Log in Start free

Vulnerability · Published Aug 26, 2024 · Assigned by Linux

CVE-2024-44939jfs: fix null ptr deref in dtInsertEntry

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 14% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.2%top 86.0% 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: jfs: fix null ptr deref in dtInsertEntry [syzbot reported] general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 PID: 5061 Comm: syz-executor404 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:dtInsertEntry+0xd0c/0x1780 fs/jfs/jfs_dtree.c:3713 ... [Analyze] In dtInsertEntry(), when the pointer h has the same value as p, after writing name in UniStrncpy_to_le(), p->header.flag will be cleared. This will cause the previously true judgment "p->header.flag & BT-LEAF" to change to no after writing the name operation, this leads to entering an incorrect branch and accessing the uninitialized object ih when judging this condition for the second time. [Fix] After got the page, check freelist first, if freelist == 0 then exit dtInsert() and return -EINVAL.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.112-1DEBIAN-CVE-2024-44939
Debian:12linux6.1.112-1DSA-5782-1
Debian:13linux6.10.6-1DEBIAN-CVE-2024-44939
Debian:14linux6.10.6-1DEBIAN-CVE-2024-44939
Ubuntu:22.04:LTSlinux5.15.0-156.166UBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux5.15.0-156.166USN-7774-1
Ubuntu:24.04:LTSlinux6.8.0-50.51UBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-aws5.15.0-1092.99UBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-aws5.15.0-1092.99USN-7774-1
Ubuntu:24.04:LTSlinux-aws6.8.0-1020.22UBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1020.22~22.04.1UBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-azure5.15.0-1096.105USN-7775-2
Ubuntu:22.04:LTSlinux-azure5.15.0-1096.105UBUNTU-CVE-2024-44939
Ubuntu:24.04:LTSlinux-azure6.8.0-1020.23UBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1020.23~22.04.1UBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1096.105.1UBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-gcp5.15.0-1092.101USN-7774-1
Ubuntu:22.04:LTSlinux-gcp5.15.0-1092.101UBUNTU-CVE-2024-44939
Ubuntu:24.04:LTSlinux-gcp6.8.0-1019.21UBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1019.21~22.04.1UBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-gke5.15.0-1089.95USN-7774-1
Ubuntu:22.04:LTSlinux-gke5.15.0-1089.95UBUNTU-CVE-2024-44939
Ubuntu:24.04:LTSlinux-gke6.8.0-1015.19UBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1075.83UBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1075.83USN-7774-1
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1002.4UBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-50.51~22.04.1UBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-ibm5.15.0-1086.89USN-7774-1
Ubuntu:22.04:LTSlinux-ibm5.15.0-1086.89UBUNTU-CVE-2024-44939
Ubuntu:24.04:LTSlinux-ibm6.8.0-1017.17UBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1017.17~22.04.1UBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1087.93UBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1087.93USN-7774-1
Ubuntu:22.04:LTSlinux-kvm5.15.0-1088.93UBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-kvm5.15.0-1088.93USN-7774-4
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-156.166UBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-156.166USN-7774-1
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-50.51.1UBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-50.51.1~22.04.1UBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1087.88UBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1087.88USN-7774-1
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1019.21UBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1019.21~22.04.1UBUNTU-CVE-2024-44939
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1019.21.1UBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1045.45UBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1045.45USN-7774-1
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1034.34USN-7774-5
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1034.34UBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2024-44939
Ubuntu:24.04:LTSlinux-oem-6.86.8.0-1018.18UBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-oracle5.15.0-1090.96USN-7774-1
Ubuntu:22.04:LTSlinux-oracle5.15.0-1090.96UBUNTU-CVE-2024-44939
Ubuntu:24.04:LTSlinux-oracle6.8.0-1017.18UBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1017.18~22.04.1UBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-raspi5.15.0-1086.89USN-7774-1
Ubuntu:22.04:LTSlinux-raspi5.15.0-1086.89UBUNTU-CVE-2024-44939
Ubuntu:24.04:LTSlinux-raspi6.8.0-1016.18UBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2024-44939
Ubuntu:24.04:LTSlinux-riscv6.8.0-50.51.1UBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-riscv-6.86.8.0-50.51.1~22.04.1UBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2024-44939
Ubuntu:24.04:LTSlinux-xilinx6.8.0-1017.18UBUNTU-CVE-2024-44939
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1056.60USN-7774-1
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1056.60UBUNTU-CVE-2024-44939

Affected products (as reported)

VendorProductVersions
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before f98bf80b20f4a930589cda48a35f751a64fe0dc21da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 53023ab11836ac56fd75f7a71ec1356e50920fa91da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 6ea10dbb1e6c58384136e9adfd75f81951e423f61da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 9c2ac38530d1a3ee558834dfa16c85a40fd0e7021da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before ce6dede912f064a855acf6f04a04cbb2c25b8c8c
Linux Linux 2.6.12

References