Lucene search

K
cve416baaa9-dc9f-4396-8d5f-8c081fb06d67CVE-2024-26689
HistoryApr 03, 2024 - 3:15 p.m.

CVE-2024-26689

2024-04-0315:15:52
416baaa9-dc9f-4396-8d5f-8c081fb06d67
web.nvd.nist.gov
43
linux kernel
ceph
vulnerability
use-after-free
encode_cap_msg
fs/ceph/caps.c
handle_cap_grant
refcount
race
resource
__send_cap
__prep_cap

6 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

10.2%

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.

Affected configurations

Vulners
Node
linuxlinux_kernelRange5.10.05.10.210
OR
linuxlinux_kernelRange5.11.05.15.149
OR
linuxlinux_kernelRange5.16.06.1.79
OR
linuxlinux_kernelRange6.2.06.6.18
OR
linuxlinux_kernelRange6.7.06.7.6
OR
linuxlinux_kernelRange6.8.0
VendorProductVersionCPE
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/ceph/caps.c"
    ],
    "versions": [
      {
        "version": "1da177e4c3f4",
        "lessThan": "8180d0c27b93",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f4",
        "lessThan": "70e329b44076",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f4",
        "lessThan": "f3f98d7d84b3",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f4",
        "lessThan": "ae20db45e482",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f4",
        "lessThan": "7958c1bf5b03",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f4",
        "lessThan": "cda4672da1c2",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/ceph/caps.c"
    ],
    "versions": [
      {
        "version": "5.10.210",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.149",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.79",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.18",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.7.6",
        "lessThanOrEqual": "6.7.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.8",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

6 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

10.2%