What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-05-01 · updated 2026-08-15
• Weakness: CWE-416

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.

Affected products

• Linux kernel: from 2.6.35 before 4.19.268; from 4.20 before 5.4.226; from 5.5 before 5.10.157; from 5.11 before 5.15.81; from 5.16 before 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 (+6) — fixed in 4.19.268, 5.10.157, 5.15.81, 5.4.226, 6.0.10

How to fix

Upgrade to a fixed version: Linux kernel 4.19.268, 5.10.157, 5.15.81, 5.4.226. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/044bc6d3c2c0e9090b0841e7b723875756534b45
• https://git.kernel.org/stable/c/274e4c79a3a2a24fba7cfe0e41113f1138785c37
• https://git.kernel.org/stable/c/2f6e2de3a5289004650118b61f138fe7c28e1905
• https://git.kernel.org/stable/c/51884d153f7ec85e18d607b2467820a90e0f4359
• https://git.kernel.org/stable/c/cb7495fe957526555782ce0723f79ce92a6db22e
• https://git.kernel.org/stable/c/fd879c83e87735ab8f00ef7755752cf0cbae24b2

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