Vulnerability details
CVE-2025-21671
Linux Linux
zram: fix potential UAF of zram table
CVSS 3.1
7.8High
Official description
In the Linux kernel, the following vulnerability has been resolved: zram: fix potential UAF of zram table If zram_meta_alloc failed early, it frees allocated zram->table without setting it NULL. Which will potentially cause zram_meta_free to access the table if user reset an failed and uninitialized device.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.8High | 3.1 | CISA ADP / Vulnrichment (CISA-ADP) | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Linux | Linux | 0b5b0b65561b34e6e360de317e4bcd031bfabf42 ≤ v < 571d3f6045cd3a6d9f6aec33b678f3ffe97582ef | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 6.1.122 ≤ v < 6.1.127 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 6.12.7 ≤ v < 6.12.11 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 6.6.68 ≤ v < 6.6.74 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 6fb92e9a52e3feae309a213950f21dfcd1eb0b40 ≤ v < 902ef8f16d5ca77edc77c30656be54186c1e99b7 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 74363ec674cb172d8856de25776c8f3103f05e2f ≤ v < 212fe1c0df4a150fb6298db2cfff267ceaba5402 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | ac3b5366b9b7c9d97b606532ceab43d2329a22f3 ≤ v < fe3de867f94819ba0f28e035c0b0182150147d95 | CVEProject cvelistV5 (CNA) |
References and advisories
5- https://git.kernel.org/stable/c/fe3de867f94819ba0f28e035c0b0182150147d95
- https://git.kernel.org/stable/c/571d3f6045cd3a6d9f6aec33b678f3ffe97582ef
- https://git.kernel.org/stable/c/902ef8f16d5ca77edc77c30656be54186c1e99b7
- https://git.kernel.org/stable/c/212fe1c0df4a150fb6298db2cfff267ceaba5402
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
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Details
- Published
- 2025-01-31
- Last updated
- 2026-05-12
- State
- Published
- Assigner (CNA)
- Linux
Exploit prediction (EPSS)
0.21%
Probability of exploitation in 30 days
12%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-416Use After Free