CVE-2025-12888
published 2025-11-21CVE-2025-12888: Vulnerability in X25519 constant-time cryptographic implementations due to timing side channels introduced by compiler optimizations and CPU architecture…
PriorityP342high7.5CVSS 3.1
AVNACLPRNUINSUCHINAN
EPSS
0.27%
19.4th percentile
Vulnerability in X25519 constant-time cryptographic implementations due to timing side channels introduced by compiler optimizations and CPU architecture limitations, specifically with the Xtensa-based ESP32 chips. If targeting Xtensa it is recommended to use the low memory implementations of X25519, which is now turned on as the default for Xtensa.
Affected
9 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | wolfssl | < wolfssl 5.8.4-1 (forky) | wolfssl 5.8.4-1 (forky) |
| msrc | azl3_mariadb_10.11.11-1_on_azure_linux_3.0 | — | — |
| msrc | cbl2_mariadb_10.6.21-1_on_cbl_mariner_2.0 | — | — |
| msrc | cbl_mariner_1.0_arm | — | — |
| msrc | cbl_mariner_1.0_x64 | — | — |
| msrc | cm1_kernel_5.4.91-3_on_cbl_mariner_1.0 | — | — |
| wolfssl | wolfssl | < 5.8.4 | 5.8.4 |
| wolfssl | wolfssl | — | — |
| wolfssl | wolfssl | >= 0 < 5.8.4-1 | 5.8.4-1 |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
nvdv4.01.0LOWCVSS:4.0/AV:P/AC:H/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
osv1.0LOW
vendor_msrc5.3MEDIUM
vendor_debian1.0LOW
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Microsoft
Constant Time Issue with Xtensa-based ESP32 and X22519
vendor_msrc·2025-11-11·CVSS 1.0
CVE-2025-12888 [LOW] CWE-203 Constant Time Issue with Xtensa-based ESP32 and X22519
Constant Time Issue with Xtensa-based ESP32 and X22519
Mariner: Mariner
wolfSSL: wolfSSL
Customer Action Required: Yes
Debian
CVE-2025-12888: wolfssl - Vulnerability in X25519 constant-time cryptographic implementations due to timin...
vendor_debian·2025·CVSS 1.0
CVE-2025-12888 [LOW] CVE-2025-12888: wolfssl - Vulnerability in X25519 constant-time cryptographic implementations due to timin...
Vulnerability in X25519 constant-time cryptographic implementations due to timing side channels introduced by compiler optimizations and CPU architecture limitations, specifically with the Xtensa-based ESP32 chips. If targeting Xtensa it is recommended to use the low memory implementations of X25519, which is now turned on as the default for Xtensa.
Scope: local
bookworm: open
bullseye: open
forky: resolved (fixed in 5.8.4-1)
sid: resolved (fixed in 5.8.4-1)
trixie: open
Microsoft
The VFIO PCI driver in the Linux kernel through 5.6.13 mishandles attempts to access disabled memory space.
vendor_msrc·2020-05-12·CVSS 5.3
CVE-2020-12888 [MEDIUM] CWE-755 The VFIO PCI driver in the Linux kernel through 5.6.13 mishandles attempts to access disabled memory space.
The VFIO PCI driver in the Linux kernel through 5.6.13 mishandles attempts to access disabled memory space.
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
mitre: mitre
Customer Action Required: Yes
Remedia
GHSA
GHSA-xmgq-3783-qgm4: Vulnerability in X25519 constant-time cryptographic implementations due to timing side channels introduced by compiler optimizations and CPU architect
ghsa_unreviewed·2025-11-22
CVE-2025-12888 [LOW] CWE-203 GHSA-xmgq-3783-qgm4: Vulnerability in X25519 constant-time cryptographic implementations due to timing side channels introduced by compiler optimizations and CPU architect
Vulnerability in X25519 constant-time cryptographic implementations due to timing side channels introduced by compiler optimizations and CPU architecture limitations, specifically with the Xtensa-based ESP32 chips. If targeting Xtensa it is recommended to use the low memory implementations of X25519, which is now turned on as the default for Xtensa.
OSV
CVE-2025-12888: Vulnerability in X25519 constant-time cryptographic implementations due to timing side channels introduced by compiler optimizations and CPU architect
osv·2025-11-21·CVSS 1.0
CVE-2025-12888 [LOW] CVE-2025-12888: Vulnerability in X25519 constant-time cryptographic implementations due to timing side channels introduced by compiler optimizations and CPU architect
Vulnerability in X25519 constant-time cryptographic implementations due to timing side channels introduced by compiler optimizations and CPU architecture limitations, specifically with the Xtensa-based ESP32 chips. If targeting Xtensa it is recommended to use the low memory implementations of X25519, which is now turned on as the default for Xtensa.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2025-11-21
Published