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CVE-2026-43124— pstore: ram_core: fix incorrect success return when vmap() fails

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pstore ram_core中vmap失败时错误返回成功，可能导致访问无效地址并引发崩溃。

AI Predicted 5.5 Difficulty: Easy EPSS 0.16% · P5

Affected Version Matrix 30

VendorProduct Version RangeStatus
Linux Linux 831b624df1b420c8f9281ed1307a8db23afb72df< d47234840aeb4182ed3ee795c578b1dfa9cbd25b affected
831b624df1b420c8f9281ed1307a8db23afb72df< 49918dd52615097529811d21ec6074dd02ebe77c affected
831b624df1b420c8f9281ed1307a8db23afb72df< 8baa234181f632cabacf73e4834a910859e9fcc9 affected
831b624df1b420c8f9281ed1307a8db23afb72df< 1da904e84de608907662ad8a51ba9c571d61e003 affected
831b624df1b420c8f9281ed1307a8db23afb72df< 8d849adfbc3e98417fb541620568db1a759ef441 affected
831b624df1b420c8f9281ed1307a8db23afb72df< 2c99326dc1c79b7ce3c8dd92929b5ce724ff70eb affected
831b624df1b420c8f9281ed1307a8db23afb72df< 88d5b28f63c7aac1271784e3b800ed405d1cde75 affected
831b624df1b420c8f9281ed1307a8db23afb72df< 05363abc7625cf18c96e67f50673cd07f11da5e9 affected
… +22 more rows
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I. Basic Information for CVE-2026-43124

Vulnerability Information
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Vulnerability Title
pstore: ram_core: fix incorrect success return when vmap() fails
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: pstore: ram_core: fix incorrect success return when vmap() fails In persistent_ram_vmap(), vmap() may return NULL on failure. If offset is non-zero, adding offset_in_page(start) causes the function to return a non-NULL pointer even though the mapping failed. persistent_ram_buffer_map() therefore incorrectly returns success. Subsequent access to prz->buffer may dereference an invalid address and cause crashes. Add proper NULL checking for vmap() failures.
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pstore ram_core中vmap失败时错误返回成功，可能导致访问无效地址并引发崩溃。
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 831b624df1b420c8f9281ed1307a8db23afb72df ~ d47234840aeb4182ed3ee795c578b1dfa9cbd25b -
Linux Linux 4.19 -

II. Public POCs for CVE-2026-43124

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III. Intelligence Information for CVE-2026-43124

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Patches & Fixes for CVE-2026-43124 (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-2026-43117 9.1 CRITICAL btrfs: tracepoints: get correct superblock from dentry in event btrfs_sync_file()
CVE-2026-43197 9.1 CRITICAL netconsole: avoid OOB reads, msg is not nul-terminated
CVE-2026-43083 9.1 CRITICAL net: ioam6: fix OOB and missing lock
CVE-2026-43158 8.8 HIGH xfs: fix freemap adjustments when adding xattrs to leaf blocks
CVE-2026-43112 8.8 HIGH fs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath
CVE-2026-43113 8.8 HIGH wifi: wl1251: validate packet IDs before indexing tx_frames
CVE-2026-43110 8.8 HIGH wifi: brcmfmac: validate bsscfg indices in IF events
CVE-2026-43249 8.8 HIGH 9p/xen: protect xen_9pfs_front_free against concurrent calls
CVE-2026-43239 8.8 HIGH smb: client: prevent races in ->query_interfaces()
CVE-2026-43232 8.8 HIGH net: wan: farsync: Fix use-after-free bugs caused by unfinished tasklets
CVE-2026-43283 8.8 HIGH net: ethernet: ec_bhf: Fix dma_free_coherent() dma handle
CVE-2026-43172 8.8 HIGH wifi: iwlwifi: fix 22000 series SMEM parsing
CVE-2026-43176 8.8 HIGH wifi: rtw89: pci: validate release report content before using for RTL8922DE
CVE-2026-43215 8.8 HIGH cifs: Fix locking usage for tcon fields

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-2026-43124

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