CVE-2021-47254
- Source
- https://cve.org/CVERecord?id=CVE-2021-47254
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47254.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-47254
- Downstream
- Related
- Published
- 2024-05-21T15:15:14Z
- Modified
- 2026-03-15T22:00:14Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
gfs2: Fix use-after-free in gfs2_glock_shrink_scan
The GLF_LRU flag is checked under lru_lock in gfs2_glock_remove_from_lru() to remove the glock from the lru list in __gfs2_glock_put().
On the shrink scan path, the same flag is cleared under lru_lock but because of cond_resched_lock(&lru_lock) in gfs2_dispose_glock_lru(), progress on the put side can be made without deleting the glock from the lru list.
Keep GLF_LRU across the race window opened by cond_resched_lock(&lru_lock) to ensure correct behavior on both sides - clear GLF_LRU after list_del under lru_lock.
- References
-
- https://git.kernel.org/stable/c/094bf5670e762afa243d2c41a5c4ab71c7447bf4
- https://git.kernel.org/stable/c/1ab19c5de4c537ec0d9b21020395a5b5a6c059b2
- https://git.kernel.org/stable/c/38ce329534500bf4ae71f81df6a37a406cf187b4
- https://git.kernel.org/stable/c/86fd5b27db743a0ce0cc245e3a34813b2aa6ec1d
- https://git.kernel.org/stable/c/92869945cc5b78ee8a1ef90336fe070893e3458a
- https://git.kernel.org/stable/c/a61156314b66456ab6a291ed5deba1ebd002ab3c
- https://git.kernel.org/stable/c/e87ef30fe73e7e10d2c85bdcc778dcec24dca553
- https://git.kernel.org/stable/c/0364742decb0f02bc183404868b82896f7992595
Affected packages
Git /
Database specific
source
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47254.json"
unresolved_ranges
[
{
"events": [
{
"introduced": "4.4.181"
},
{
"fixed": "4.4.274"
}
]
},
{
"events": [
{
"introduced": "4.9.180"
},
{
"fixed": "4.9.274"
}
]
},
{
"events": [
{
"introduced": "4.14.123"
},
{
"fixed": "4.14.238"
}
]
},
{
"events": [
{
"introduced": "4.19.47"
},
{
"fixed": "4.19.196"
}
]
},
{
"events": [
{
"introduced": "5.0.20"
},
{
"fixed": "5.1"
}
]
},
{
"events": [
{
"introduced": "5.1.6"
},
{
"fixed": "5.4.127"
}
]
},
{
"events": [
{
"introduced": "5.5"
},
{
"fixed": "5.10.45"
}
]
},
{
"events": [
{
"introduced": "5.11"
},
{
"fixed": "5.12.12"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.13-rc1"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.13-rc2"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.13-rc3"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.13-rc4"
}
]
}
]