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TI-2026-48094 Aliases CVE-2026-68315GHSA-xm4m-qj4q-fpc2

sctp: validate stream count in sctp_process_strreset_inreq()

Priority LOW 39CWE-190Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 16 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-190 and the CVSS impact.

Summary

In the Linux kernel, the following vulnerability has been resolved: sctp: validate stream count in sctp_process_strreset_inreq() When processing a RESET_IN_REQUEST from a peer, sctp_process_strreset_inreq() derives the stream count from the parameter length but does not check whether the resulting RESET_OUT_REQUEST would exceed SCTP_MAX_CHUNK_LEN. The OUT request header (sctp_strreset_outreq, 16 bytes) is 8 bytes larger than the IN request header (sctp_strreset_inreq, 8 bytes). Generally, the IP payload is bounded to 65535 bytes, so the stream list cannot be large enough to trigger the overflow. However, on interfaces with MTU > 65535 (e.g., loopback with IPv6 jumbograms), a stream list that fits within the incoming IN parameter can cause a __u16 overflow in sctp_make_strreset_req() when computing the OUT request size, leading to an undersized skb allocation and a kernel BUG: net/core/skbuff.c:207 skb_panic net/core/skbuff.c:2625 skb_put net/sctp/sm_make_chunk.c:1535 sctp_addto_chunk net/sctp/sm_make_chunk.c:3695 sctp_make_strreset_req net/sctp/stream.c:655 sctp_process_strreset_inreq The local setsockopt path validates the generated reset request size. However, for an incoming-only reset, it accounts for the smaller IN request even though the peer must generate an OUT request with the same stream list. Such a request cannot be completed successfully by the peer. Reject peer IN requests whose corresponding OUT request would exceed SCTP_MAX_CHUNK_LEN. Also tighten the local check so it does not send an IN request that would require an oversized OUT request from the peer.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00512 43rd percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.10.265, 5.15.216, 6.1.183 +5Red Hat: 4 advisoriesRed Hat: 16 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux4.11 and later5.10.265, 5.15.216, 6.1.183, 6.6.148, 6.12.101, 6.18.42, 7.1.6, 7.2Patch availableCNA
  • Linux VendorLinux Affected 4.11 and later Fixed in 5.10.265, 5.15.216, 6.1.183, 6.6.148, 6.12.101, 6.18.42, 7.1.6, 7.2 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*——Linux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions — — ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 5.10.265, 5.15.216, 6.1.183, 6.6.148, 6.12.101, 6.18.42, 7.1.6, 7.2

Red Hat 4 advisories

  • RHSA-2026:85321 Released 2026-10-19 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • 10Base-SMTV kernel-modules-internal-6.12.0-211.67.1.el10_2
    • Red Hat Enterprise Linux AppStream (v. 10) kernel-64k-debug-devel-6.12.0-211.67.1.el10_2, kernel-64k-debug-devel-matched-6.12.0-211.67.1.el10_2, kernel-64k-devel-6.12.0-211.67.1.el10_2 +12
    • Red Hat Enterprise Linux BaseOS (v. 10) kernel-6.12.0-211.67.1.el10_2, kernel-64k-6.12.0-211.67.1.el10_2, kernel-64k-core-6.12.0-211.67.1.el10_2 +29
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) kernel-tools-libs-devel-6.12.0-211.67.1.el10_2, libperf-6.12.0-211.67.1.el10_2
    • Red Hat Enterprise Linux Hidden (v. 10) kernel-modules-internal-6.12.0-211.67.1.el10_2
    • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt-6.12.0-211.67.1.el10_2, kernel-rt-64k-6.12.0-211.67.1.el10_2, kernel-rt-64k-core-6.12.0-211.67.1.el10_2 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt-6.12.0-211.67.1.el10_2, kernel-rt-core-6.12.0-211.67.1.el10_2, kernel-rt-debug-6.12.0-211.67.1.el10_2 +9
  • RHSA-2026:67150 Released 2026-09-14 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-687.47.1.el9_8, kernel-64k-debug-devel-matched-5.14.0-687.47.1.el9_8, kernel-64k-devel-5.14.0-687.47.1.el9_8 +12
    • Red Hat Enterprise Linux BaseOS (v. 9) kernel-5.14.0-687.47.1.el9_8, kernel-64k-5.14.0-687.47.1.el9_8, kernel-64k-core-5.14.0-687.47.1.el9_8 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-687.47.1.el9_8, libperf-5.14.0-687.47.1.el9_8
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-687.47.1.el9_8, kernel-rt-64k-5.14.0-687.47.1.el9_8, kernel-rt-64k-core-5.14.0-687.47.1.el9_8 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-687.47.1.el9_8, kernel-rt-core-5.14.0-687.47.1.el9_8, kernel-rt-debug-5.14.0-687.47.1.el9_8 +9
  • RHSA-2026:66325 Released 2026-09-10 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.162.1.el8_10, kernel-4.18.0-553.162.1.el8_10, kernel-abi-stablelists-4.18.0-553.162.1.el8_10 +19
    • Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.162.1.el8_10
Show 1 more Red Hat advisories
  • RHSA-2026:66324 Released 2026-09-10 · Red Hat rating Important
    kernel-rt security, bug fix, and enhancement update
    • Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-553.162.1.rt7.503.el8_10, kernel-rt-core-4.18.0-553.162.1.rt7.503.el8_10, kernel-rt-debug-4.18.0-553.162.1.rt7.503.el8_10 +9
    • Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-553.162.1.rt7.503.el8_10, kernel-rt-core-4.18.0-553.162.1.rt7.503.el8_10, kernel-rt-debug-4.18.0-553.162.1.rt7.503.el8_10 +7

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 9AffectedNo fix yet
10Base-SMTVFixed RHSA-2026:85321
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:85321
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:67150
Red Hat Enterprise Linux BaseOS (v. 10)Fixed RHSA-2026:85321
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2026:66325
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2026:67150
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2026:66325
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2026:85321
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2026:67150
Red Hat Enterprise Linux Hidden (v. 10)Fixed RHSA-2026:85321
Red Hat Enterprise Linux NFV (v. 8)Fixed RHSA-2026:66324
Red Hat Enterprise Linux RT (v. 8)Fixed RHSA-2026:66324
Red Hat Enterprise Linux Real Time (v. 10)Fixed RHSA-2026:85321
Red Hat Enterprise Linux Real Time (v. 9)Fixed RHSA-2026:67150
Red Hat Enterprise Linux Real Time for NFV (v. 10)Fixed RHSA-2026:85321
Red Hat Enterprise Linux Real Time for NFV (v. 9)Fixed RHSA-2026:67150
Not affected: 2 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-68315
  2. 2026-10-03 Alias added: GHSA-xm4m-qj4q-fpc2
  3. 2026-10-16 CISA SSVC decision points changed
  4. 2026-10-20 Weakness changed · CISA ADP
  5. 2026-10-20 Fix available: RHSA-2026:85321 · Red Hat
  6. 2026-10-20 Fix available: 10Base-SMTV, Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10) +4 · Red Hat
  7. 2026-11-06 CVSS score changed · Red Hat

References

Other 8

  • TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
  • TI-2021-02452 Incorrect authorization in Ubuntu linux kernel KEVCVSS 3.1HIGH 8.8
  • TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
  • TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
  • TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
See all 21741 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences