Description
In the Linux kernel, the following vulnerability has been resolved: ceph: prevent use-after-free in encode_cap_msg() In fs/ceph/caps.c, in encode_cap_msg(), "use after free" error was caught by KASAN at this line - 'ceph_buffer_get(arg->xattr_buf);'. This implies before the refcount could be increment here, it was freed. In same file, in "handle_cap_grant()" refcount is decremented by this line - 'ceph_buffer_put(ci->i_xattrs.blob);'. It appears that a race occurred and resource was freed by the latter line before the former line could increment it. encode_cap_msg() is called by __send_cap() and __send_cap() is called by ceph_check_caps() after calling __prep_cap(). __prep_cap() is where arg->xattr_buf is assigned to ci->i_xattrs.blob. This is the spot where the refcount must be increased to prevent "use after free" error.
Details
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| linux | — | 5.15.0-106.116 |
| linux-allwinner-5.19 | — | — |
| linux-aws | — | 5.15.0-1061.67 |
| linux-aws-5.0 | — | — |
| linux-aws-5.11 | — | — |
| linux-aws-5.13 | — | — |
| linux-aws-5.15 | — | 5.15.0-1061.67~20.04.1 |
| linux-aws-5.19 | — | — |
| linux-aws-5.3 | — | — |
| linux-aws-5.4 | — | 5.4.0-1145.155~18.04.1 |
| linux-aws-5.8 | — | — |
| linux-aws-6.2 | — | — |
| linux-aws-6.5 | — | 6.5.0-1023.23~22.04.1 |
| linux-aws-fips | — | 5.15.0-1061.67+fips1 |
| linux-aws-hwe | — | 4.15.0-1180.193~16.04.1 |
| linux-azure | — | 5.15.0-1063.72 |
| linux-azure-4.15 | — | 4.15.0-1188.203 |
| linux-azure-5.11 | — | — |
| linux-azure-5.13 | — | — |
| linux-azure-5.15 | — | 5.15.0-1063.72~20.04.1 |
| linux-azure-5.19 | — | — |
| linux-azure-5.3 | — | — |
| linux-azure-5.4 | — | 5.4.0-1150.157~18.04.1 |
| linux-azure-5.8 | — | — |
| linux-azure-6.2 | — | — |
| linux-azure-6.5 | — | 6.5.0-1024.25~22.04.1 |
| linux-azure-edge | — | — |
| linux-azure-fde | — | — |
| linux-azure-fde-5.19 | — | — |
| linux-azure-fde-6.2 | — | — |
| linux-azure-fde-6.8 | — | — |
| linux-azure-fips | — | 5.15.0-1063.72+fips1 |
| linux-bluefield | — | — |
| linux-fips | — | 5.15.0-106.116+fips1 |
| linux-gcp | — | 5.15.0-1059.67 |
| linux-gcp-4.15 | — | 4.15.0-1173.190 |
| linux-gcp-5.11 | — | — |
| linux-gcp-5.13 | — | — |
| linux-gcp-5.15 | — | 5.15.0-1059.67~20.04.1 |
| linux-gcp-5.19 | — | — |
| linux-gcp-5.3 | — | — |
| linux-gcp-5.4 | — | 5.4.0-1148.157~18.04.1 |
| linux-gcp-5.8 | — | — |
| linux-gcp-6.2 | — | — |
| linux-gcp-6.5 | — | 6.5.0-1024.26~22.04.1 |
| linux-gcp-fips | — | 5.15.0-1059.67+fips1 |
| linux-gke | — | 5.15.0-1058.63 |
| linux-gke-4.15 | — | — |
| linux-gke-5.15 | — | — |
| linux-gke-5.4 | — | — |
| linux-gkeop | — | 5.15.0-1044.51 |
| linux-gkeop-5.15 | — | 5.15.0-1044.51~20.04.1 |
| linux-gkeop-5.4 | — | — |
| linux-hwe | — | — |
| linux-hwe-5.11 | — | — |
| linux-hwe-5.13 | — | — |
| linux-hwe-5.15 | — | 5.15.0-106.116~20.04.1 |
| linux-hwe-5.19 | — | — |
| linux-hwe-5.4 | — | 5.4.0-215.235~18.04.1 |
| linux-hwe-5.8 | — | — |
| linux-hwe-6.2 | — | — |
| linux-hwe-6.5 | — | 6.5.0-44.44~22.04.1 |
| linux-hwe-edge | — | — |
| linux-ibm | — | 5.15.0-1054.57 |
| linux-ibm-5.15 | — | 5.15.0-1054.57~20.04.1 |
| linux-ibm-5.4 | — | 5.4.0-1092.97~18.04.1 |
| linux-intel-5.13 | — | — |
| linux-intel-iot-realtime | — | 5.15.0-1054.56 |
| linux-intel-iotg | — | 5.15.0-1057.63 |
| linux-intel-iotg-5.15 | — | 5.15.0-1058.64~20.04.1 |
| linux-iot | — | 5.4.0-1051.54 |
| linux-kvm | — | 5.15.0-1058.63 |
| linux-lowlatency | — | 5.15.0-106.116 |
| linux-lowlatency-hwe-5.15 | — | 5.15.0-106.116~20.04.1 |
| linux-lowlatency-hwe-5.19 | — | — |
| linux-lowlatency-hwe-6.2 | — | — |
| linux-lowlatency-hwe-6.5 | — | 6.5.0-44.44.1~22.04.1 |
| linux-lts-xenial | — | 4.4.0-268.302~14.04.1 |
| linux-nvidia | — | 5.15.0-1054.55 |
| linux-nvidia-6.2 | — | — |
| linux-nvidia-6.5 | — | 6.5.0-1023.24 |
| linux-nvidia-tegra | — | 5.15.0-1026.26 |
| linux-nvidia-tegra-5.15 | — | 5.15.0-1027.27~20.04.1 |
| linux-nvidia-tegra-igx | — | 5.15.0-1015.15 |
| linux-oem | — | — |
| linux-oem-5.10 | — | — |
| linux-oem-5.13 | — | — |
| linux-oem-5.14 | — | — |
| linux-oem-5.17 | — | — |
| linux-oem-5.6 | — | — |
| linux-oem-6.0 | — | — |
| linux-oem-6.1 | — | — |
| linux-oem-6.5 | — | 6.5.0-1027.28 |
| linux-oracle | — | 5.15.0-1059.65 |
| linux-oracle-5.0 | — | — |
| linux-oracle-5.11 | — | — |
| linux-oracle-5.13 | — | — |
| linux-oracle-5.15 | — | 5.15.0-1059.65~20.04.1 |
| linux-oracle-5.3 | — | — |
| linux-oracle-5.4 | — | 5.4.0-1143.153~18.04.1 |
| linux-oracle-5.8 | — | — |
| linux-oracle-6.5 | — | 6.5.0-1026.26~22.04.1 |
| linux-raspi | — | 5.15.0-1054.57 |
| linux-raspi-5.4 | — | 5.4.0-1129.142~18.04.1 |
| linux-raspi-realtime | — | 6.8.0-2001.1 |
| linux-raspi2 | — | — |
| linux-realtime | — | 5.15.0-1062.70 |
| linux-riscv | — | — |
| linux-riscv-5.11 | — | — |
| linux-riscv-5.15 | — | 5.15.0-1057.61~20.04.1 |
| linux-riscv-5.19 | — | — |
| linux-riscv-5.8 | — | — |
| linux-riscv-6.5 | — | — |
| linux-starfive-5.19 | — | — |
| linux-starfive-6.2 | — | — |
| linux-starfive-6.5 | — | 6.5.0-1017.18~22.04.1 |
| linux-xilinx-zynqmp | — | 5.15.0-1030.34 |
References
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