CVE-2025-21671
zram: fix potential UAF of zram table
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
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.
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.
Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks.
CVSS Scores
SSVC
- Decision:Track*
Timeline
- 2024-12-29 CVE Reserved
- 2025-01-31 CVE Published
- 2025-11-03 CVE Updated
- 2026-04-24 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-416: Use After Free
CAPEC
References (9)
| URL | Tag | Source |
|---|---|---|
| https://git.kernel.org/stable/c/ac3b5366b9b7c9d97b606532ceab43d2329a22f3 | Vuln. Introduced | |
| https://git.kernel.org/stable/c/0b5b0b65561b34e6e360de317e4bcd031bfabf42 | Vuln. Introduced | |
| https://git.kernel.org/stable/c/6fb92e9a52e3feae309a213950f21dfcd1eb0b40 | Vuln. Introduced |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2025-21671 | 2025-11-11 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2343172 | 2025-11-11 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 6.1.122 < 6.1.127 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.1.122 < 6.1.127" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 6.6.68 < 6.6.74 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.6.68 < 6.6.74" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 6.12.7 < 6.12.11 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.12.7 < 6.12.11" | en |
Affected
| ||||||