CVE-2026-53227
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: net: openvswitch: fix possible kfree_skb of ERR_PTR After the patch in the "Fixes" tag, the allocation of the "reply" skb can happen either before or after locking the ovs_mutex. However, error cleanups still follow the classical reversed order, assuming "reply" is allocated before locking: it is freed after unlocking. If "reply" allocation happens after locking the mutex and it fails, "reply" is left with an ERR_PTR, and execution jumps to the correspondent cleanup stage which will try to free an invalid pointer. Fix this by setting the pointer to NULL after having saved its error value.
Severity
MEDIUM
CVSS score
5.5
(v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-06-25 09:16:40.520000
Last modified
2026-11-06 17:18:14.973000
View original CVE JSON
{
"id": "CVE-2026-53227",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-06-25T09:16:40.520",
"lastModified": "2026-11-06T17:18:14.973",
"vulnStatus": "Modified",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: openvswitch: fix possible kfree_skb of ERR_PTR\n\nAfter the patch in the \"Fixes\" tag, the allocation of the \"reply\" skb\ncan happen either before or after locking the ovs_mutex.\n\nHowever, error cleanups still follow the classical reversed order,\nassuming \"reply\" is allocated before locking: it is freed after unlocking.\n\nIf \"reply\" allocation happens after locking the mutex and it fails,\n\"reply\" is left with an ERR_PTR, and execution jumps to the correspondent\ncleanup stage which will try to free an invalid pointer.\n\nFix this by setting the pointer to NULL after having saved its error\nvalue."
}
],
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"id": "CVE-2026-53227",
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