7.8

CVE-2022-50567: fs: jfs: fix shift-out-of-bounds in dbAllocAG

Deferred
AliasesUBUNTU-CVE-2022-50567DEBIAN-CVE-2022-50567
Published 22-10-2025Last modified 05-08-2026

Vulnerability summary

CVE-2022-50567 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 6.5% 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 4 · Related 4
SUSE-SU-2025:4111-1SUSE-SU-2025:4139-1SUSE-SU-2025:4149-1SUSE-SU-2025:4320-1

Timeline

  1. 22-10-2025
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: fs: jfs: fix shift-out-of-bounds in dbAllocAG Syzbot found a crash : UBSAN: shift-out-of-bounds in dbAllocAG. The underlying bug is the missing check of bmp->db_agl2size. The field can be greater than 64 and trigger the shift-out-of-bounds. Fix this bug by adding a check of bmp->db_agl2size in dbMount since this field is used in many following functions. The upper bound for this field is L2MAXL2SIZE - L2MAXAG, thanks for the help of Dave Kleikamp. Note that, for maintenance, I reorganized error handling code of dbMount.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.17%

Chance of exploitation in the next 30 days

Percentile

7%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.17% 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

No weakness data has been published for this record.

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)
Debian1 product
  • linux< 6.1.4-1
Linux1 product
  • linux≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < d3b486946a4e62c7ef6023f7d9c1d049051384ba | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 3115313cf03113e87c87adee18ee49a20bbdb9ba | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < eea87acb6027be3dd4d3c57186bb22800d57fdda | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 359616ce587e524107730504891afa4b1a8be58c | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 3e997e4ce8ae7ab89d72334120f6aee49c5bbdbd | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 0536f76a2bca83d1a3740517ba22cc93a44b3099 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 2c575c8905f7a8b32d5611b91856b69bac2a5bf1 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 67973caae78e21ee46a7281aaa8ca364eb9c444f | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 898f706695682b9954f280d95e49fa86ffa55d08 | 2.6.12

3 vendors · 122 products

References

13 links
Show all 13 references