7.8

CVE-2022-50423: ACPICA: Fix use-after-free in acpi_ut_copy_ipackage_to_ipackage()

Modified
AliasesUBUNTU-CVE-2022-50423DEBIAN-CVE-2022-50423
Published 01-10-2025Last modified 05-08-2026

Vulnerability summary

CVE-2022-50423 is a high (CVSS 7.8) Use After Free vulnerability in linux. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 5.9% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.17%
0%100%
Low · 0.00 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 15 · Related 13
RHSA-2023:6583RHSA-2024:3138SUSE-SU-2025:03615-1SUSE-SU-2025:03628-1SUSE-SU-2025:3716-1SUSE-SU-2025:3761-1

Timeline

  1. 01-10-2025
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: ACPICA: Fix use-after-free in acpi_ut_copy_ipackage_to_ipackage() There is an use-after-free reported by KASAN: BUG: KASAN: use-after-free in acpi_ut_remove_reference+0x3b/0x82 Read of size 1 at addr ffff888112afc460 by task modprobe/2111 CPU: 0 PID: 2111 Comm: modprobe Not tainted 6.1.0-rc7-dirty Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), Call Trace: <TASK> kasan_report+0xae/0xe0 acpi_ut_remove_reference+0x3b/0x82 acpi_ut_copy_iobject_to_iobject+0x3be/0x3d5 acpi_ds_store_object_to_local+0x15d/0x3a0 acpi_ex_store+0x78d/0x7fd acpi_ex_opcode_1A_1T_1R+0xbe4/0xf9b acpi_ps_parse_aml+0x217/0x8d5 ... </TASK> The root cause of the problem is that the acpi_operand_object is freed when acpi_ut_walk_package_tree() fails in acpi_ut_copy_ipackage_to_ipackage(), lead to repeated release in acpi_ut_copy_iobject_to_iobject(). The problem was introduced by "8aa5e56eeb61" commit, this commit is to fix memory leak in acpi_ut_copy_iobject_to_iobject(), repeatedly adding remove operation, lead to "acpi_operand_object" used after free. Fix it by removing acpi_ut_remove_reference() in acpi_ut_copy_ipackage_to_ipackage(). acpi_ut_copy_ipackage_to_ipackage() is called to copy an internal package object into another internal package object, when it fails, the memory of acpi_operand_object should be freed by the caller.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.17%

Chance of exploitation in the next 30 days

Percentile

6%

Versus all other CVEs

30-day change

No change 0.00 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.

Ubuntu120 products
  • linuxAll versions (No fix recorded) | < 4.15.0-208.220 | < 5.4.0-144.161 | < 5.15.0-69.76
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 4.15.0-1153.166 | < 5.4.0-1097.105 | < 5.15.0-1033.37
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 8aa5e56eeb61a099ea6519eb30ee399e1bc043ce, < 133462d35dae95edb944af86b986d4c9dec59bd1 | ≥ 8aa5e56eeb61a099ea6519eb30ee399e1bc043ce, < 02f237423c9c6a18e062de2d474f85d5659e4eb9 | ≥ 8aa5e56eeb61a099ea6519eb30ee399e1bc043ce, < c9125b643fc51b8e662f2f614096ceb45a0adbc3 | ≥ 8aa5e56eeb61a099ea6519eb30ee399e1bc043ce, < dfdde4d5138bc023897033a5ac653a84e94805be | ≥ 8aa5e56eeb61a099ea6519eb30ee399e1bc043ce, < 02617006b5a46f2ea55ac61f5693c7afd7bf9276 | ≥ 8aa5e56eeb61a099ea6519eb30ee399e1bc043ce, < 6fde666278f91b85d71545a0ebbf41d8d7af8074 | ≥ 8aa5e56eeb61a099ea6519eb30ee399e1bc043ce, < f51b2235e4f320edc839c3e5cb0d1f8a6e8657c6 | ≥ 8aa5e56eeb61a099ea6519eb30ee399e1bc043ce, < 01f2c2052ea50fb9a8ce12e4e83aed0267934ef0 | ≥ 8aa5e56eeb61a099ea6519eb30ee399e1bc043ce, < 470188b09e92d83c5a997f25f0e8fb8cd2bc3469 | b3e98f0c4f996cd53b80bad71f0d7e4a2cf3a4e8 | 7af5504c102a378376101dbd160246b10a814dd0 | e29a15484d7ea949e49ae7fb7e576a575da824a6 | e2ab6731a36966d042a2d4dabd980496cd680f75 | ≥ 3.10.55, < 3.11 | ≥ 3.12.29, < 3.13 | ≥ 3.14.19, < 3.15 | ≥ 3.16.3, < 3.17 | 3.17
  • linux_kernel≥ 3.10.55, < 3.11 | ≥ 3.12.29, < 3.13 | ≥ 3.14.19, < 3.15 | ≥ 3.16.3, < 4.9.337 | ≥ 4.10, < 4.14.303 | ≥ 4.15, < 4.19.270 | ≥ 4.20, < 5.4.229 | ≥ 5.5, < 5.10.163 | ≥ 5.11, < 5.15.86 | ≥ 5.16, < 6.0.16 | ≥ 6.1, < 6.1.2
Debian1 product
  • linux< 6.1.4-1

3 vendors · 123 products

References

13 links
Show all 13 references