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CVE-2022-49747

erofs/zmap.c: Fix incorrect offset calculation

Medium5.5EPSS 0.19%
Published
Updated
Reserved
Assigned by
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: erofs/zmap.c: Fix incorrect offset calculation Effective offset to add to length was being incorrectly calculated, which resulted in iomap->length being set to 0, triggering a WARN_ON in iomap_iter_done(). Fix that, and describe it in comments. This was reported as a crash by syzbot under an issue about a warning encountered in iomap_iter_done(), but unrelated to erofs. C reproducer: https://syzkaller.appspot.com/text?tag=ReproC&x=1037a6b2880000 Kernel config: https://syzkaller.appspot.com/text?tag=KernelConfig&x=e2021a61197ebe02 Dashboard link: https://syzkaller.appspot.com/bug?extid=a8e049cd3abd342936b6

Timeline

  1. ID reserved

    By Linux

  2. Published

  3. · 14 months later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2022-49747, by who scored it
Scored byCVSSScoreVector
NVDNVD · Analyzed3.1Medium5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS (exploitation in 30 days)
0.19% · top 91% of all CVEs (7 Nov 2026)
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.

Affected products

  • Linux · Linux

    • affected eadcd6b5a1eb39866ab8d8a3e4f2e51bc51a2350 – < 2144859229c1e74f52d3ea067338d314a83a8afb
    • affected eadcd6b5a1eb39866ab8d8a3e4f2e51bc51a2350 – < 9f31d8c889d9a4e47bfcc6c4537d0c9f89fe582c
    • affected eadcd6b5a1eb39866ab8d8a3e4f2e51bc51a2350 – < 6acd87d50998ef0afafc441613aeaf5a8f5c9eff

  • Linux · Linux

    • affected 5.15
    • unaffected < 5.15
    • unaffected 5.15.92 – ≤ 5.15.*
    • unaffected 6.1.10 – ≤ 6.1.*
    • unaffected 6.2 – ≤ *

References (3)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .