43158 8.8 HIGH xfs: fix freemap adjustments when adding xattrs to leaf blocks
CVE-2026-43232 8.8 HIGH net: wan: farsync: Fix use-after-free bugs caused by unfinished tasklets
CVE-2026-43172 8.8 HIGH wifi: iwlwifi: fix 22000 series SMEM parsing
CVE-2026-43283 8.8 HIGH net: ethernet: ec_bhf: Fix dma_free_coherent() dma handle
CVE-2026-43176 8.8 HIGH wifi: rtw89: pci: validate release report content before using for RTL8922DE
CVE-2026-43112 8.8 HIGH fs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath
CVE-2026-43215 8.8 HIGH cifs: Fix locking usage for tcon fields
CVE-2026-43249 8.8 HIGH 9p/xen: protect xen_9pfs_front_free against concurrent calls
CVE-2026-43110 8.8 HIGH wifi: brcmfmac: validate bsscfg indices in IF events

Showing top 20 of 224 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-43171

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