CVE-2023-52616

MEDIUM5.5

crypto: lib/mpi - Fix unexpected pointer access in mpi_ec_init

Published Mar 18, 2024

Modified 8 months ago

Details

In the Linux kernel, the following vulnerability has been resolved:

crypto: lib/mpi - Fix unexpected pointer access in mpi_ec_init

When the mpi_ec_ctx structure is initialized, some fields are not cleared, causing a crash when referencing the field when the structure was released. Initially, this issue was ignored because memory for mpi_ec_ctx is allocated with the __GFP_ZERO flag. For example, this error will be triggered when calculating the Za value for SM2 separately.

References

WEBhttps://git.kernel.org/stable/c/0c3687822259a7628c85cd21a3445cbe3c367165 WEBhttps://git.kernel.org/stable/c/2bb86817b33c9d704e127f92b838035a72c315b6 WEBhttps://git.kernel.org/stable/c/7abdfd45a650c714d5ebab564bb1b988f14d9b49 WEBhttps://git.kernel.org/stable/c/7ebf812b7019fd2d4d5a7ca45ef4bf3a6f4bda0a WEBhttps://git.kernel.org/stable/c/ba3c5574203034781ac4231acf117da917efcd2a WEBhttps://git.kernel.org/stable/c/bb44477d4506e52785693a39f03cdc6a2c5e8598 WEBhttps://lists.debian.org/debian-lts-announce/2024/06/msg00017.html ADVISORYhttps://www.cve.org/CVERecord?id=CVE-2023-52616

CVSS Analysis

CVSS v3.1

5.5

Exploitability

Attack Vector

LocalAV:L

Attack Complexity

LowAC:L

Privileges Required

LowPR:L

User Interaction

NoneUI:N

Scope

UnchangedS:U

Impact

Confidentiality

NoneC:N

Integrity

NoneI:N

Availability

HighA:H

5.5/CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Ecosystems

Timeline

PublishedMar 18, 2024

ModifiedMay 4, 2025