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TI-2026-38089 Aliases CVE-2026-53002GHSA-2256-5c36-mwcj

netfilter: conntrack: remove sprintf usage

Priority MEDIUM 49CWE-787Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 36 fixed, 2 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-787 and the CVSS impact.

Summary

In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack: remove sprintf usage Replace it with scnprintf, the buffer sizes are expected to be large enough to hold the result, no need for snprintf+overflow check. Increase buffer size in mangle_content_len() while at it. BUG: KASAN: stack-out-of-bounds in vsnprintf+0xea5/0x1270 Write of size 1 at addr [..] vsnprintf+0xea5/0x1270 sprintf+0xb1/0xe0 mangle_content_len+0x1ac/0x280 nf_nat_sdp_session+0x1cc/0x240 process_sdp+0x8f8/0xb80 process_invite_request+0x108/0x2b0 process_sip_msg+0x5da/0xf50 sip_help_tcp+0x45e/0x780 nf_confirm+0x34d/0x990 [..]

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00368 30th percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.10.258, 5.15.209, 6.1.175 +5Red Hat: 13 advisoriesRed Hat: 36 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux2.6.20 and later5.10.258, 5.15.209, 6.1.175, 6.6.141, 6.12.91, 6.18.33, 7.0.10, 7.1Patch availableCNA
  • Linux VendorLinux Affected 2.6.20 and later Fixed in 5.10.258, 5.15.209, 6.1.175, 6.6.141, 6.12.91, 6.18.33, 7.0.10, 7.1 Patch available CNA

CPE configurations NVD · 5

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*2.6.20 to before 5.10.258; 5.11 to before 5.15.209; 5.16 to before 6.1.175; 6.2 to before 6.6.141; 6.7 to before 6.12.91; 6.13 to before 6.18.33; 6.19 to before 7.0.10VulnerableLinux
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*8.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*9.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*10.0VulnerableRed Hat
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 2.6.20 to before 5.10.258; 5.11 to before 5.15.209; 5.16 to before 6.1.175; 6.2 to before 6.6.141; 6.7 to before 6.12.91; 6.13 to before 6.18.33; 6.19 to before 7.0.10 Vulnerable ·Linux
  • cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Red Hat

Remediation

  • Fix · CNA Linux (Linux) Fixed in 5.10.258, 5.15.209, 6.1.175, 6.6.141, 6.12.91, 6.18.33, 7.0.10, 7.1

Red Hat 13 advisories

  • RHSA-2026:81349 Released 2026-10-12 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Server (v. 7 ELS) bpftool-3.10.0-1160.167.1.el7, kernel-3.10.0-1160.167.1.el7, kernel-abi-whitelists-3.10.0-1160.167.1.el7 +11
    • Red Hat Enterprise Linux Server Optional (v. 7 ELS) kernel-debug-devel-3.10.0-1160.167.1.el7, kernel-tools-libs-devel-3.10.0-1160.167.1.el7
  • RHSA-2026:81371 Released 2026-10-12 · Red Hat rating Important
    kernel-rt security, bug fix, and enhancement update
    • Red Hat Enterprise Linux for Real Time (v. 7 ELS) kernel-rt-3.10.0-1160.167.1.rt56.1319.el7, kernel-rt-debug-3.10.0-1160.167.1.rt56.1319.el7, kernel-rt-debug-devel-3.10.0-1160.167.1.rt56.1319.el7 +4
  • RHSA-2026:77215 Released 2026-10-07 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) kernel-64k-debug-devel-5.14.0-284.195.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.195.1.el9_2, kernel-64k-devel-5.14.0-284.195.1.el9_2 +10
    • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool-7.0.0-284.195.1.el9_2, kernel-5.14.0-284.195.1.el9_2, kernel-64k-5.14.0-284.195.1.el9_2 +29
Show 10 more Red Hat advisories
  • RHSA-2026:77214 Released 2026-10-07 · Red Hat rating Important
    kernel-rt security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt-5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-core-5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-debug-5.14.0-284.195.1.rt14.480.el9_2 +9
    • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt-5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-core-5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-debug-5.14.0-284.195.1.rt14.480.el9_2 +11
  • RHSA-2026:74174 Released 2026-10-01 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder EUS (v.9.6) kernel-tools-libs-devel-5.14.0-570.146.1.el9_6, libperf-5.14.0-570.146.1.el9_6
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) kernel-64k-debug-devel-5.14.0-570.146.1.el9_6, kernel-64k-debug-devel-matched-5.14.0-570.146.1.el9_6, kernel-64k-devel-5.14.0-570.146.1.el9_6 +12
    • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel-5.14.0-570.146.1.el9_6, kernel-64k-5.14.0-570.146.1.el9_6, kernel-64k-core-5.14.0-570.146.1.el9_6 +28
    • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt-5.14.0-570.146.1.el9_6, kernel-rt-64k-5.14.0-570.146.1.el9_6, kernel-rt-64k-core-5.14.0-570.146.1.el9_6 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt-5.14.0-570.146.1.el9_6, kernel-rt-core-5.14.0-570.146.1.el9_6, kernel-rt-debug-5.14.0-570.146.1.el9_6 +11
  • RHSA-2026:73645 Released 2026-09-30 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream E4S (v.9.4) kernel-64k-debug-devel-5.14.0-427.153.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.153.1.el9_4, kernel-64k-devel-5.14.0-427.153.1.el9_4 +11
    • Red Hat Enterprise Linux BaseOS E4S (v.9.4) bpftool-7.3.0-427.153.1.el9_4, kernel-5.14.0-427.153.1.el9_4, kernel-64k-5.14.0-427.153.1.el9_4 +29
    • Red Hat Enterprise Linux Real Time E4S (v.9.4) kernel-rt-5.14.0-427.153.1.el9_4, kernel-rt-core-5.14.0-427.153.1.el9_4, kernel-rt-debug-5.14.0-427.153.1.el9_4 +9
    • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4) kernel-rt-5.14.0-427.153.1.el9_4, kernel-rt-core-5.14.0-427.153.1.el9_4, kernel-rt-debug-5.14.0-427.153.1.el9_4 +11
  • RHSA-2026:69906 Released 2026-09-22 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.6) bpftool-4.18.0-372.216.1.el8_6, kernel-4.18.0-372.216.1.el8_6, kernel-abi-stablelists-4.18.0-372.216.1.el8_6 +14
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) bpftool-4.18.0-372.216.1.el8_6, kernel-4.18.0-372.216.1.el8_6, kernel-abi-stablelists-4.18.0-372.216.1.el8_6 +19
  • RHSA-2026:69874 Released 2026-09-22 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.4) bpftool-4.18.0-305.208.1.el8_4, kernel-4.18.0-305.208.1.el8_4, kernel-abi-stablelists-4.18.0-305.208.1.el8_4 +14
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) bpftool-4.18.0-305.208.1.el8_4, kernel-4.18.0-305.208.1.el8_4, kernel-abi-stablelists-4.18.0-305.208.1.el8_4 +19
  • RHSA-2026:69837 Released 2026-09-22 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS E4S (v.8.8) bpftool-4.18.0-477.168.1.el8_8, kernel-4.18.0-477.168.1.el8_8, kernel-abi-stablelists-4.18.0-477.168.1.el8_8 +14
    • Red Hat Enterprise Linux BaseOS TUS (v.8.8) bpftool-4.18.0-477.168.1.el8_8, kernel-4.18.0-477.168.1.el8_8, kernel-abi-stablelists-4.18.0-477.168.1.el8_8 +14
  • RHSA-2026:69089 Released 2026-09-21 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) kernel-64k-debug-devel-6.12.0-55.105.1.el10_0, kernel-64k-debug-devel-matched-6.12.0-55.105.1.el10_0, kernel-64k-devel-6.12.0-55.105.1.el10_0 +12
    • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel-6.12.0-55.105.1.el10_0, kernel-64k-6.12.0-55.105.1.el10_0, kernel-64k-core-6.12.0-55.105.1.el10_0 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) kernel-tools-libs-devel-6.12.0-55.105.1.el10_0, libperf-6.12.0-55.105.1.el10_0
    • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt-6.12.0-55.105.1.el10_0, kernel-rt-64k-6.12.0-55.105.1.el10_0, kernel-rt-64k-core-6.12.0-55.105.1.el10_0 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt-6.12.0-55.105.1.el10_0, kernel-rt-core-6.12.0-55.105.1.el10_0, kernel-rt-debug-6.12.0-55.105.1.el10_0 +11
  • RHSA-2026:66180 Released 2026-09-10 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-687.46.1.el9_8, kernel-64k-debug-devel-matched-5.14.0-687.46.1.el9_8, kernel-64k-devel-5.14.0-687.46.1.el9_8 +12
    • Red Hat Enterprise Linux BaseOS (v. 9) kernel-5.14.0-687.46.1.el9_8, kernel-64k-5.14.0-687.46.1.el9_8, kernel-64k-core-5.14.0-687.46.1.el9_8 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-687.46.1.el9_8, libperf-5.14.0-687.46.1.el9_8
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-687.46.1.el9_8, kernel-rt-64k-5.14.0-687.46.1.el9_8, kernel-rt-64k-core-5.14.0-687.46.1.el9_8 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-687.46.1.el9_8, kernel-rt-core-5.14.0-687.46.1.el9_8, kernel-rt-debug-5.14.0-687.46.1.el9_8 +9
  • RHSA-2026:66000 Released 2026-09-09 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.160.1.el8_10, kernel-4.18.0-553.160.1.el8_10, kernel-abi-stablelists-4.18.0-553.160.1.el8_10 +19
    • Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.160.1.el8_10
  • RHSA-2026:64770 Released 2026-09-08 · Red Hat rating Important
    kernel-rt security update
    • Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-553.160.1.rt7.501.el8_10, kernel-rt-core-4.18.0-553.160.1.rt7.501.el8_10, kernel-rt-debug-4.18.0-553.160.1.rt7.501.el8_10 +9
    • Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-553.160.1.rt7.501.el8_10, kernel-rt-core-4.18.0-553.160.1.rt7.501.el8_10, kernel-rt-debug-4.18.0-553.160.1.rt7.501.el8_10 +7

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix yet
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat CodeReady Linux Builder EUS (v.9.6)Fixed RHSA-2026:74174
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:66180
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2026:77215
Red Hat Enterprise Linux AppStream E4S (v.9.4)Fixed RHSA-2026:73645
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:69089
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:74174
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2026:66000
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2026:66180
Red Hat Enterprise Linux BaseOS AUS (v.8.4)Fixed RHSA-2026:69874
Red Hat Enterprise Linux BaseOS AUS (v.8.6)Fixed RHSA-2026:69906
Red Hat Enterprise Linux BaseOS E4S (v.8.8)Fixed RHSA-2026:69837
Red Hat Enterprise Linux BaseOS E4S (v.9.2)Fixed RHSA-2026:77215
Red Hat Enterprise Linux BaseOS E4S (v.9.4)Fixed RHSA-2026:73645
Red Hat Enterprise Linux BaseOS EUS (v. 10.0)Fixed RHSA-2026:69089
Red Hat Enterprise Linux BaseOS EUS (v.9.6)Fixed RHSA-2026:74174
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)Fixed RHSA-2026:69874
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6)Fixed RHSA-2026:69906
Red Hat Enterprise Linux BaseOS TUS (v.8.8)Fixed RHSA-2026:69837
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2026:66000
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2026:66180
Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)Fixed RHSA-2026:69089
Red Hat Enterprise Linux NFV (v. 8)Fixed RHSA-2026:64770
Red Hat Enterprise Linux RT (v. 8)Fixed RHSA-2026:64770
Red Hat Enterprise Linux Real Time (v. 9)Fixed RHSA-2026:66180
Red Hat Enterprise Linux Real Time E4S (v.9.2)Fixed RHSA-2026:77214
Red Hat Enterprise Linux Real Time E4S (v.9.4)Fixed RHSA-2026:73645
Red Hat Enterprise Linux Real Time EUS (v. 10.0)Fixed RHSA-2026:69089
Red Hat Enterprise Linux Real Time EUS (v.9.6)Fixed RHSA-2026:74174
Red Hat Enterprise Linux Real Time for NFV (v. 9)Fixed RHSA-2026:66180
Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)Fixed RHSA-2026:77214
Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4)Fixed RHSA-2026:73645
Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0)Fixed RHSA-2026:69089
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6)Fixed RHSA-2026:74174
Red Hat Enterprise Linux Server (v. 7 ELS)Fixed RHSA-2026:81349
Red Hat Enterprise Linux Server Optional (v. 7 ELS)Fixed RHSA-2026:81349
Red Hat Enterprise Linux for Real Time (v. 7 ELS)Fixed RHSA-2026:81371
Not affected: 1 product
  • Red Hat Enterprise Linux 6

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-53002
  2. 2026-10-03 Alias added: GHSA-2256-5c36-mwcj
  3. 2026-10-07 Fix available: RHSA-2026:77214 · Red Hat
  4. 2026-10-07 Fix available: RHSA-2026:77215 · Red Hat
  5. 2026-10-07 Fix available: Red Hat Enterprise Linux AppStream E4S (v.9.2), Red Hat Enterprise Linux BaseOS E4S (v.9.2), Red Hat Enterprise Linux Real Time E4S (v.9.2) +1 · Red Hat
  6. 2026-10-12 Fix available: RHSA-2026:81371 · Red Hat
  7. 2026-10-13 Fix available: RHSA-2026:81349 · Red Hat
  8. 2026-10-13 Fix available: Red Hat Enterprise Linux Server (v. 7 ELS), Red Hat Enterprise Linux Server Optional (v. 7 ELS), Red Hat Enterprise Linux for Real Time (v. 7 ELS) · Red Hat
  9. 2026-10-16 CISA SSVC decision points changed
  10. 2026-10-19 Weakness changed · CISA ADP

References

Patch 8

Advisory 3

  • 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-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
  • TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
See all 15278 →

Sources

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