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Vulnerability · Published Oct 21, 2024 · Assigned by Linux

CVE-2024-49855nbd: fix race between timeout and normal completion

Critical 9.8

In plain English

A critical-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 0.5% (higher than 40% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.5%top 59.7% 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: nbd: fix race between timeout and normal completion If request timetout is handled by nbd_requeue_cmd(), normal completion has to be stopped for avoiding to complete this requeued request, other use-after-free can be triggered. Fix the race by clearing NBD_CMD_INFLIGHT in nbd_requeue_cmd(), meantime make sure that cmd->lock is grabbed for clearing the flag and the requeue.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.115-1DEBIAN-CVE-2024-49855
Debian:13linux6.11.2-1DEBIAN-CVE-2024-49855
Debian:14linux6.11.2-1DEBIAN-CVE-2024-49855
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2024-49855
Ubuntu:24.04:LTSlinux6.8.0-54.56UBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2024-49855
Ubuntu:24.04:LTSlinux-aws6.8.0-1023.25UBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1023.25~22.04.1UBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2024-49855
Ubuntu:24.04:LTSlinux-azure6.8.0-1025.30UBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2024-49855
Ubuntu:24.04:LTSlinux-azure-6.116.11.0-1012.12~24.04.1UBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1025.30~22.04.1UBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2024-49855
Ubuntu:24.04:LTSlinux-azure-nvidia6.8.0-1014.15UBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2024-49855
Ubuntu:24.04:LTSlinux-gcp6.8.0-1024.26UBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2024-49855
Ubuntu:24.04:LTSlinux-gcp-6.116.11.0-1011.11~24.04.1UBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1024.26~22.04.1UBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2024-49855
Ubuntu:24.04:LTSlinux-gke6.8.0-1019.23UBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2024-49855
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1006.8UBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-57.59~22.04.1UBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2024-49855
Ubuntu:24.04:LTSlinux-ibm6.8.0-1022.22UBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1023.23~22.04.1UBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2024-49855
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-54.56.1UBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-54.56.1~22.04.1UBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2024-49855
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1022.25UBUNTU-CVE-2024-49855
Ubuntu:24.04:LTSlinux-nvidia-6.116.11.0-1007.7UBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1022.25~22.04.2UBUNTU-CVE-2024-49855
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1022.25.2UBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2024-49855
Ubuntu:24.04:LTSlinux-oem-6.116.11.0-1015.15UBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2024-49855
Ubuntu:24.04:LTSlinux-oem-6.86.8.0-1024.24UBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2024-49855
Ubuntu:24.04:LTSlinux-oracle6.8.0-1020.21UBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1020.21~22.04.1UBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2024-49855
Ubuntu:24.04:LTSlinux-raspi6.8.0-1019.23UBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2024-49855
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2024-49855
Ubuntu:24.04:LTSlinux-riscv6.8.0-53.55.1UBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-riscv-6.86.8.0-53.55.1~22.04.1UBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2024-49855
Ubuntu:24.04:LTSlinux-xilinx6.8.0-1017.18UBUNTU-CVE-2024-49855
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2024-49855

Affected products (as reported)

VendorProductVersions
Linux Linux 2895f1831e911ca87d4efdf43e35eb72a0c7e66e – before 9c25faf72d780a9c71081710cd48759d61ff6e9b2895f1831e911ca87d4efdf43e35eb72a0c7e66e – before 6e73b946a379a1dfbb62626af93843bdfb53753d2895f1831e911ca87d4efdf43e35eb72a0c7e66e – before 5236ada8ebbd9e7461f17477357582f5be4f46f72895f1831e911ca87d4efdf43e35eb72a0c7e66e – before 9a74c3e6c0d686c26ba2aab66d15ddb89dc139cc2895f1831e911ca87d4efdf43e35eb72a0c7e66e – before c9ea57c91f03bcad415e1a20113bdb2077bcf990cdf62c535a9bfd5ff0eef4b91669da39d8abc0c35171ef20bae852ff38f4cfdb368bcdcc744776d05.17.15 – before 5.18
Linux Linux 5.19

References