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TI-2022-26319 Aliases CVE-2022-50865GHSA-2qmc-x97c-8pmc

tcp: fix a signed-integer-overflow bug in tcp_add_backlog()

Priority LOW 33Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 20 fixed, 1 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: tcp: fix a signed-integer-overflow bug in tcp_add_backlog() The type of sk_rcvbuf and sk_sndbuf in struct sock is int, and in tcp_add_backlog(), the variable limit is caculated by adding sk_rcvbuf, sk_sndbuf and 64 * 1024, it may exceed the max value of int and overflow. This patch reduces the limit budget by halving the sndbuf to solve this issue since ACK packets are much smaller than the payload.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00528 44th percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.4.278, 5.10.153, 5.15.77 +2Red Hat: 11 advisoriesRed Hat: 20 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
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
LinuxLinux4.9 and later5.4.278, 5.10.153, 5.15.77, 6.0.7, 6.1Patch availableCNA
  • Linux VendorLinux Affected 4.9 and later Fixed in 5.4.278, 5.10.153, 5.15.77, 6.0.7, 6.1 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 5.4.278, 5.10.153, 5.15.77, 6.0.7, 6.1

Red Hat 11 advisories

  • RHSA-2026:3388 Released 2026-02-26 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v. 8.2) bpftool-4.18.0-193.187.1.el8_2, kernel-4.18.0-193.187.1.el8_2, kernel-abi-whitelists-4.18.0-193.187.1.el8_2 +14
  • RHSA-2026:3360 Released 2026-02-25 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.4) bpftool-4.18.0-305.186.1.el8_4, kernel-4.18.0-305.186.1.el8_4, kernel-abi-stablelists-4.18.0-305.186.1.el8_4 +14
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) bpftool-4.18.0-305.186.1.el8_4, kernel-4.18.0-305.186.1.el8_4, kernel-abi-stablelists-4.18.0-305.186.1.el8_4 +14
  • RHSA-2026:3277 Released 2026-02-25 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS E4S (v.8.8) bpftool-4.18.0-477.130.1.el8_8, kernel-4.18.0-477.130.1.el8_8, kernel-abi-stablelists-4.18.0-477.130.1.el8_8 +14
    • Red Hat Enterprise Linux BaseOS TUS (v.8.8) bpftool-4.18.0-477.130.1.el8_8, kernel-4.18.0-477.130.1.el8_8, kernel-abi-stablelists-4.18.0-477.130.1.el8_8 +14
Show 8 more Red Hat advisories
  • RHSA-2026:2577 Released 2026-02-11 · Red Hat rating Moderate
    kernel-rt security update
    • Red Hat Enterprise Linux NFV E4S (v.9.0) kernel-rt-5.14.0-70.165.1.rt21.237.el9_0, kernel-rt-core-5.14.0-70.165.1.rt21.237.el9_0, kernel-rt-debug-5.14.0-70.165.1.rt21.237.el9_0 +9
    • Red Hat Enterprise Linux Real Time E4S (v.9.0) kernel-rt-5.14.0-70.165.1.rt21.237.el9_0, kernel-rt-core-5.14.0-70.165.1.rt21.237.el9_0, kernel-rt-debug-5.14.0-70.165.1.rt21.237.el9_0 +7
  • RHSA-2026:2573 Released 2026-02-11 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.0) kernel-debug-devel-5.14.0-70.165.1.el9_0, kernel-debug-devel-matched-5.14.0-70.165.1.el9_0, kernel-devel-5.14.0-70.165.1.el9_0 +5
    • Red Hat Enterprise Linux BaseOS E4S (v.9.0) bpftool-5.14.0-70.165.1.el9_0, kernel-5.14.0-70.165.1.el9_0, kernel-abi-stablelists-5.14.0-70.165.1.el9_0 +14
  • RHSA-2026:2490 Released 2026-02-11 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.6) bpftool-4.18.0-372.179.1.el8_6, kernel-4.18.0-372.179.1.el8_6, kernel-abi-stablelists-4.18.0-372.179.1.el8_6 +14
    • Red Hat Enterprise Linux BaseOS E4S (v.8.6) bpftool-4.18.0-372.179.1.el8_6, kernel-4.18.0-372.179.1.el8_6, kernel-abi-stablelists-4.18.0-372.179.1.el8_6 +19
    • Red Hat Enterprise Linux BaseOS TUS (v.8.6) bpftool-4.18.0-372.179.1.el8_6, kernel-4.18.0-372.179.1.el8_6, kernel-abi-stablelists-4.18.0-372.179.1.el8_6 +14
  • RHSA-2026:1946 Released 2026-02-04 · Red Hat rating Important
    kernel-rt security update
    • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt-5.14.0-284.155.1.rt14.440.el9_2, kernel-rt-core-5.14.0-284.155.1.rt14.440.el9_2, kernel-rt-debug-5.14.0-284.155.1.rt14.440.el9_2 +9
    • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt-5.14.0-284.155.1.rt14.440.el9_2, kernel-rt-core-5.14.0-284.155.1.rt14.440.el9_2, kernel-rt-debug-5.14.0-284.155.1.rt14.440.el9_2 +11
  • RHSA-2026:1909 Released 2026-02-04 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) kernel-64k-debug-devel-5.14.0-284.155.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.155.1.el9_2, kernel-64k-devel-5.14.0-284.155.1.el9_2 +10
    • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool-7.0.0-284.155.1.el9_2, kernel-5.14.0-284.155.1.el9_2, kernel-64k-5.14.0-284.155.1.el9_2 +29
  • RHSA-2026:1662 Released 2026-02-02 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.100.1.el8_10, kernel-4.18.0-553.100.1.el8_10, kernel-abi-stablelists-4.18.0-553.100.1.el8_10 +19
    • Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.100.1.el8_10
  • RHSA-2026:1661 Released 2026-02-02 · Red Hat rating Moderate
    kernel-rt security update
    • Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-553.100.1.rt7.441.el8_10, kernel-rt-core-4.18.0-553.100.1.rt7.441.el8_10, kernel-rt-debug-4.18.0-553.100.1.rt7.441.el8_10 +9
    • Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-553.100.1.rt7.441.el8_10, kernel-rt-core-4.18.0-553.100.1.rt7.441.el8_10, kernel-rt-debug-4.18.0-553.100.1.rt7.441.el8_10 +7
  • 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: Low. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat Enterprise Linux AppStream E4S (v.9.0)Fixed RHSA-2026:2573
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2026:1909
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2026:1662
Red Hat Enterprise Linux BaseOS AUS (v. 8.2)Fixed RHSA-2026:3388
Red Hat Enterprise Linux BaseOS AUS (v.8.4)Fixed RHSA-2026:3360
Red Hat Enterprise Linux BaseOS AUS (v.8.6)Fixed RHSA-2026:2490
Red Hat Enterprise Linux BaseOS E4S (v.8.6)Fixed RHSA-2026:2490
Red Hat Enterprise Linux BaseOS E4S (v.8.8)Fixed RHSA-2026:3277
Red Hat Enterprise Linux BaseOS E4S (v.9.0)Fixed RHSA-2026:2573
Red Hat Enterprise Linux BaseOS E4S (v.9.2)Fixed RHSA-2026:1909
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)Fixed RHSA-2026:3360
Red Hat Enterprise Linux BaseOS TUS (v.8.6)Fixed RHSA-2026:2490
Red Hat Enterprise Linux BaseOS TUS (v.8.8)Fixed RHSA-2026:3277
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2026:1662
Red Hat Enterprise Linux NFV (v. 8)Fixed RHSA-2026:1661
Red Hat Enterprise Linux NFV E4S (v.9.0)Fixed RHSA-2026:2577
Red Hat Enterprise Linux RT (v. 8)Fixed RHSA-2026:1661
Red Hat Enterprise Linux Real Time E4S (v.9.0)Fixed RHSA-2026:2577
Red Hat Enterprise Linux Real Time E4S (v.9.2)Fixed RHSA-2026:1946
Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)Fixed RHSA-2026:1946
Not affected: 6 products
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 9
  • Red Hat Enterprise Linux NFV (v. 8)
  • Red Hat Enterprise Linux RT (v. 8)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-50865
  2. 2026-10-03 Alias added: GHSA-2qmc-x97c-8pmc

References

Other 5

  • 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