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TI-2023-29992 Aliases CVE-2023-53705GHSA-27mw-8p8v-6j5h

ipv6: Fix out-of-bounds access in ipv6_find_tlv()

Priority MEDIUM 42Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Low · None · High
Fix status
Partial Red Hat: 21 fixed, 2 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.

Summary

In the Linux kernel, the following vulnerability has been resolved: ipv6: Fix out-of-bounds access in ipv6_find_tlv() optlen is fetched without checking whether there is more than one byte to parse. It can lead to out-of-bounds access. Found by InfoTeCS on behalf of Linux Verification Center (linuxtesting.org) with SVACE.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00564 47th percentileScored 2026-11-07
Fix Partial Linux (Linux): 4.14.316, 4.19.284, 5.4.244 +5Red Hat: 12 advisoriesRed Hat: 21 fixed, 2 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
LinuxLinux2.6.19 and later4.14.316, 4.19.284, 5.4.244, 5.10.181, 5.15.114, 6.1.31, 6.3.5, 6.4Patch availableCNA
  • Linux VendorLinux Affected 2.6.19 and later Fixed in 4.14.316, 4.19.284, 5.4.244, 5.10.181, 5.15.114, 6.1.31, 6.3.5, 6.4 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 4.14.316, 4.19.284, 5.4.244, 5.10.181, 5.15.114, 6.1.31, 6.3.5, 6.4

Red Hat 12 advisories

  • RHSA-2026:1512 Released 2026-01-28 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v. 8.2) bpftool-4.18.0-193.183.1.el8_2, kernel-4.18.0-193.183.1.el8_2, kernel-abi-whitelists-4.18.0-193.183.1.el8_2 +14
  • RHSA-2026:1442 Released 2026-01-28 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.6) bpftool-4.18.0-372.177.1.el8_6, kernel-4.18.0-372.177.1.el8_6, kernel-abi-stablelists-4.18.0-372.177.1.el8_6 +14
    • Red Hat Enterprise Linux BaseOS E4S (v.8.6) bpftool-4.18.0-372.177.1.el8_6, kernel-4.18.0-372.177.1.el8_6, kernel-abi-stablelists-4.18.0-372.177.1.el8_6 +19
    • Red Hat Enterprise Linux BaseOS TUS (v.8.6) bpftool-4.18.0-372.177.1.el8_6, kernel-4.18.0-372.177.1.el8_6, kernel-abi-stablelists-4.18.0-372.177.1.el8_6 +14
  • RHSA-2026:1441 Released 2026-01-28 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) kernel-64k-debug-devel-5.14.0-284.154.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.154.1.el9_2, kernel-64k-devel-5.14.0-284.154.1.el9_2 +10
    • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool-7.0.0-284.154.1.el9_2, kernel-5.14.0-284.154.1.el9_2, kernel-64k-5.14.0-284.154.1.el9_2 +29
Show 9 more Red Hat advisories
  • RHSA-2026:1443 Released 2026-01-28 · Red Hat rating Moderate
    kernel-rt security update
    • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt-5.14.0-284.154.1.rt14.439.el9_2, kernel-rt-core-5.14.0-284.154.1.rt14.439.el9_2, kernel-rt-debug-5.14.0-284.154.1.rt14.439.el9_2 +9
    • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt-5.14.0-284.154.1.rt14.439.el9_2, kernel-rt-core-5.14.0-284.154.1.rt14.439.el9_2, kernel-rt-debug-5.14.0-284.154.1.rt14.439.el9_2 +11
  • RHSA-2026:0755 Released 2026-01-19 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux Server (v. 7 ELS) bpftool-3.10.0-1160.145.1.el7, kernel-3.10.0-1160.145.1.el7, kernel-abi-whitelists-3.10.0-1160.145.1.el7 +11
    • Red Hat Enterprise Linux Server Optional (v. 7 ELS) kernel-debug-devel-3.10.0-1160.145.1.el7, kernel-tools-libs-devel-3.10.0-1160.145.1.el7
  • RHSA-2026:0754 Released 2026-01-19 · Red Hat rating Important
    kernel-rt security update
    • Red Hat Enterprise Linux for Real Time (v. 7 ELS) kernel-rt-3.10.0-1160.145.1.rt56.1297.el7, kernel-rt-debug-3.10.0-1160.145.1.rt56.1297.el7, kernel-rt-debug-devel-3.10.0-1160.145.1.rt56.1297.el7 +4
  • RHSA-2026:0576 Released 2026-01-14 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.0) kernel-debug-devel-5.14.0-70.161.1.el9_0, kernel-debug-devel-matched-5.14.0-70.161.1.el9_0, kernel-devel-5.14.0-70.161.1.el9_0 +5
    • Red Hat Enterprise Linux BaseOS E4S (v.9.0) bpftool-5.14.0-70.161.1.el9_0, kernel-5.14.0-70.161.1.el9_0, kernel-abi-stablelists-5.14.0-70.161.1.el9_0 +14
  • RHSA-2026:0532 Released 2026-01-14 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS E4S (v.8.8) bpftool-4.18.0-477.124.1.el8_8, kernel-4.18.0-477.124.1.el8_8, kernel-abi-stablelists-4.18.0-477.124.1.el8_8 +14
    • Red Hat Enterprise Linux BaseOS TUS (v.8.8) bpftool-4.18.0-477.124.1.el8_8, kernel-4.18.0-477.124.1.el8_8, kernel-abi-stablelists-4.18.0-477.124.1.el8_8 +14
  • RHSA-2026:0533 Released 2026-01-14 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.4) bpftool-4.18.0-305.183.1.el8_4, kernel-4.18.0-305.183.1.el8_4, kernel-abi-stablelists-4.18.0-305.183.1.el8_4 +14
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) bpftool-4.18.0-305.183.1.el8_4, kernel-4.18.0-305.183.1.el8_4, kernel-abi-stablelists-4.18.0-305.183.1.el8_4 +14
  • RHSA-2026:0537 Released 2026-01-14 · Red Hat rating Important
    kernel-rt security update
    • Red Hat Enterprise Linux NFV E4S (v.9.0) kernel-rt-5.14.0-70.161.1.rt21.233.el9_0, kernel-rt-core-5.14.0-70.161.1.rt21.233.el9_0, kernel-rt-debug-5.14.0-70.161.1.rt21.233.el9_0 +9
    • Red Hat Enterprise Linux Real Time E4S (v.9.0) kernel-rt-5.14.0-70.161.1.rt21.233.el9_0, kernel-rt-core-5.14.0-70.161.1.rt21.233.el9_0, kernel-rt-debug-5.14.0-70.161.1.rt21.233.el9_0 +7
  • RHSA-2024:3138 Released 2024-05-22 · Red Hat rating Moderate
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.el8_10, kernel-4.18.0-553.el8_10, kernel-abi-stablelists-4.18.0-553.el8_10 +19
    • Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.el8_10
  • RHSA-2023:6583 Released 2023-11-07 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-362.8.1.el9_3, libperf-5.14.0-362.8.1.el9_3
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-362.8.1.el9_3, kernel-64k-debug-devel-matched-5.14.0-362.8.1.el9_3, kernel-64k-devel-5.14.0-362.8.1.el9_3 +11
    • Red Hat Enterprise Linux BaseOS (v. 9) bpftool-7.2.0-362.8.1.el9_3, kernel-5.14.0-362.8.1.el9_3, kernel-64k-5.14.0-362.8.1.el9_3 +29
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-362.8.1.el9_3, kernel-rt-core-5.14.0-362.8.1.el9_3, kernel-rt-debug-5.14.0-362.8.1.el9_3 +9
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-362.8.1.el9_3, kernel-rt-core-5.14.0-362.8.1.el9_3, kernel-rt-debug-5.14.0-362.8.1.el9_3 +11

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 8AffectedNo fix yet
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat Enterprise Linux AppStream E4S (v.9.0)Fixed RHSA-2026:0576
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2026:1441
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2024:3138
Red Hat Enterprise Linux BaseOS AUS (v. 8.2)Fixed RHSA-2026:1512
Red Hat Enterprise Linux BaseOS AUS (v.8.4)Fixed RHSA-2026:0533
Red Hat Enterprise Linux BaseOS AUS (v.8.6)Fixed RHSA-2026:1442
Red Hat Enterprise Linux BaseOS E4S (v.8.6)Fixed RHSA-2026:1442
Red Hat Enterprise Linux BaseOS E4S (v.8.8)Fixed RHSA-2026:0532
Red Hat Enterprise Linux BaseOS E4S (v.9.0)Fixed RHSA-2026:0576
Red Hat Enterprise Linux BaseOS E4S (v.9.2)Fixed RHSA-2026:1441
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)Fixed RHSA-2026:0533
Red Hat Enterprise Linux BaseOS TUS (v.8.6)Fixed RHSA-2026:1442
Red Hat Enterprise Linux BaseOS TUS (v.8.8)Fixed RHSA-2026:0532
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2024:3138
Red Hat Enterprise Linux NFV E4S (v.9.0)Fixed RHSA-2026:0537
Red Hat Enterprise Linux Real Time E4S (v.9.0)Fixed RHSA-2026:0537
Red Hat Enterprise Linux Real Time E4S (v.9.2)Fixed RHSA-2026:1443
Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)Fixed RHSA-2026:1443
Red Hat Enterprise Linux Server (v. 7 ELS)Fixed RHSA-2026:0755
Red Hat Enterprise Linux Server Optional (v. 7 ELS)Fixed RHSA-2026:0755
Red Hat Enterprise Linux for Real Time (v. 7 ELS)Fixed RHSA-2026:0754
Not affected: 2 products
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 6

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-53705
  2. 2026-10-03 Alias added: GHSA-27mw-8p8v-6j5h
  3. 2026-10-16 CISA SSVC decision points changed
  4. 2026-10-16 Priority changed: LOW → MEDIUM

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 21727 →

Sources

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