CVE-2026-93256arm64: hibernate: mask DAIF before restoring hibernated kernel
- —Not scoredno CVSS score yet
- 0.22%Exploitation in 30 daysEPSS · top 88% 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: arm64: hibernate: mask DAIF before restoring hibernated kernel The arm64 hibernate code manages the exception masking in an unsound way, leading to potential crashes and/or warnings during resume. When a hibernation image is saved in `swsusp_arch_suspend()`, all DAIF exceptions are masked (by virtue of `local_daif_save()`), and the suspended image is saved assuming that all DAIF exceptions will remain masked when the image is restored. When a hibernation image is resumed by `swsusp_arch_resume()`, only interrupts are masked (by virtue of `local_irq_disable()` in `resume_target_kernel()`). When pseudo-NMI is enabled the DAIF.IF bits will be clear, and regardless of pseudo-NMI the DAIF.DA bits will be clear. This means that there are two problems: (1) It is possible to take Debug, SError, or pseudo-NMI exceptions during the resume process. This is unsafe, as during the resume process both the old ane new kernels will tranisently be in an inconsistent state, and swsusp_arch_suspend_exit() won't retain an executable mapping of any exception vectors. Any exception taken here will be fatal and silent. (2) When re-entering the resumed kernel, some DAIF bits will be clear unexpectedly. This permits Debug, SError, or pseudo-NMI exceptions to be taken for a short period while the resumed kernel is not yet in a consistent state. This is detected by CONFIG_ARM64_DEBUG_PRIORITY_MASKING. Avoid these issues by masking all DAIF exceptions during resume.
Timeline
ID reserved
By Linux
- 7 days later
· 7 days later
Published
- 25 days later
· 25 days 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
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.22% · top 88% of all CVEs (15 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected 82869ac57b5d3b550446932c918dbf2caf020c9e – < c9c671e9ab87b639720db8f7f8648bdf0f3bc8ec
- affected 82869ac57b5d3b550446932c918dbf2caf020c9e – < 099ad3edcef1d955d9f5d6aab16ae78ecdfd4cda
- affected 82869ac57b5d3b550446932c918dbf2caf020c9e – < 716c41bd476334afb943308be9ff2142e34461b7
- affected 82869ac57b5d3b550446932c918dbf2caf020c9e – < 5370853041a3cb53a125b77528586278f64b378b
- affected 82869ac57b5d3b550446932c918dbf2caf020c9e – < 290c5b0c9fc0c61fb1c41421ed2394f955206ea0
- affected 82869ac57b5d3b550446932c918dbf2caf020c9e – < 012823494e20c3cce622982ebd3fd6971be39ad2
- affected 82869ac57b5d3b550446932c918dbf2caf020c9e – < d736ace2c491623c9ab5e73744085e93e9ae3ebe
- affected 82869ac57b5d3b550446932c918dbf2caf020c9e – < 684bde100117931f4c51c644a95f42f2dab041bc
- affected 4.7
- unaffected < 4.7
- unaffected 5.10.270 – ≤ 5.10.*
- unaffected 5.15.221 – ≤ 5.15.*
- unaffected 6.1.188 – ≤ 6.1.*
- unaffected 6.6.157 – ≤ 6.6.*
- unaffected 6.12.110 – ≤ 6.12.*
- unaffected 6.18.52 – ≤ 6.18.*
- unaffected 7.2.6 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References8
- https://git.kernel.org/stable/c/c9c671e9ab87b639720db8f7f8648bdf0f3bc8ec (opens in a new tab)
- https://git.kernel.org/stable/c/099ad3edcef1d955d9f5d6aab16ae78ecdfd4cda (opens in a new tab)
- https://git.kernel.org/stable/c/716c41bd476334afb943308be9ff2142e34461b7 (opens in a new tab)
- https://git.kernel.org/stable/c/5370853041a3cb53a125b77528586278f64b378b (opens in a new tab)
- https://git.kernel.org/stable/c/290c5b0c9fc0c61fb1c41421ed2394f955206ea0 (opens in a new tab)
- https://git.kernel.org/stable/c/012823494e20c3cce622982ebd3fd6971be39ad2 (opens in a new tab)
- https://git.kernel.org/stable/c/d736ace2c491623c9ab5e73744085e93e9ae3ebe (opens in a new tab)
- https://git.kernel.org/stable/c/684bde100117931f4c51c644a95f42f2dab041bc (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-2026-86128 (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)
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[](https://cveledger.app/cve/CVE-2026-93256)Record last updated .