CVE-2022-3202 — A NULL pointer dereference flaw in diFree in fs/jfs/inode

A NULL pointer dereference flaw in diFree in fs/jfs/inode.c in Journaled File System (JFS)in the Linux kernel. This could allow a local attacker to crash the system or leak kernel internal information.

01What is this vulnerability?

A NULL pointer dereference flaw in diFree in fs/jfs/inode.c in Journaled File System (JFS)in the Linux kernel. This could allow a local attacker to crash the system or leak kernel internal information.

02Affected products

Vendor	Product	Versions
n	a / Kernel	Linux Kernel version prior to kernel 5.18 rc1

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2022-09-14T00:00:00.000Z
• Last modified: 2024-08-03T01:00:10.590Z

09References

• github.com — https://github.com/torvalds/linux/commit/a53046291020ec41e09181396c1e829287b48d4…
• security.netapp.com — https://security.netapp.com/advisory/ntap-20221228-0007/