# CVE-2026-23211: linux: In the Linux kernel, the following vulnerability has been resolved:  mm, swap: restore swap_space attr aviod kernel p...

CVE-2026-23211 is fixed in linux on 1 platform by DEBIAN-CVE-2026-23211 (version 6.18.9-1), released February 18, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-23211
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0012
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 18, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  mm, swap: restore swap_space attr aviod kernel panic  commit 8b47299a411a ("mm, swap: mark swap address space ro and add context debug check") made the swap address space read-only.  It may lead to kernel panic if arch_prepare_to_swap returns a failure under heavy memory pressure as follows,  el1_abort+0x40/0x64 el1h_64_sync_handler+0x48/0xcc el1h_64_sync+0x84/0x88 errseq_set+0x4c/0xb8 (P) __filemap_set_wb_err+0x20/0xd0 shrink_folio_list+0xc20/0x11cc evict_folios+0x1520/0x1be4 try_to_shrink_lruvec+0x27c/0x3dc shrink_one+0x9c/0x228 shrink_node+0xb3c/0xeac do_try_to_free_pages+0x170/0x4f0 try_to_free_pages+0x334/0x534 __alloc_pages_direct_reclaim+0x90/0x158 __alloc_pages_slowpath+0x334/0x588 __alloc_frozen_pages_noprof+0x224/0x2fc __folio_alloc_noprof+0x14/0x64 vma_alloc_zeroed_movable_folio+0x34/0x44 do_pte_missing+0xad4/0x1040 handle_mm_fault+0x4a4/0x790 do_page_fault+0x288/0x5f8 do_translation_fault+0x38/0x54 do_mem_abort+0x54/0xa8  Restore swap address space as not ro to avoid the panic.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 6.18.9-1 | [DEBIAN-CVE-2026-23211](https://patchblox.com/security/data/fix/linux/debian-cve-2026-23211.md) | Feb 18, 2026 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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