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CVE-2022-49167

Estado: ModificadaMedia (5.5)—

In the Linux kernel, the following vulnerability has been resolved:

btrfs: do not double complete bio on errors during compressed reads

I hit some weird panics while fixing up the error handling from btrfs_lookup_bio_sums(). Turns out the compression path will complete the bio we use if we set up any of the compression bios and then return an error, and then btrfs_submit_data_bio() will also call bio_endio() on the bio.

Fix this by making btrfs_submit_compressed_read() responsible for calling bio_endio() on the bio if there are any errors.

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Currently it was only doing it if we created the compression bios, otherwise it was depending on btrfs_submit_data_bio() to do the right thing. This creates the above problem, so fix up btrfs_submit_compressed_read() to always call bio_endio() in case of an error, and then simply return from btrfs_submit_data_bio() if we had to call btrfs_submit_compressed_read().

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2022-49167",
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        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
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  "published": "2025-02-26T07:00:53.837",
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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: do not double complete bio on errors during compressed reads\n\nI hit some weird panics while fixing up the error handling from\nbtrfs_lookup_bio_sums().  Turns out the compression path will complete\nthe bio we use if we set up any of the compression bios and then return\nan error, and then btrfs_submit_data_bio() will also call bio_endio() on\nthe bio.\n\nFix this by making btrfs_submit_compressed_read() responsible for\ncalling bio_endio() on the bio if there are any errors.  Currently it\nwas only doing it if we created the compression bios, otherwise it was\ndepending on btrfs_submit_data_bio() to do the right thing.  This\ncreates the above problem, so fix up btrfs_submit_compressed_read() to\nalways call bio_endio() in case of an error, and then simply return from\nbtrfs_submit_data_bio() if we had to call\nbtrfs_submit_compressed_read()."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: btrfs: no completar dos veces la biografía en caso de errores durante lecturas comprimidas Me encontré con algunos pánicos extraños mientras arreglaba la gestión de errores de btrfs_lookup_bio_sums(). Resulta que la ruta de compresión completará la biografía que usamos si configuramos alguna de las biografías de compresión y luego devolvemos un error, y luego btrfs_submit_data_bio() también llamará a bio_endio() en la biografía. Arregle esto haciendo que btrfs_submit_compressed_read() sea responsable de llamar a bio_endio() en la biografía si hay algún error. Actualmente solo lo hacía si creábamos la biografía de compresión, de lo contrario dependía de btrfs_submit_data_bio() para hacer lo correcto. Esto crea el problema mencionado anteriormente, así que corrija btrfs_submit_compressed_read() para que siempre llame a bio_endio() en caso de error, y luego simplemente regrese de btrfs_submit_data_bio() si tuviéramos que llamar a btrfs_submit_compressed_read()."
    }
  ],
  "lastModified": "2026-08-04T10:17:37.303",
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