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CVE-2026-23326 PUBLISHED

In the Linux kernel, the following vulnerability has been resolved: xsk: Fix fragment node deletion to prevent buffer leak After commit b692bf9a7543 ("xsk: Get rid of xdp_buff_xsk::xskb_list_node"), the list_node field is reused for both the xskb pool list and the buffer free list, this causes a buffer leak as described below. xp_free() checks if a buffer is already on the free list using list_empty(&xskb->list_node). When list_del() is used to remove a node from the xskb pool list, it doesn't reinitialize the node pointers. This means list_empty() will return false even after the node has been removed, causing xp_free() to incorrectly skip adding the buffer to the free list. Fix this by using list_del_init() instead of list_del() in all fragment handling paths, this ensures the list node is reinitialized after removal, allowing the list_empty() to work correctly.

EPSS 0.02% · 4.5th percentile

Risk Scores

EPSS Score
0.02%
4.5th percentile

Affected Products

VendorProductVersions
linuxlinux_kernel6.13, 6.13, 6.13
LinuxLinuxb692bf9a7543af7ad11a59d182a3757578f0ba53, b692bf9a7543af7ad11a59d182a3757578f0ba53, b692bf9a7543af7ad11a59d182a3757578f0ba53

Timeline

References

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