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TI-2024-23704 Aliases CVE-2024-35839GHSA-gw6v-2949-7c2m

netfilter: bridge: replace physindev with physinif in nf_bridge_info

Priority LOW 33Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 14 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: netfilter: bridge: replace physindev with physinif in nf_bridge_info An skb can be added to a neigh->arp_queue while waiting for an arp reply. Where original skb's skb->dev can be different to neigh's neigh->dev. For instance in case of bridging dnated skb from one veth to another, the skb would be added to a neigh->arp_queue of the bridge. As skb->dev can be reset back to nf_bridge->physindev and used, and as there is no explicit mechanism that prevents this physindev from been freed under us (for instance neigh_flush_dev doesn't cleanup skbs from different device's neigh queue) we can crash on e.g. this stack: arp_process neigh_update skb = __skb_dequeue(&neigh->arp_queue) neigh_resolve_output(..., skb) ... br_nf_dev_xmit br_nf_pre_routing_finish_bridge_slow skb->dev = nf_bridge->physindev br_handle_frame_finish Let's use plain ifindex instead of net_device link. To peek into the original net_device we will use dev_get_by_index_rcu(). Thus either we get device and are safe to use it or we don't get it and drop skb.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00222 12th percentileScored 2026-11-07
Fix Partial Linux (Linux): 6.1.75, 6.6.14, 6.7.2 +1Red Hat: 5 advisoriesRed Hat: 14 fixed, 2 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
LinuxLinux4.2 and later6.1.75, 6.6.14, 6.7.2, 6.8Patch availableCNA
  • Linux VendorLinux Affected 4.2 and later Fixed in 6.1.75, 6.6.14, 6.7.2, 6.8 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*4.2 to before 6.1.75; 6.2 to before 6.6.14; 6.7 to before 6.7.2VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 4.2 to before 6.1.75; 6.2 to before 6.6.14; 6.7 to before 6.7.2 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 6.1.75, 6.6.14, 6.7.2, 6.8

Red Hat 5 advisories

  • RHSA-2024:8856 Released 2024-11-05 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.27.1.el8_10, kernel-4.18.0-553.27.1.el8_10, kernel-abi-stablelists-4.18.0-553.27.1.el8_10 +19
    • Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.27.1.el8_10
  • RHSA-2024:8870 Released 2024-11-05 · Red Hat rating Moderate
    kernel-rt security update
    • Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-553.27.1.rt7.368.el8_10, kernel-rt-core-4.18.0-553.27.1.rt7.368.el8_10, kernel-rt-debug-4.18.0-553.27.1.rt7.368.el8_10 +9
    • Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-553.27.1.rt7.368.el8_10, kernel-rt-core-4.18.0-553.27.1.rt7.368.el8_10, kernel-rt-debug-4.18.0-553.27.1.rt7.368.el8_10 +7
  • RHSA-2024:6267 Released 2024-09-04 · Red Hat rating Moderate
    kernel security update
    • Red Hat CodeReady Linux Builder EUS (v.9.2) kernel-tools-libs-devel-5.14.0-284.82.1.el9_2
    • Red Hat Enterprise Linux AppStream EUS (v.9.2) kernel-64k-debug-devel-5.14.0-284.82.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.82.1.el9_2, kernel-64k-devel-5.14.0-284.82.1.el9_2 +9
    • Red Hat Enterprise Linux BaseOS EUS (v.9.2) bpftool-7.0.0-284.82.1.el9_2, kernel-5.14.0-284.82.1.el9_2, kernel-64k-5.14.0-284.82.1.el9_2 +29
Show 2 more Red Hat advisories
  • RHSA-2024:6268 Released 2024-09-04 · Red Hat rating Moderate
    kernel-rt security update
    • Red Hat Enterprise Linux Real Time EUS (v.9.2) kernel-rt-5.14.0-284.82.1.rt14.367.el9_2, kernel-rt-core-5.14.0-284.82.1.rt14.367.el9_2, kernel-rt-debug-5.14.0-284.82.1.rt14.367.el9_2 +9
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2) kernel-rt-5.14.0-284.82.1.rt14.367.el9_2, kernel-rt-core-5.14.0-284.82.1.rt14.367.el9_2, kernel-rt-debug-5.14.0-284.82.1.rt14.367.el9_2 +11
  • RHSA-2024:5928 Released 2024-08-28 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-427.33.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.33.1.el9_4, kernel-64k-devel-5.14.0-427.33.1.el9_4 +11
    • Red Hat Enterprise Linux BaseOS (v. 9) bpftool-7.3.0-427.33.1.el9_4, kernel-5.14.0-427.33.1.el9_4, kernel-64k-5.14.0-427.33.1.el9_4 +29
    • Red Hat Enterprise Linux CRB (v. 9) kernel-tools-libs-devel-5.14.0-427.33.1.el9_4, libperf-5.14.0-427.33.1.el9_4
    • Red Hat Enterprise Linux NFV (v. 9) kernel-rt-5.14.0-427.33.1.el9_4, kernel-rt-core-5.14.0-427.33.1.el9_4, kernel-rt-debug-5.14.0-427.33.1.el9_4 +11
    • Red Hat Enterprise Linux RT (v. 9) kernel-rt-5.14.0-427.33.1.el9_4, kernel-rt-core-5.14.0-427.33.1.el9_4, kernel-rt-debug-5.14.0-427.33.1.el9_4 +9

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat CodeReady Linux Builder EUS (v.9.2)Fixed RHSA-2024:6267
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2024:5928
Red Hat Enterprise Linux AppStream EUS (v.9.2)Fixed RHSA-2024:6267
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2024:8856
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2024:5928
Red Hat Enterprise Linux BaseOS EUS (v.9.2)Fixed RHSA-2024:6267
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2024:8856
Red Hat Enterprise Linux CRB (v. 9)Fixed RHSA-2024:5928
Red Hat Enterprise Linux NFV (v. 8)Fixed RHSA-2024:8870
Red Hat Enterprise Linux NFV (v. 9)Fixed RHSA-2024:5928
Red Hat Enterprise Linux RT (v. 8)Fixed RHSA-2024:8870
Red Hat Enterprise Linux RT (v. 9)Fixed RHSA-2024:5928
Red Hat Enterprise Linux Real Time EUS (v.9.2)Fixed RHSA-2024:6268
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2)Fixed RHSA-2024:6268
Not affected: 2 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux AppStream EUS (v.9.2)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-35839
  2. 2026-10-03 Alias added: GHSA-gw6v-2949-7c2m

References

Patch 4

  • 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