{
  "threat_severity" : "Moderate",
  "public_date" : "2024-04-03T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: ext4: avoid allocating blocks from corrupted group in ext4_mb_try_best_found()",
    "id" : "2273236",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2273236"
  },
  "cvss3" : {
    "cvss3_base_score" : "5.5",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-229",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\next4: avoid allocating blocks from corrupted group in ext4_mb_try_best_found()\nDetermine if the group block bitmap is corrupted before using ac_b_ex in\next4_mb_try_best_found() to avoid allocating blocks from a group with a\ncorrupted block bitmap in the following concurrency and making the\nsituation worse.\next4_mb_regular_allocator\next4_lock_group(sb, group)\next4_mb_good_group\n// check if the group bbitmap is corrupted\next4_mb_complex_scan_group\n// Scan group gets ac_b_ex but doesn't use it\next4_unlock_group(sb, group)\next4_mark_group_bitmap_corrupted(group)\n// The block bitmap was corrupted during\n// the group unlock gap.\next4_mb_try_best_found\next4_lock_group(ac->ac_sb, group)\next4_mb_use_best_found\nmb_mark_used\n// Allocating blocks in block bitmap corrupted group", "A vulnerability was found in the ext4_mb_try_best_found() function in the Linux kernel. This issue could lead to memory corruption or crashes due to the allocation of blocks from a group with a corrupted block bitmap." ],
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2024-08-08T00:00:00Z",
    "advisory" : "RHSA-2024:5102",
    "cpe" : "cpe:/a:redhat:enterprise_linux:8::nfv",
    "package" : "kernel-rt-0:4.18.0-553.16.1.rt7.357.el8_10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2024-08-08T00:00:00Z",
    "advisory" : "RHSA-2024:5101",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8",
    "package" : "kernel-0:4.18.0-553.16.1.el8_10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support",
    "release_date" : "2024-09-18T00:00:00Z",
    "advisory" : "RHSA-2024:6753",
    "cpe" : "cpe:/o:redhat:rhel_aus:8.6",
    "package" : "kernel-0:4.18.0-372.123.1.el8_6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.6 Telecommunications Update Service",
    "release_date" : "2024-09-18T00:00:00Z",
    "advisory" : "RHSA-2024:6753",
    "cpe" : "cpe:/o:redhat:rhel_tus:8.6",
    "package" : "kernel-0:4.18.0-372.123.1.el8_6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions",
    "release_date" : "2024-09-18T00:00:00Z",
    "advisory" : "RHSA-2024:6753",
    "cpe" : "cpe:/o:redhat:rhel_e4s:8.6",
    "package" : "kernel-0:4.18.0-372.123.1.el8_6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.8 Extended Update Support",
    "release_date" : "2024-08-13T00:00:00Z",
    "advisory" : "RHSA-2024:5255",
    "cpe" : "cpe:/o:redhat:rhel_eus:8.8",
    "package" : "kernel-0:4.18.0-477.67.1.el8_8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2024-07-31T00:00:00Z",
    "advisory" : "RHSA-2024:4928",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-427.28.1.el9_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2024-07-31T00:00:00Z",
    "advisory" : "RHSA-2024:4928",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-427.28.1.el9_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.2 Extended Update Support",
    "release_date" : "2024-07-24T00:00:00Z",
    "advisory" : "RHSA-2024:4823",
    "cpe" : "cpe:/a:redhat:rhel_eus:9.2",
    "package" : "kernel-0:5.14.0-284.75.1.el9_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.2 Extended Update Support",
    "release_date" : "2024-07-24T00:00:00Z",
    "advisory" : "RHSA-2024:4831",
    "cpe" : "cpe:/a:redhat:rhel_eus:9.2::nfv",
    "package" : "kernel-rt-0:5.14.0-284.75.1.rt14.360.el9_2"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Out of support scope",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Out of support scope",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Out of support scope",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2024-26773\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-26773\nhttps://lore.kernel.org/linux-cve-announce/2024040308-CVE-2024-26773-a314@gregkh/T" ],
  "name" : "CVE-2024-26773",
  "csaw" : false
}