CVE-2026-46089 (GCVE-0-2026-46089)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:58 – Updated: 2026-06-14 17:53
VLAI
Title
zram: do not forget to endio for partial discard requests
Summary
In the Linux kernel, the following vulnerability has been resolved: zram: do not forget to endio for partial discard requests As reported by Qu Wenruo and Avinesh Kumar, the following getconf PAGESIZE 65536 blkdiscard -p 4k /dev/zram0 takes literally forever to complete. zram doesn't support partial discards and just returns immediately w/o doing any discard work in such cases. The problem is that we forget to endio on our way out, so blkdiscard sleeps forever in submit_bio_wait(). Fix this by jumping to end_bio label, which does bio_endio().
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 0120dd6e4e202e19a0e011e486fb2da40a5ea279 , < 2d1f18efccdb8b29552399d024c36b705447e975 (git)
Affected: 0120dd6e4e202e19a0e011e486fb2da40a5ea279 , < 35d3300f6357cfaa72db2721dc2b345b19bac5df (git)
Affected: 0120dd6e4e202e19a0e011e486fb2da40a5ea279 , < a02363f71a79b755daa78a70d6b217f9c13c8c85 (git)
Affected: 0120dd6e4e202e19a0e011e486fb2da40a5ea279 , < 68ce397e8236088fc53b9532d383a722288c8194 (git)
Affected: 0120dd6e4e202e19a0e011e486fb2da40a5ea279 , < e3668b371329ea036ff022ce8ecc82f8befcf003 (git)
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Linux Linux Affected: 6.4
Unaffected: 0 , < 6.4 (semver)
Unaffected: 6.6.140 , ≤ 6.6.* (semver)
Unaffected: 6.12.86 , ≤ 6.12.* (semver)
Unaffected: 6.18.27 , ≤ 6.18.* (semver)
Unaffected: 7.0.4 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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}



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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.