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CVE-2022-50567

HIGHCVSS 7.8/10EPSS 0.23%

Last modified

CVE-2022-50567 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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. EPSS estimates a 0.23% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
0.23%

14.2th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < d3b486946a4e62c7ef6023f7d9c1d049051384ba; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 3115313cf03113e87c87adee18ee49a20bbdb9ba; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < eea87acb6027be3dd4d3c57186bb22800d57fdda; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 359616ce587e524107730504891afa4b1a8be58c; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 3e997e4ce8ae7ab89d72334120f6aee49c5bbdbd; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 0536f76a2bca83d1a3740517ba22cc93a44b3099; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 2c575c8905f7a8b32d5611b91856b69bac2a5bf1; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 67973caae78e21ee46a7281aaa8ca364eb9c444f; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 898f706695682b9954f280d95e49fa86ffa55d08
LinuxLinux2.6.12

References

Timeline

Published
Last Modified
Status
Deferred

Frequently Asked Questions

What is CVE-2022-50567?
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.
How severe is CVE-2022-50567?
CVE-2022-50567 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.23% probability of exploitation in the next 30 days.
How do I fix CVE-2022-50567?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST