CVE-2026-46089zram: do not forget to endio for partial discard requests
- 5.5MediumCVSS base score
- 0.14%Exploitation in 30 daysEPSS · top 97% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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().
Timeline
ID reserved
By Linux
- 14 days later
· 14 days later
Published
- 5 months later
· 5 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
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.14% · top 97% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 0120dd6e4e202e19a0e011e486fb2da40a5ea279 – < 2d1f18efccdb8b29552399d024c36b705447e975
- affected 0120dd6e4e202e19a0e011e486fb2da40a5ea279 – < 35d3300f6357cfaa72db2721dc2b345b19bac5df
- affected 0120dd6e4e202e19a0e011e486fb2da40a5ea279 – < a02363f71a79b755daa78a70d6b217f9c13c8c85
- affected 0120dd6e4e202e19a0e011e486fb2da40a5ea279 – < 68ce397e8236088fc53b9532d383a722288c8194
- affected 0120dd6e4e202e19a0e011e486fb2da40a5ea279 – < e3668b371329ea036ff022ce8ecc82f8befcf003
- affected 6.4
- unaffected < 6.4
- unaffected 6.6.140 – ≤ 6.6.*
- unaffected 6.12.86 – ≤ 6.12.*
- unaffected 6.18.27 – ≤ 6.18.*
- unaffected 7.0.4 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References5
- https://git.kernel.org/stable/c/2d1f18efccdb8b29552399d024c36b705447e975 (opens in a new tab)
- https://git.kernel.org/stable/c/35d3300f6357cfaa72db2721dc2b345b19bac5df (opens in a new tab)
- https://git.kernel.org/stable/c/a02363f71a79b755daa78a70d6b217f9c13c8c85 (opens in a new tab)
- https://git.kernel.org/stable/c/68ce397e8236088fc53b9532d383a722288c8194 (opens in a new tab)
- https://git.kernel.org/stable/c/e3668b371329ea036ff022ce8ecc82f8befcf003 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-32472 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-46089)Record last updated .