- Vulnerability/
- CVE-2024-26840
17/4/2024
17/4/2024
2/8/2024
CVE-2024-26840: cachefiles: fix memory leak in cachefiles_add_cache()
First published: Wed Apr 17 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: cachefiles: fix memory leak in cachefiles_add_cache() The following memory leak was reported after unbinding /dev/cachefiles: ================================================================== unreferenced object 0xffff9b674176e3c0 (size 192): comm "cachefilesd2", pid 680, jiffies 4294881224 hex dump (first 32 bytes): 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace (crc ea38a44b): [<ffffffff8eb8a1a5>] kmem_cache_alloc+0x2d5/0x370 [<ffffffff8e917f86>] prepare_creds+0x26/0x2e0 [<ffffffffc002eeef>] cachefiles_determine_cache_security+0x1f/0x120 [<ffffffffc00243ec>] cachefiles_add_cache+0x13c/0x3a0 [<ffffffffc0025216>] cachefiles_daemon_write+0x146/0x1c0 [<ffffffff8ebc4a3b>] vfs_write+0xcb/0x520 [<ffffffff8ebc5069>] ksys_write+0x69/0xf0 [<ffffffff8f6d4662>] do_syscall_64+0x72/0x140 [<ffffffff8f8000aa>] entry_SYSCALL_64_after_hwframe+0x6e/0x76 ================================================================== Put the reference count of cache_cred in cachefiles_daemon_unbind() to fix the problem. And also put cache_cred in cachefiles_add_cache() error branch to avoid memory leaks.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/linux | 5.10.218-1 5.10.221-1 6.1.94-1 6.1.99-1 6.9.10-1 6.9.12-1 | |
| ubuntu/linux | <4.15.0-227.239 | 4.15.0-227.239 |
| ubuntu/linux | <5.4.0-186.206 | 5.4.0-186.206 |
| ubuntu/linux | <5.15.0-112.122 | 5.15.0-112.122 |
| ubuntu/linux | <6.8~ | 6.8~ |
| ubuntu/linux | <4.4.0-257.291 | 4.4.0-257.291 |
| ubuntu/linux-aws | <4.15.0-1170.183 | 4.15.0-1170.183 |
| ubuntu/linux-aws | <5.4.0-1126.136 | 5.4.0-1126.136 |
| ubuntu/linux-aws | <5.15.0-1063.69 | 5.15.0-1063.69 |
| ubuntu/linux-aws | <4.4.0-1134.140 | 4.4.0-1134.140 |
| ubuntu/linux-aws | <6.8~ | 6.8~ |
| ubuntu/linux-aws | <4.4.0-1172.187 | 4.4.0-1172.187 |
| ubuntu/linux-aws-5.15 | <5.15.0-1063.69~20.04.1 | 5.15.0-1063.69~20.04.1 |
| ubuntu/linux-aws-5.15 | <6.8~ | 6.8~ |
| ubuntu/linux-aws-5.4 | <5.4.0-1126.136~18.04.1 | 5.4.0-1126.136~18.04.1 |
| ubuntu/linux-aws-5.4 | <6.8~ | 6.8~ |
| ubuntu/linux-aws-6.5 | <6.8~ | 6.8~ |
| ubuntu/linux-aws-fips | <6.8~ | 6.8~ |
| ubuntu/linux-aws-hwe | <6.8~ | 6.8~ |
| ubuntu/linux-aws-hwe | <4.15.0-1170.183~16.04.1 | 4.15.0-1170.183~16.04.1 |
| ubuntu/linux-azure | <5.4.0-1131.138 | 5.4.0-1131.138 |
| ubuntu/linux-azure | <5.15.0-1066.75 | 5.15.0-1066.75 |
| ubuntu/linux-azure | <4.15.0-1179.194~14.04.1 | 4.15.0-1179.194~14.04.1 |
| ubuntu/linux-azure | <6.8~ | 6.8~ |
| ubuntu/linux-azure-4.15 | <4.15.0-1179.194 | 4.15.0-1179.194 |
| ubuntu/linux-azure-4.15 | <6.8~ | 6.8~ |
| ubuntu/linux-azure-5.15 | <6.8~ | 6.8~ |
| ubuntu/linux-azure-5.4 | <5.4.0-1131.138~18.04.1 | 5.4.0-1131.138~18.04.1 |
| ubuntu/linux-azure-5.4 | <6.8~ | 6.8~ |
| ubuntu/linux-azure-6.5 | <6.8~ | 6.8~ |
| ubuntu/linux-azure-fde | <5.15.0-1067.76.1 | 5.15.0-1067.76.1 |
| ubuntu/linux-azure-fde | <6.8~ | 6.8~ |
| ubuntu/linux-azure-fde-5.15 | <5.15.0-1065.74~20.04.1.1 | 5.15.0-1065.74~20.04.1.1 |
| ubuntu/linux-azure-fde-5.15 | <6.8~ | 6.8~ |
| ubuntu/linux-azure-fips | <6.8~ | 6.8~ |
| ubuntu/linux-bluefield | <5.4.0-1086.93 | 5.4.0-1086.93 |
| ubuntu/linux-bluefield | <6.8~ | 6.8~ |
| ubuntu/linux-fips | <6.8~ | 6.8~ |
| ubuntu/linux-gcp | <5.4.0-1130.139 | 5.4.0-1130.139 |
| ubuntu/linux-gcp | <5.15.0-1062.70 | 5.15.0-1062.70 |
| ubuntu/linux-gcp | <6.8~ | 6.8~ |
| ubuntu/linux-gcp | <4.15.0-1164.181~16.04.1 | 4.15.0-1164.181~16.04.1 |
| ubuntu/linux-gcp-4.15 | <4.15.0-1164.181 | 4.15.0-1164.181 |
| ubuntu/linux-gcp-4.15 | <6.8~ | 6.8~ |
| ubuntu/linux-gcp-5.15 | <5.15.0-1062.70~20.04.1 | 5.15.0-1062.70~20.04.1 |
| ubuntu/linux-gcp-5.15 | <6.8~ | 6.8~ |
| ubuntu/linux-gcp-5.4 | <5.4.0-1130.139~18.04.1 | 5.4.0-1130.139~18.04.1 |
| ubuntu/linux-gcp-5.4 | <6.8~ | 6.8~ |
| ubuntu/linux-gcp-6.5 | <6.8~ | 6.8~ |
| ubuntu/linux-gcp-fips | <6.8~ | 6.8~ |
| ubuntu/linux-gke | <5.15.0-1060.66 | 5.15.0-1060.66 |
| ubuntu/linux-gke | <6.8~ | 6.8~ |
| ubuntu/linux-gkeop | <5.4.0-1093.97 | 5.4.0-1093.97 |
| ubuntu/linux-gkeop | <5.15.0-1046.53 | 5.15.0-1046.53 |
| ubuntu/linux-gkeop | <6.8~ | 6.8~ |
| ubuntu/linux-gkeop-5.15 | <5.15.0-1046.53~20.04.1 | 5.15.0-1046.53~20.04.1 |
| ubuntu/linux-gkeop-5.15 | <6.8~ | 6.8~ |
| ubuntu/linux-hwe | <6.8~ | 6.8~ |
| ubuntu/linux-hwe | <4.15.0-227.239~16.04.1 | 4.15.0-227.239~16.04.1 |
| ubuntu/linux-hwe-5.15 | <5.15.0-113.123~20.04.1 | 5.15.0-113.123~20.04.1 |
| ubuntu/linux-hwe-5.15 | <6.8~ | 6.8~ |
| ubuntu/linux-hwe-5.4 | <5.4.0-186.206~18.04.1 | 5.4.0-186.206~18.04.1 |
| ubuntu/linux-hwe-5.4 | <6.8~ | 6.8~ |
| ubuntu/linux-hwe-6.5 | <6.8~ | 6.8~ |
| ubuntu/linux-ibm | <5.4.0-1073.78 | 5.4.0-1073.78 |
| ubuntu/linux-ibm | <5.15.0-1056.59 | 5.15.0-1056.59 |
| ubuntu/linux-ibm | <6.8~ | 6.8~ |
| ubuntu/linux-ibm-5.15 | <5.15.0-1057.60~20.04.1 | 5.15.0-1057.60~20.04.1 |
| ubuntu/linux-ibm-5.15 | <6.8~ | 6.8~ |
| ubuntu/linux-ibm-5.4 | <5.4.0-1073.78~18.04.1 | 5.4.0-1073.78~18.04.1 |
| ubuntu/linux-ibm-5.4 | <6.8~ | 6.8~ |
| ubuntu/linux-intel | <6.8~ | 6.8~ |
| ubuntu/linux-intel-iotg | <5.15.0-1058.64 | 5.15.0-1058.64 |
| ubuntu/linux-intel-iotg | <6.8~ | 6.8~ |
| ubuntu/linux-intel-iotg-5.15 | <5.15.0-1058.64~20.04.1 | 5.15.0-1058.64~20.04.1 |
| ubuntu/linux-intel-iotg-5.15 | <6.8~ | 6.8~ |
| ubuntu/linux-iot | <5.4.0-1038.39 | 5.4.0-1038.39 |
| ubuntu/linux-iot | <6.8~ | 6.8~ |
| ubuntu/linux-kvm | <4.15.0-1154.159 | 4.15.0-1154.159 |
| ubuntu/linux-kvm | <5.4.0-1114.121 | 5.4.0-1114.121 |
| ubuntu/linux-kvm | <5.15.0-1060.65 | 5.15.0-1060.65 |
| ubuntu/linux-kvm | <6.8~ | 6.8~ |
| ubuntu/linux-kvm | <4.4.0-1135.145 | 4.4.0-1135.145 |
| ubuntu/linux-laptop | <6.8~ | 6.8~ |
| ubuntu/linux-lowlatency | <5.15.0-110.120 | 5.15.0-110.120 |
| ubuntu/linux-lowlatency | <6.8~ | 6.8~ |
| ubuntu/linux-lowlatency-hwe-5.15 | <5.15.0-110.120~20.04.1 | 5.15.0-110.120~20.04.1 |
| ubuntu/linux-lowlatency-hwe-5.15 | <6.8~ | 6.8~ |
| ubuntu/linux-lowlatency-hwe-6.5 | <6.8~ | 6.8~ |
| ubuntu/linux-lts-xenial | <4.4.0-257.291~14.04.1 | 4.4.0-257.291~14.04.1 |
| ubuntu/linux-lts-xenial | <6.8~ | 6.8~ |
| ubuntu/linux-nvidia | <5.15.0-1058.59 | 5.15.0-1058.59 |
| ubuntu/linux-nvidia | <6.8~ | 6.8~ |
| ubuntu/linux-nvidia-6.5 | <6.8~ | 6.8~ |
| ubuntu/linux-nvidia-6.8 | <6.8~ | 6.8~ |
| ubuntu/linux-nvidia-lowlatency | <6.8~ | 6.8~ |
| ubuntu/linux-oem-6.5 | <6.8~ | 6.8~ |
| ubuntu/linux-oem-6.8 | <6.8~ | 6.8~ |
| ubuntu/linux-oracle | <4.15.0-1133.144 | 4.15.0-1133.144 |
| ubuntu/linux-oracle | <5.4.0-1125.134 | 5.4.0-1125.134 |
| ubuntu/linux-oracle | <5.15.0-1061.67 | 5.15.0-1061.67 |
| ubuntu/linux-oracle | <6.8~ | 6.8~ |
| ubuntu/linux-oracle | <4.15.0-1133.144~16.04.1 | 4.15.0-1133.144~16.04.1 |
| ubuntu/linux-oracle-5.15 | <6.8~ | 6.8~ |
| ubuntu/linux-oracle-5.4 | <5.4.0-1125.134~18.04.1 | 5.4.0-1125.134~18.04.1 |
| ubuntu/linux-oracle-5.4 | <6.8~ | 6.8~ |
| ubuntu/linux-oracle-6.5 | <6.8~ | 6.8~ |
| ubuntu/linux-raspi | <5.4.0-1110.122 | 5.4.0-1110.122 |
| ubuntu/linux-raspi | <5.15.0-1058.61 | 5.15.0-1058.61 |
| ubuntu/linux-raspi | <6.8~ | 6.8~ |
| ubuntu/linux-raspi-5.4 | <5.4.0-1110.122~18.04.1 | 5.4.0-1110.122~18.04.1 |
| ubuntu/linux-raspi-5.4 | <6.8~ | 6.8~ |
| ubuntu/linux-riscv | <6.8~ | 6.8~ |
| ubuntu/linux-riscv-5.15 | <5.15.0-1059.63~20.04.1 | 5.15.0-1059.63~20.04.1 |
| ubuntu/linux-riscv-5.15 | <6.8~ | 6.8~ |
| ubuntu/linux-riscv-6.5 | <6.8~ | 6.8~ |
| ubuntu/linux-starfive | <6.8~ | 6.8~ |
| ubuntu/linux-starfive-6.5 | <6.8~ | 6.8~ |
| ubuntu/linux-xilinx-zynqmp | <5.4.0-1045.49 | 5.4.0-1045.49 |
| ubuntu/linux-xilinx-zynqmp | <5.15.0-1030.34 | 5.15.0-1030.34 |
| ubuntu/linux-xilinx-zynqmp | <6.8~ | 6.8~ |
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Reference Links
- https://git.kernel.org/stable/c/037d5a949b0455540ef9aab34c10ddf54b65d285
- https://git.kernel.org/stable/c/38e921616320d159336b0ffadb09e9fb4945c7c3
- https://git.kernel.org/stable/c/43eccc5823732ba6daab2511ed32dfc545a666d8
- https://git.kernel.org/stable/c/8b218e2f0a27a9f09428b1847b4580640b9d1e58
- https://git.kernel.org/stable/c/94965be37add0983672e48ecb33cdbda92b62579
- https://git.kernel.org/stable/c/9cac69912052a4def571fedf1cb9bb4ec590e25a
- https://git.kernel.org/stable/c/cb5466783793e66272624cf71925ae1d1ba32083
- https://git.kernel.org/stable/c/e21a2f17566cbd64926fb8f16323972f7a064444
- https://launchpad.net/bugs/cve/CVE-2024-26840
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
- https://git.kernel.org/linus/e21a2f17566cbd64926fb8f16323972f7a064444
- https://security-tracker.debian.org/tracker/CVE-2024-26840
- https://www.cve.org/CVERecord?id=CVE-2024-26840
- https://git.kernel.org/linus/e21a2f17566cbd64926fb8f16323972f7a064444 (6.8-rc6)
- https://ubuntu.com/security/notices/USN-6820-1
- https://ubuntu.com/security/notices/USN-6821-1
- https://ubuntu.com/security/notices/USN-6821-2
- https://ubuntu.com/security/notices/USN-6828-1
- https://ubuntu.com/security/notices/USN-6820-2
- https://ubuntu.com/security/notices/USN-6821-3
- https://ubuntu.com/security/notices/USN-6831-1
- https://ubuntu.com/security/notices/USN-6821-4
- https://ubuntu.com/security/notices/USN-6867-1
- https://ubuntu.com/security/notices/USN-6871-1
- https://ubuntu.com/security/notices/USN-6892-1
- https://ubuntu.com/security/notices/USN-6919-1
- https://ubuntu.com/security/notices/USN-6926-1
- https://ubuntu.com/security/notices/USN-6938-1
- https://ubuntu.com/security/notices/USN-6926-2
- https://nvd.nist.gov/vuln/detail/CVE-2024-26840
- https://git.kernel.org/linus/9ae326a69004dea8af2dae4fde58de27db700a8d
- https://ubuntu.com/security/CVE-2024-26840
Parent vulnerabilities
(Appears in the following advisories)
- agent/title
- agent/severity
- agent/type
- agent/remedy
- agent/first-publish-date
- collector/launchpad-cve
- source/Launchpad
- agent/author
- agent/description
- agent/event
- collector/nvd-api
- source/NVD
- collector/nvd-cve
- collector/security-tracker-debian
- source/Debian
- agent/software-canonical-lookup
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/references
- agent/softwarecombine
- agent/tags
- collector/usn-cve
- source/Ubuntu
- package-manager/debian
- package-manager/ubuntu