9.8

CVE-2022-49770: ceph: avoid putting the realm twice when decoding snaps fails

Modified
AliasesUBUNTU-CVE-2022-49770DEBIAN-CVE-2022-49770
Published 01-05-2025Last modified 15-08-2026

Vulnerability summary

CVE-2022-49770 is a critical (CVSS 9.8) Use After Free vulnerability in linux. EPSS estimates a 0.58% chance of exploitation in the next 30 days, higher than 47.8% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 9.8 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.58%
0%100%
Low · +0.01 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 10 · Related 10
SUSE-SU-2025:01918-1SUSE-SU-2025:01966-1SUSE-SU-2025:01982-1SUSE-SU-2025:01995-1SUSE-SU-2025:02173-1SUSE-SU-2025:02262-1

Timeline

  1. 01-05-2025
    PublishedVulnerability first disclosed.
  2. 15-08-2026
    Last modifiedVulnerability information updated.

Description

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 metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.58%

Chance of exploitation in the next 30 days

Percentile

48%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 0.57% 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

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu113 products
  • linuxAll versions (No fix recorded) | < 5.4.0-144.161 | < 5.15.0-67.74
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.4.0-1097.105 | < 5.15.0-1031.35
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 982d6011bc30a26e8a3d546e0e7fc7db2c255d85, < 274e4c79a3a2a24fba7cfe0e41113f1138785c37 | ≥ 982d6011bc30a26e8a3d546e0e7fc7db2c255d85, < cb7495fe957526555782ce0723f79ce92a6db22e | ≥ 982d6011bc30a26e8a3d546e0e7fc7db2c255d85, < 044bc6d3c2c0e9090b0841e7b723875756534b45 | ≥ 982d6011bc30a26e8a3d546e0e7fc7db2c255d85, < 2f6e2de3a5289004650118b61f138fe7c28e1905 | ≥ 982d6011bc30a26e8a3d546e0e7fc7db2c255d85, < fd879c83e87735ab8f00ef7755752cf0cbae24b2 | ≥ 982d6011bc30a26e8a3d546e0e7fc7db2c255d85, < 51884d153f7ec85e18d607b2467820a90e0f4359 | 4.0
  • linux_kernel≥ 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 | 2.6.34:rc2 | 2.6.34:rc3 | 2.6.34:rc4 | 2.6.34:rc5 | 2.6.34:rc6 | 2.6.34:rc7 | 6.1:rc1 | 6.1:rc2 | 6.1:rc3 | 6.1:rc4 | 6.1:rc5
Debian1 product
  • linux< 6.0.10-1

3 vendors · 116 products

References

10 links