CVE-2023-52810 (GCVE-0-2023-52810)

Vulnerability from cvelistv5 – Published: 2024-05-21 15:31 – Updated: 2026-08-05 09:11
VLAI
Title
fs/jfs: Add check for negative db_l2nbperpage
Summary
In the Linux kernel, the following vulnerability has been resolved: fs/jfs: Add check for negative db_l2nbperpage l2nbperpage is log2(number of blks per page), and the minimum legal value should be 0, not negative. In the case of l2nbperpage being negative, an error will occur when subsequently used as shift exponent. Syzbot reported this bug: UBSAN: shift-out-of-bounds in fs/jfs/jfs_dmap.c:799:12 shift exponent -16777216 is negative
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.4 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-1335 - Incorrect Bitwise Shift of Integer
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < cc61fcf7d1c99f148fe8ddfb5c6ed0bb75861f01 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 8f2964df6bfce9d92d81ca552010b8677af8d9dc (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < a81a56b4cbe3142cc99f6b98e8f9b3a631c768e1 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 524b4f203afcf87accfe387e846f33f916f0c907 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 5f148b16972e5f4592629b244d5109b15135f53f (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 0cb567e727339a192f9fd0db00781d73a91d15a6 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 491085258185ffc4fb91555b0dba895fe7656a45 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 1a7c53fdea1d189087544d9a606d249e93c4934b (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 525b861a008143048535011f3816d407940f4bfa (git)
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Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 4.14.331 , ≤ 4.14.* (semver)
Unaffected: 4.19.300 , ≤ 4.19.* (semver)
Unaffected: 5.4.262 , ≤ 5.4.* (semver)
Unaffected: 5.10.202 , ≤ 5.10.* (semver)
Unaffected: 5.15.140 , ≤ 5.15.* (semver)
Unaffected: 6.1.64 , ≤ 6.1.* (semver)
Unaffected: 6.5.13 , ≤ 6.5.* (semver)
Unaffected: 6.6.3 , ≤ 6.6.* (semver)
Unaffected: 6.7 , ≤ * (original_commit_for_fix)
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linux linux_kernel Affected: 1da177e4c3f4 , < cc61fcf7d1c9 (custom)
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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linux linux_kernel Affected: 1da177e4c3f4 , < 8f2964df6bfc (custom)
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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linux linux_kernel Affected: 1da177e4c3f4 , < a81a56b4cbe3 (custom)
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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linux linux_kernel Affected: 1da177e4c3f4 , < 524b4f203afc (custom)
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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linux linux_kernel Affected: 1da177e4c3f4 , < 5f148b16972e (custom)
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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linux linux_kernel Affected: 1da177e4c3f4 , < 0cb567e72733 (custom)
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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linux linux_kernel Affected: 1da177e4c3f4 , < 491085258185 (custom)
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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linux linux_kernel Affected: 1da177e4c3f4 , < 1a7c53fdea1d (custom)
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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linux linux_kernel Affected: 1da177e4c3f4 , < 525b861a0081 (custom)
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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linux linux_kernel Unaffected: 4.14.331 , ≤ 4.14.* (custom)
    cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
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linux linux_kernel Unaffected: 4.19.300 , ≤ 4.19.* (custom)
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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linux linux_kernel Unaffected: 5.4.262 , ≤ 5.4.* (custom)
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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linux linux_kernel Unaffected: 5.10.202 , ≤ 5.10.* (custom)
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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linux linux_kernel Unaffected: 5.15.140 , ≤ 5.15.* (custom)
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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linux linux_kernel Unaffected: 6.1.64 , ≤ 6.1.* (custom)
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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linux linux_kernel Unaffected: 6.5.13 , ≤ 6.5.* (custom)
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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linux linux_kernel Unaffected: 6.6.3 , ≤ 6.6.* (custom)
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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linux linux_kernel Unaffected: 6.7
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.262",
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                  "versionEndExcluding": "5.10.202",
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.140",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.64",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.5.13",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.3",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.7",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/jfs: Add check for negative db_l2nbperpage\n\nl2nbperpage is log2(number of blks per page), and the minimum legal\nvalue should be 0, not negative.\n\nIn the case of l2nbperpage being negative, an error will occur\nwhen subsequently used as shift exponent.\n\nSyzbot reported this bug:\n\nUBSAN: shift-out-of-bounds in fs/jfs/jfs_dmap.c:799:12\nshift exponent -16777216 is negative"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The bug is only reachable after a local mount of an attacker-crafted JFS image (mount \u2192 jfs_fill_super \u2192 jfs_mount \u2192 dbMount, then later dbAlloc/dbFree using BLKTODMAP); fs/jfs has no network or adjacent-protocol entry path.\nAC:L - dn_l2nbperpage is taken verbatim from the on-disk bmap descriptor into a signed int, so the attacker sets a negative shift amount deterministically; any subsequent allocation/free that calls BLKTODMAP hits the bug with no race or attacker-uncontrollable state.\nPR:L - As with sibling JFS crafted-image CVEs (e.g. CVE-2023-53222), an unprivileged local session user can attach the malicious image via udisks2/polkit/automount on desktops, kiosks, and shared workstations, then trigger dbAlloc/dbFree with ordinary file operations.\nUI:N - The attacker supplies the image, causes it to be mounted (including via automount/udisks on their own session), and drives allocation/free themselves; no separate victim action is required at exploitation time.\nS:U - Wrong metapage selection and allocator/metadata corruption remain inside the host kernel\u2019s security authority; this is not a VM escape, IOMMU bypass, or other cross-boundary impact.\nC:H - A negative db_l2nbperpage makes BLKTODMAP compute attacker-influenced logical block numbers so dbAlloc/dbFree read the wrong (still attacker-controlled) dmap metapage and walk its summary tree/bitmaps, enabling out-of-bounds reads that can be leveraged for disclosure.\nI:H - Subsequent dbAllocNext/dbAllocDmap/dbFreeDmap paths write wmap/tree/nfree and in-memory bmap state based on that wrong page and undefined shift results, corrupting heap-backed metapage and allocator state into a write primitive suitable for control-flow hijacking.\nA:H - Syzbot reported UBSAN shift-out-of-bounds in dbAlloc (panic under UBSAN_TRAP/panic_on_warn), and the corrupted metapage/allocator paths also produce kernel oopses and jfs_error filesystem shutdown."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T09:11:32.139Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/cc61fcf7d1c99f148fe8ddfb5c6ed0bb75861f01"
        },
        {
          "url": "https://git.kernel.org/stable/c/8f2964df6bfce9d92d81ca552010b8677af8d9dc"
        },
        {
          "url": "https://git.kernel.org/stable/c/a81a56b4cbe3142cc99f6b98e8f9b3a631c768e1"
        },
        {
          "url": "https://git.kernel.org/stable/c/524b4f203afcf87accfe387e846f33f916f0c907"
        },
        {
          "url": "https://git.kernel.org/stable/c/5f148b16972e5f4592629b244d5109b15135f53f"
        },
        {
          "url": "https://git.kernel.org/stable/c/0cb567e727339a192f9fd0db00781d73a91d15a6"
        },
        {
          "url": "https://git.kernel.org/stable/c/491085258185ffc4fb91555b0dba895fe7656a45"
        },
        {
          "url": "https://git.kernel.org/stable/c/1a7c53fdea1d189087544d9a606d249e93c4934b"
        },
        {
          "url": "https://git.kernel.org/stable/c/525b861a008143048535011f3816d407940f4bfa"
        }
      ],
      "title": "fs/jfs: Add check for negative db_l2nbperpage",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-52810",
    "datePublished": "2024-05-21T15:31:19.629Z",
    "dateReserved": "2024-05-21T15:19:24.248Z",
    "dateUpdated": "2026-08-05T09:11:32.139Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2023-52810",
      "date": "2026-08-05",
      "epss": "0.00259",
      "percentile": "0.1745"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-52810\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-21T16:15:19.270\",\"lastModified\":\"2026-06-17T06:43:38.120\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nfs/jfs: Add check for negative db_l2nbperpage\\n\\nl2nbperpage is log2(number of blks per page), and the minimum legal\\nvalue should be 0, not negative.\\n\\nIn the case of l2nbperpage being negative, an error will occur\\nwhen subsequently used as shift exponent.\\n\\nSyzbot reported this bug:\\n\\nUBSAN: shift-out-of-bounds in fs/jfs/jfs_dmap.c:799:12\\nshift exponent -16777216 is negative\"},{\"lang\":\"es\",\"value\":\" En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: fs/jfs: agregue verificaci\u00f3n para db_l2nbperpage negativo, l2nbperpage es log2 (n\u00famero de bloques por p\u00e1gina) y el valor m\u00ednimo legal debe ser 0, no negativo. En el caso de que l2nbperpage sea negativo, se producir\u00e1 un error cuando se utilice posteriormente como exponente de desplazamiento. Syzbot inform\u00f3 este error: UBSAN: desplazamiento fuera de los l\u00edmites en fs/jfs/jfs_dmap.c:799:12 el exponente de desplazamiento -16777216 es 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      "current_release_date": "2026-08-04T19:23:02+00:00",
      "cve": "CVE-2023-52810",
      "id": "CVE-2023-52810",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:known_affected": "14",
      "product_status:known_not_affected": "184",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: fs/jfs: Add check for negative db_l2nbperpage",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-52810.json",
      "version": "3"
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\"linux_kernel\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"5.15.140\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"5.15.*\"}], \"defaultStatus\": \"unknown\"}, {\"cpes\": [\"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*\"], \"vendor\": \"linux\", \"product\": \"linux_kernel\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"6.1.64\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"6.1.*\"}], \"defaultStatus\": \"unknown\"}, {\"cpes\": [\"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*\"], \"vendor\": \"linux\", \"product\": \"linux_kernel\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"6.5.13\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"6.5.*\"}], \"defaultStatus\": \"unknown\"}, {\"cpes\": [\"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*\"], \"vendor\": \"linux\", \"product\": \"linux_kernel\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"6.6.3\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"6.6.*\"}], \"defaultStatus\": \"unknown\"}, {\"cpes\": [\"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*\"], \"vendor\": \"linux\", \"product\": \"linux_kernel\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"6.7\"}], \"defaultStatus\": \"unknown\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-1335\", \"description\": \"CWE-1335 Incorrect Bitwise Shift of Integer\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-06-05T16:19:36.344Z\"}}], \"cna\": {\"title\": \"fs/jfs: Add check for negative db_l2nbperpage\", \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 7.8, \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"AV:L - The bug is only reachable after a local mount of an attacker-crafted JFS image (mount \\u2192 jfs_fill_super \\u2192 jfs_mount \\u2192 dbMount, then later dbAlloc/dbFree using BLKTODMAP); fs/jfs has no network or adjacent-protocol entry path.\\nAC:L - dn_l2nbperpage is taken verbatim from the on-disk bmap descriptor into a signed int, so the attacker sets a negative shift amount deterministically; any subsequent allocation/free that calls BLKTODMAP hits the bug with no race or attacker-uncontrollable state.\\nPR:L - As with sibling JFS crafted-image CVEs (e.g. CVE-2023-53222), an unprivileged local session user can attach the malicious image via udisks2/polkit/automount on desktops, kiosks, and shared workstations, then trigger dbAlloc/dbFree with ordinary file operations.\\nUI:N - The attacker supplies the image, causes it to be mounted (including via automount/udisks on their own session), and drives allocation/free themselves; no separate victim action is required at exploitation time.\\nS:U - Wrong metapage selection and allocator/metadata corruption remain inside the host kernel\\u2019s security authority; this is not a VM escape, IOMMU bypass, or other cross-boundary impact.\\nC:H - A negative db_l2nbperpage makes BLKTODMAP compute attacker-influenced logical block numbers so dbAlloc/dbFree read the wrong (still attacker-controlled) dmap metapage and walk its summary tree/bitmaps, enabling out-of-bounds reads that can be leveraged for disclosure.\\nI:H - Subsequent dbAllocNext/dbAllocDmap/dbFreeDmap paths write wmap/tree/nfree and in-memory bmap state based on that wrong page and undefined shift results, corrupting heap-backed metapage and allocator state into a write primitive suitable for control-flow hijacking.\\nA:H - Syzbot reported UBSAN shift-out-of-bounds in dbAlloc (panic under UBSAN_TRAP/panic_on_warn), and the corrupted metapage/allocator paths also produce kernel oopses and jfs_error filesystem shutdown.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"cc61fcf7d1c99f148fe8ddfb5c6ed0bb75861f01\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"8f2964df6bfce9d92d81ca552010b8677af8d9dc\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"a81a56b4cbe3142cc99f6b98e8f9b3a631c768e1\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"524b4f203afcf87accfe387e846f33f916f0c907\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"5f148b16972e5f4592629b244d5109b15135f53f\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"0cb567e727339a192f9fd0db00781d73a91d15a6\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"491085258185ffc4fb91555b0dba895fe7656a45\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"1a7c53fdea1d189087544d9a606d249e93c4934b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"525b861a008143048535011f3816d407940f4bfa\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/jfs/jfs_dmap.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.6.12\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"2.6.12\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.14.331\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.14.*\"}, {\"status\": \"unaffected\", \"version\": \"4.19.300\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.262\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.202\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.140\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.64\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.5.13\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.5.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.3\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.7\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/jfs/jfs_dmap.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/cc61fcf7d1c99f148fe8ddfb5c6ed0bb75861f01\"}, {\"url\": \"https://git.kernel.org/stable/c/8f2964df6bfce9d92d81ca552010b8677af8d9dc\"}, {\"url\": \"https://git.kernel.org/stable/c/a81a56b4cbe3142cc99f6b98e8f9b3a631c768e1\"}, {\"url\": \"https://git.kernel.org/stable/c/524b4f203afcf87accfe387e846f33f916f0c907\"}, {\"url\": \"https://git.kernel.org/stable/c/5f148b16972e5f4592629b244d5109b15135f53f\"}, {\"url\": \"https://git.kernel.org/stable/c/0cb567e727339a192f9fd0db00781d73a91d15a6\"}, {\"url\": \"https://git.kernel.org/stable/c/491085258185ffc4fb91555b0dba895fe7656a45\"}, {\"url\": \"https://git.kernel.org/stable/c/1a7c53fdea1d189087544d9a606d249e93c4934b\"}, {\"url\": \"https://git.kernel.org/stable/c/525b861a008143048535011f3816d407940f4bfa\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nfs/jfs: Add check for negative db_l2nbperpage\\n\\nl2nbperpage is log2(number of blks per page), and the minimum legal\\nvalue should be 0, not negative.\\n\\nIn the case of l2nbperpage being negative, an error will occur\\nwhen subsequently used as shift exponent.\\n\\nSyzbot reported this bug:\\n\\nUBSAN: shift-out-of-bounds in fs/jfs/jfs_dmap.c:799:12\\nshift exponent -16777216 is negative\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.14.331\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.300\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.262\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.202\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.140\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.64\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.5.13\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.3\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.7\", \"versionStartIncluding\": \"2.6.12\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T09:11:32.139Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-52810\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T09:11:32.139Z\", \"dateReserved\": \"2024-05-21T15:19:24.248Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-21T15:31:19.629Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.