CVE-2025-38190 (GCVE-0-2025-38190)

Vulnerability from cvelistv5 – Published: 2025-07-04 13:37 – Updated: 2026-05-11 21:22
VLAI?
Title
atm: Revert atm_account_tx() if copy_from_iter_full() fails.
Summary
In the Linux kernel, the following vulnerability has been resolved: atm: Revert atm_account_tx() if copy_from_iter_full() fails. In vcc_sendmsg(), we account skb->truesize to sk->sk_wmem_alloc by atm_account_tx(). It is expected to be reverted by atm_pop_raw() later called by vcc->dev->ops->send(vcc, skb). However, vcc_sendmsg() misses the same revert when copy_from_iter_full() fails, and then we will leak a socket. Let's factorise the revert part as atm_return_tx() and call it in the failure path. Note that the corresponding sk_wmem_alloc operation can be found in alloc_tx() as of the blamed commit. $ git blame -L:alloc_tx net/atm/common.c c55fa3cccbc2c~
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 5e0d00992118e234ebf29d5145c1cc920342777e (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < c12430edd92fd49a4800b0f3fb395b50cb16bcc1 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 287b4f085d2ca3375cf1ee672af27410c64777e8 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 2252c539c43f9a1431a7e8b34e3c18e9dd77a96d (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 3902205eadf35db59dbc2186c2a98b9e6182efa5 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 3d828519bd69bfcaabdd942a872679617ef06739 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 7d6bc28cfe5c8e3a279b4b4bdeed6698b2702685 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 7851263998d4269125fd6cb3fdbfc7c6db853859 (git)
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Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 5.4.295 , ≤ 5.4.* (semver)
Unaffected: 5.10.239 , ≤ 5.10.* (semver)
Unaffected: 5.15.186 , ≤ 5.15.* (semver)
Unaffected: 6.1.142 , ≤ 6.1.* (semver)
Unaffected: 6.6.95 , ≤ 6.6.* (semver)
Unaffected: 6.12.35 , ≤ 6.12.* (semver)
Unaffected: 6.15.4 , ≤ 6.15.* (semver)
Unaffected: 6.16 , ≤ * (original_commit_for_fix)
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En vcc_sendmsg(), contabilizamos skb-\u0026gt;truesize como sk-\u0026gt;sk_wmem_alloc mediante atm_account_tx(). Se espera que sea revertido por atm_pop_raw(), posteriormente llamado por vcc-\u0026gt;dev-\u0026gt;ops-\u0026gt;send(vcc, skb). Sin embargo, vcc_sendmsg() no realiza la misma reversi\u00f3n cuando copy_from_iter_full() falla, y entonces se filtrar\u00e1 un socket. Factoricemos la parte de la reversi\u00f3n como atm_return_tx() y la llamemos en la ruta de error. Tenga en cuenta que la operaci\u00f3n sk_wmem_alloc correspondiente se puede encontrar en alloc_tx() a partir de la confirmaci\u00f3n culpable. $ git culpa -L:alloc_tx net/atm/common.c 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  }
}


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