CVE-2026-46089zram: do not forget to endio for partial discard requests
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No exploitation reported and no EPSS estimate yet.
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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().
- CVSS
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Analyzed
- Record last updated
- Jun 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 0120dd6e4e202e19a0e011e486fb2da40a5ea279 builds before 2d1f18efccdb8b29552399d024c36b705447e975; 0120dd6e4e202e19a0e011e486fb2da40a5ea279 builds before 35d3300f6357cfaa72db2721dc2b345b19bac5df; from 0120dd6e4e202e19a0e011e486fb2da40a5ea279 before a02363f71a79b755daa78a70d6b217f9c13c8c85; 0120dd6e4e202e19a0e011e486fb2da40a5ea279 builds before 68ce397e8236088fc53b9532d383a722288c8194; from 0120dd6e4e202e19a0e011e486fb2da40a5ea279 before e3668b371329ea036ff022ce8ecc82f8befcf003 | CNA record |
linux linux_kernel linux:linux_kernel | from 6.4 before 6.6.140; from 6.7 before 6.12.86; from 6.13 before 6.18.27; from 6.19 before 7.0.4 | NVD |
References
- https://git.kernel.org/stable/c/2d1f18efccdb8b29552399d024c36b705447e975patch
- https://git.kernel.org/stable/c/35d3300f6357cfaa72db2721dc2b345b19bac5dfpatch
- https://git.kernel.org/stable/c/a02363f71a79b755daa78a70d6b217f9c13c8c85patch
- https://git.kernel.org/stable/c/68ce397e8236088fc53b9532d383a722288c8194patch
- https://git.kernel.org/stable/c/e3668b371329ea036ff022ce8ecc82f8befcf003patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.