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Review reviewHigh

CVE-2022-49770

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: ceph: avoid putting the realm twice when decoding snaps fails When decoding the snaps fails it maybe leaving the 'first_realm' and 'realm' pointing to the same snaprealm memory. And then it'll put it twice and could cause random use-after-free, BUG_ON, etc issues.

CVSS
7.8
EPSS
-
- percentile
CISA KEV
Not listed
Published
2025.05.02
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: ceph: avoid putting the realm twice when decoding snaps fails When decoding the snaps fails it maybe leaving the 'first_realm' and 'realm' pointing to the same snaprealm memory. And then it'll put it twice and could cause random use-after-free, BUG_ON, etc issues.

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 9030aaf9bf0a1eee47a154c316c789e959638b0f < 274e4c79a3a2a24fba7cfe0e41113f1138785c37, >= 9030aaf9bf0a1eee47a154c316c789e959638b0f < cb7495fe957526555782ce0723f79ce92a6db22e, >= 9030aaf9bf0a1eee47a154c316c789e959638b0f < 044bc6d3c2c0e9090b0841e7b723875756534b45, >= 9030aaf9bf0a1eee47a154c316c789e959638b0f < 2f6e2de3a5289004650118b61f138fe7c28e1905, >= 9030aaf9bf0a1eee47a154c316c789e959638b0f < fd879c83e87735ab8f00ef7755752cf0cbae24b2, >= 9030aaf9bf0a1eee47a154c316c789e959638b0f < 51884d153f7ec85e18d607b2467820a90e0f4359, >= 2.6.34, >= 2.6.35 < 4.19.268, >= 4.20 < 5.4.226, >= 5.5 < 5.10.157, >= 5.11 < 5.15.81, >= 5.16 < 6.0.10, 2.6.34, 6.1
Fixed versions
4.19.268, 5.4.226, 5.10.157, 5.15.81, 6.0.10

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-416