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Vulnerability · Published May 21, 2024 · Assigned by Linux

CVE-2021-47336smackfs: restrict bytes count in smk_set_cipso()

High 7.8

In plain English

A high-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)7.8High
Exploit odds (30 days)0.2%top 84.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: smackfs: restrict bytes count in smk_set_cipso() Oops, I failed to update subject line. From 07571157c91b98ce1a4aa70967531e64b78e8346 Mon Sep 17 00:00:00 2001 Date: Mon, 12 Apr 2021 22:25:06 +0900 Subject: [PATCH] smackfs: restrict bytes count in smk_set_cipso() Commit 7ef4c19d245f3dc2 ("smackfs: restrict bytes count in smackfs write functions") missed that count > SMK_CIPSOMAX check applies to only format == SMK_FIXED24_FMT case.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux5.14.6-1DEBIAN-CVE-2021-47336
Debian:13linux5.14.6-1DEBIAN-CVE-2021-47336
Debian:14linux5.14.6-1DEBIAN-CVE-2021-47336
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2021-47336
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2021-47336
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2021-47336
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2021-47336
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2021-47336
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2021-47336
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2021-47336
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2021-47336
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2021-47336
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2021-47336
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2021-47336
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2021-47336
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2021-47336
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2021-47336
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2021-47336
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2021-47336
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2021-47336
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2021-47336
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2021-47336
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2021-47336
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2021-47336
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2021-47336
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2021-47336
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2021-47336

Affected products (as reported)

VendorProductVersions
Linux Linux f7112e6c9abf1c70f001dcf097c1d6e218a93f5c – before 5f9880403e6b71d56924748ba331daf836243fcaf7112e6c9abf1c70f001dcf097c1d6e218a93f5c – before 5c2dca9a7a7ff6a2df34158903515e2e4fd3d2b2f7112e6c9abf1c70f001dcf097c1d6e218a93f5c – before cbd87ba6a13891acf6180783f8234a8b7a3e3d4df7112e6c9abf1c70f001dcf097c1d6e218a93f5c – before 135122f174c357b7a3e58f40fa5792156c5e93e6f7112e6c9abf1c70f001dcf097c1d6e218a93f5c – before 3780348c1a0e14ffefcaf1fc521f815bcaac94b0f7112e6c9abf1c70f001dcf097c1d6e218a93f5c – before 8f5c773a2871cf446e3f36b2834fb25bbb28512bf7112e6c9abf1c70f001dcf097c1d6e218a93f5c – before 258fd821f69378453c071b9dd767b298810fc766f7112e6c9abf1c70f001dcf097c1d6e218a93f5c – before 49ec114a6e62d8d320037ce71c1aaf9650b3cafd
Linux Linux 3.5

References