PT-2025-8022 · Linux+1 · Linux Kernel+1

Ziyang Xuan · Published 2022-04-01 · Updated 2025-03-03 · CVE-2022-49094

Positive Technologies (AI Summary)

CVSS v3.1

7.1

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A slab-out-of-bounds bug has been identified in the Linux kernel, specifically in the decrypt internal function within the net/tls module. The issue arises from a mismatch in memory size allocation for tls ctx->rx.iv when using AES128-CCM, where tls set sw offload() sets the size to 12, but crypto aead ivsize() returns a size of 16 for "ccm(aes)". This discrepancy triggers a slab-out-of-bounds bug when memcpy() attempts to read 16 bytes from a 12-byte memory space. The bug can be traced to the decrypt internal+0x385/0xc40 function in the tls module.

Recommendations To resolve this issue, replace the crypto aead ivsize() call with prot->iv size + prot->salt size when copying the IV value in the TLS 1 3 VERSION scenario. This change should be applied to the decrypt internal function to prevent the slab-out-of-bounds bug. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Out of bounds Read

Unchecked Return Value

Weakness Enumeration

CWE-125

CWE-252

Related Identifiers

BDU:2026-03933

CVE-2022-49094

Affected Products

Astra Linux

Linux Kernel

References · 25

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49094.json · Exploit
• https://git.kernel.org/stable/c/589154d0f18945f41d138a5b4e49e518d294474b · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-49094 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2022-49094 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2022-49094 · Vendor Advisory
• https://git.kernel.org/stable/c/29be1816cbab9a0dc6243120939fd10a92753756 · Patch
• https://git.kernel.org/stable/c/6e2f1b033b17dedda51d465861b69e58317d6343 · Patch
• https://ubuntu.com/security/CVE-2022-49094 · Vendor Advisory
• https://git.kernel.org/stable/c/9381fe8c849cfbe50245ac01fc077554f6eaa0e2 · Patch
• https://git.kernel.org/stable/c/2b7d14c105dd8f6412eda5a91e1e6154653731e3 · Patch
• https://git.kernel.org/stable/c/2304660ab6c425df64d95301b601424c6a50f28b · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2022-49094 · Security Note
• https://cve.org/CVERecord?id=CVE-2022-49094 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-49094 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-03933 · Security Note