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CVE-2026-98907btrfs: protect sb_write_pointer() with invalidate lock

Description

In the Linux kernel, the following vulnerability has been resolved: btrfs: protect sb_write_pointer() with invalidate lock sb_write_pointer() reads the super block from the block device page cache using read_cache_page_gfp(). This has the same race with BLKBSZSET as the one fixed by commit 3f29d661e568 ("btrfs: sync read disk super and set block size"). Take the mapping invalidate lock around read_cache_page_gfp() to serialize the read against block size changes.

Timeline

  1. ID reserved

    By Linux

  2. · 28 days later

    Published

  3. · 3 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)
0.16% · top 95% of all CVEs (14 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.

Affected products

  • Linux · Linux

    • affected 3c20917120ce61f2a123ca0810293872f4c6b5a4 – < 80cd97c5e90096d040a623851795eac92fbd0ff1
    • affected 3c20917120ce61f2a123ca0810293872f4c6b5a4 – < 123b9a545f4d0348e81f558a032bf2a93ee5722f

  • Linux · Linux

    • affected 6.15
    • unaffected < 6.15
    • unaffected 6.18.53 – ≤ 6.18.*
    • unaffected 7.2 – ≤ *

References

References2

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .