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Linux KernelOperating system · Linux

CVE-2022-49363

MEDIUM · 5.5 CVSS v3.1 Published 2025-02-26
Fix available
A fix is available. Upgrade to 5.4.198 / 5.10.121 or later.
See remediation →
57/100
Remediation priority · Elevated
Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to do sanity check on block address in f2fs_do_zero_range() As Yanming reported in bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=215894 I have encountered a bug in F2FS file system in kernel v5.17. I have uploaded the system call sequence as case.c, and a fuzzed image can be found in google net disk The kernel should enable CONFIG_KASAN=y and CONFIG_KASAN_INLINE=y. You can reproduce the bug by running the following commands: kernel BUG at fs/f2fs/segment.c:2291! Call Trace: f2fs_invalidate_blocks+0x193/0x2d0 f2fs_fallocate+0x2593/0x4a70 vfs_fallocate+0x2a5/0xac0 ksys_fallocate+0x35/0x70 __x64_sys_fallocate+0x8e/0xf0 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x44/0xae The root cause is, after image was fuzzed, block mapping info in inode will be inconsistent with SIT table, so in f2fs_fallocate(), it will cause panic when updating SIT with invalid blkaddr. Let's fix the issue by adding sanity check on block address before updating SIT table with it.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis

A detailed technical summary for this CVE is being prepared.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Linux KernelOperating system
Affected:>= 3.8, < 5.4.198>= 5.5, < 5.10.121>= 5.11, < 5.15.46>= 5.16, < 5.17.14>= 5.18, < 5.18.3

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 5.4.198 / 5.10.121 / 5.15.46 or later
Fixed in 5.4.1985.10.1215.15.46
Vendor patch git.kernel.org →
Recommended fix High confidence

Upgrade to Linux kernel 5.4.198+, 5.10.121+, 5.15.46+, or 5.17.14+ (depending on your version branch)

  1. 1. Identify the current running Linux kernel version using `uname -r` or `cat /proc/version`
  2. 2. Determine which version branch your kernel belongs to (e.g., 5.17.x, 5.15.x, 5.10.x, or 5.4.x)
  3. 3. For kernels in the 5.17.x branch: upgrade to kernel version 5.17.14 or later
  4. 4. For kernels in the 5.15.x branch: upgrade to kernel version 5.15.46 or later
  5. 5. For kernels in the 5.10.x branch: upgrade to kernel version 5.10.121 or later
  6. 6. For kernels in the 5.4.x branch: upgrade to kernel version 5.4.198 or later
  7. 7. Update the kernel using the distribution's package manager (e.g., `apt-get update && apt-get install linux-image-*` for Debian/Ubuntu, `yum update kernel` for RHEL/CentOS, or `dnf upgrade kernel` for Fedora)
  8. 8. Reboot the system to load the fixed kernel
Caveat Kernel upgrades may require system reboot and could introduce compatibility changes with custom modules or older drivers; ensure custom F2FS modules are rebuilt for the new kernel

Generated from the published advisory — verify against the referenced sources before acting.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2022-49363 in production — separate from our analysis above.

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