CVE-2024-26832 (GCVE-0-2024-26832)

Vulnerability from cvelistv5 – Published: 2024-04-17 10:10 – Updated: 2025-05-04 12:54
VLAI?
Title
mm: zswap: fix missing folio cleanup in writeback race path
Summary
In the Linux kernel, the following vulnerability has been resolved: mm: zswap: fix missing folio cleanup in writeback race path In zswap_writeback_entry(), after we get a folio from __read_swap_cache_async(), we grab the tree lock again to check that the swap entry was not invalidated and recycled. If it was, we delete the folio we just added to the swap cache and exit. However, __read_swap_cache_async() returns the folio locked when it is newly allocated, which is always true for this path, and the folio is ref'd. Make sure to unlock and put the folio before returning. This was discovered by code inspection, probably because this path handles a race condition that should not happen often, and the bug would not crash the system, it will only strand the folio indefinitely.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 2cab13f500a6333bd2b853783ac76be9e4956f8a , < 14f1992430ef9e647b02aa8ca12c5bcb9a1dffea (git)
Affected: 04fc7816089c5a32c29a04ec94b998e219dfb946 , < 6156277d1b26cb3fdb6fcbf0686ab78268571644 (git)
Affected: 04fc7816089c5a32c29a04ec94b998e219dfb946 , < e2891c763aa2cff74dd6b5e978411ccf0cf94abe (git)
Affected: 04fc7816089c5a32c29a04ec94b998e219dfb946 , < e3b63e966cac0bf78aaa1efede1827a252815a1d (git)
Affected: ba700ea13bf0105a4773c654f7d3bef8adb64ab2 (git)
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    Linux Linux Affected: 6.4
Unaffected: 0 , < 6.4 (semver)
Unaffected: 6.1.80 , ≤ 6.1.* (semver)
Unaffected: 6.6.19 , ≤ 6.6.* (semver)
Unaffected: 6.7.7 , ≤ 6.7.* (semver)
Unaffected: 6.8 , ≤ * (original_commit_for_fix)
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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