CVE-2026-53225sctp: fix uninit-value in __sctp_rcv_asconf_lookup()
Updated under an hour ago ()
Does this affect you?
It affects Linux and 2 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
In the Linux kernel, the following vulnerability has been resolved: sctp: fix uninit-value in __sctp_rcv_asconf_lookup() __sctp_rcv_asconf_lookup() in net/sctp/input.c only checks that the ASCONF chunk can hold the ADDIP header and a parameter header, then calls af->from_addr_param(), which reads the full address (16 bytes for IPv6) trusting the parameter's declared length. An unauthenticated peer can send a truncated trailing ASCONF chunk that declares an IPv6 address parameter but stops after the 4-byte parameter header; reached from the no-association lookup path, from_addr_param() then reads uninitialized bytes past the parameter. Impact: an unauthenticated SCTP peer makes the receive path read up to 16 bytes of uninitialized memory past a truncated ASCONF address parameter. The sibling __sctp_rcv_init_lookup() bounds parameters with sctp_walk_params(); this path open-codes the fetch and omits the bound. Verify the whole address parameter lies within the chunk before from_addr_param() reads it, the same class of fix as commit 51e5ad549c43 ("net: sctp: fix KMSAN uninit-value in sctp_inq_pop").
- CVSS
- 9.1 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from df21857714398acb8b24a8bb5a6d2286dd9c59ef before 446e0ecd845abc394b24ae2030a883572bec9d16; from df21857714398acb8b24a8bb5a6d2286dd9c59ef before 928dd94db23e8ba340f83d68f7f24d831b7a4426; from df21857714398acb8b24a8bb5a6d2286dd9c59ef before d796cfd06074b579d265b28401306cadd30db945; from df21857714398acb8b24a8bb5a6d2286dd9c59ef before 8ce96f1182644079249a24ac7e2ffc32e0301a46; from df21857714398acb8b24a8bb5a6d2286dd9c59ef before d6bd0bb7697ea8c0387b0d9d973453f479017b23; from df21857714398acb8b24a8bb5a6d2286dd9c59ef before f76a8b323e28e0951f979dbef20a7496383c47df; from df21857714398acb8b24a8bb5a6d2286dd9c59ef before 8e86817b8af4d552f3c6fe04ca52bb0c8c57411d; from df21857714398acb8b24a8bb5a6d2286dd9c59ef before f8373d7090b745728de66308deeecc67e8d319ce | CNA record |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | all versions | CISA ADP |
linux linux_kernel linux:linux_kernel | from 2.6.25 before 5.10.259; from 5.11 before 5.15.210; from 5.16 before 6.1.176; from 6.2 before 6.6.143; from 6.7 before 6.12.94; from 6.13 before 6.18.36; from 6.19 before 7.0.13; 7.1; and 6 more ranges | NVD |
References
- https://git.kernel.org/stable/c/446e0ecd845abc394b24ae2030a883572bec9d16patch
- https://git.kernel.org/stable/c/928dd94db23e8ba340f83d68f7f24d831b7a4426patch
- https://git.kernel.org/stable/c/d796cfd06074b579d265b28401306cadd30db945patch
- https://git.kernel.org/stable/c/8ce96f1182644079249a24ac7e2ffc32e0301a46patch
- https://git.kernel.org/stable/c/d6bd0bb7697ea8c0387b0d9d973453f479017b23patch
- https://git.kernel.org/stable/c/f76a8b323e28e0951f979dbef20a7496383c47dfpatch
- https://git.kernel.org/stable/c/8e86817b8af4d552f3c6fe04ca52bb0c8c57411dpatch
- https://git.kernel.org/stable/c/f8373d7090b745728de66308deeecc67e8d319cepatch
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.