SB2026100701 - Out-of-bounds read in Linux kernel xfrm

Description

This security bulletin contains information about 1 vulnerability.

1) Out-of-bounds read (CVE-ID: CVE-2026-98372)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 0 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to trigger an out-of-bounds read of kernel stack memory.

The vulnerability exists due to an out-of-bounds read in iptfs_skb_reset_frag_walk() when processing an IP-TFS payload with an offset at or beyond the total length of the fragment data. A remote attacker can send a crafted IP-TFS (AGGFRAG) payload to advance the fragment index beyond the fixed-size stack array to trigger an out-of-bounds read of kernel stack memory.

Exploitation requires delivery to an IP-TFS security association. The receive path reaches the vulnerable function through iptfs_reassem_cont() and iptfs_skb_can_add_frags().

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/7e1c6884a0b494b7e3f204877f94c1e07a117bf7
• https://git.kernel.org/stable/c/d042487dc118e494db2e2c1382310255c90ff544
• https://git.kernel.org/stable/c/da56d0ee93d1bad779b0486f2fab92d1bc1f0cf3