5.5

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

Analyzed
AliasesUBUNTU-CVE-2026-43124DEBIAN-CVE-2026-43124
Published 06-05-2026Last modified 23-05-2026

Vulnerability summary

CVE-2026-43124 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2.4% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.13%
0%100%
Low · -0.03 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 37 · Related 37
OPENSUSE-SU-2026:21388-1SUSE-SU-2026:22742-1SUSE-SU-2026:22769-1SUSE-SU-2026:22809-1SUSE-SU-2026:22810-1SUSE-SU-2026:22812-1

Timeline

  1. 06-05-2026
    PublishedVulnerability first disclosed.
  2. 23-05-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.13%

Chance of exploitation in the next 30 days

Percentile

2%

Versus all other CVEs

30-day change

Decrease -0.03 pp

From 0.16% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu157 products
  • linuxAll versions (No fix recorded) | < 5.15.0-186.196 | < 6.8.0-134.134
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1112.119 | < 6.8.0-1060.63
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 831b624df1b420c8f9281ed1307a8db23afb72df, < d47234840aeb4182ed3ee795c578b1dfa9cbd25b | ≥ 831b624df1b420c8f9281ed1307a8db23afb72df, < 49918dd52615097529811d21ec6074dd02ebe77c | ≥ 831b624df1b420c8f9281ed1307a8db23afb72df, < 8baa234181f632cabacf73e4834a910859e9fcc9 | ≥ 831b624df1b420c8f9281ed1307a8db23afb72df, < 1da904e84de608907662ad8a51ba9c571d61e003 | ≥ 831b624df1b420c8f9281ed1307a8db23afb72df, < 8d849adfbc3e98417fb541620568db1a759ef441 | ≥ 831b624df1b420c8f9281ed1307a8db23afb72df, < 2c99326dc1c79b7ce3c8dd92929b5ce724ff70eb | ≥ 831b624df1b420c8f9281ed1307a8db23afb72df, < 88d5b28f63c7aac1271784e3b800ed405d1cde75 | ≥ 831b624df1b420c8f9281ed1307a8db23afb72df, < 05363abc7625cf18c96e67f50673cd07f11da5e9 | 9095f19baae92afb978f8df77d19280fe291b337 | 36a9916189b46b78dbf4fa542739b464444f0537 | 1cd01dba1355e291f636555b1920625ed58c1623 | 7026e2457c5b0c0e8a81e65a8209b8420a437b4d | 1e5b387747ba285a64348b9a96b246d0b9d52b03 | d0028f48b33086cf6d8f87831a650866107b5785 | ≥ 3.16.62, < 3.17 | ≥ 3.18.123, < 3.19 | ≥ 4.4.158, < 4.5 | ≥ 4.9.129, < 4.10 | ≥ 4.14.72, < 4.15 | ≥ 4.18.10, < 4.19 | 4.19
  • linux_kernel≥ 3.16.62, < 5.10.252 | ≥ 5.11, < 5.15.202 | ≥ 5.16, < 6.1.165 | ≥ 6.2, < 6.6.128 | ≥ 6.7, < 6.12.75 | ≥ 6.13, < 6.18.16 | ≥ 6.19, < 6.19.6
Debian1 product
  • linux< 6.1.170-1 | < 6.12.85-1 | < 6.19.6-1

3 vendors · 160 products

References

37 links
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