netfilter: nf_tables: mark set as dead when unbinding anonymous set with timeout
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- 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. Impact type from CWE-667 and the CVSS impact.
Summary
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: mark set as dead when unbinding anonymous set with timeout While the rhashtable set gc runs asynchronously, a race allows it to collect elements from anonymous sets with timeouts while it is being released from the commit path. Mingi Cho originally reported this issue in a different path in 6.1.x with a pipapo set with low timeouts which is not possible upstream since 7395dfacfff6 ("netfilter: nf_tables: use timestamp to check for set element timeout"). Fix this by setting on the dead flag for anonymous sets to skip async gc in this case. According to 08e4c8c5919f ("netfilter: nf_tables: mark newset as dead on transaction abort"), Florian plans to accelerate abort path by releasing objects via workqueue, therefore, this sets on the dead flag for abort path too.
Why it matters now
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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 5.4.262 to before 5.4.274; 5.10.198 to before 5.10.215; 5.15.134 to before 5.15.154; 6.1.56 to before 6.1.84; 6.4.11 to before 6.5 | 5.4.274, 5.10.215, 5.15.154, 6.1.84, 6.5 | Patch available | CNA |
| Linux | Linux | 6.5 and later | 5.4.274, 5.10.215, 5.15.154, 6.1.84, 6.6.24, 6.7.12, 6.8 | Patch available | CNA |
- Linux VendorLinux Affected 5.4.262 to before 5.4.274; 5.10.198 to before 5.10.215; 5.15.134 to before 5.15.154; 6.1.56 to before 6.1.84; 6.4.11 to before 6.5 Fixed in 5.4.274, 5.10.215, 5.15.154, 6.1.84, 6.5 Patch available CNA
- Linux VendorLinux Affected 6.5 and later Fixed in 5.4.274, 5.10.215, 5.15.154, 6.1.84, 6.6.24, 6.7.12, 6.8 Patch available CNA
CPE configurations NVD · 2
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.4.274, 5.10.215, 5.15.154, 6.1.84, 6.5
- Fix · CNA Linux (Linux) Fixed in 5.4.274, 5.10.215, 5.15.154, 6.1.84, 6.6.24, 6.7.12, 6.8
Red Hat 5 advisories
- RHSA-2024:3627 Released 2024-06-05 · Red Hat rating Moderatekernel-rt security and bug fix update
- Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-553.5.1.rt7.346.el8_10, kernel-rt-core-4.18.0-553.5.1.rt7.346.el8_10, kernel-rt-debug-4.18.0-553.5.1.rt7.346.el8_10 +9
- Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-553.5.1.rt7.346.el8_10, kernel-rt-core-4.18.0-553.5.1.rt7.346.el8_10, kernel-rt-debug-4.18.0-553.5.1.rt7.346.el8_10 +7
- RHSA-2024:3618 Released 2024-06-05 · Red Hat rating Moderatekernel update
- Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.5.1.el8_10, kernel-4.18.0-553.5.1.el8_10, kernel-abi-stablelists-4.18.0-553.5.1.el8_10 +19
- Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.5.1.el8_10
- RHSA-2024:3461 Released 2024-05-29 · Red Hat rating Moderatekernel security and bug fix update
- Red Hat CodeReady Linux Builder EUS (v.9.2) kernel-tools-libs-devel-5.14.0-284.67.1.el9_2
- Red Hat Enterprise Linux AppStream EUS (v.9.2) kernel-64k-debug-devel-5.14.0-284.67.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.67.1.el9_2, kernel-64k-devel-5.14.0-284.67.1.el9_2 +9
- Red Hat Enterprise Linux BaseOS EUS (v.9.2) bpftool-7.0.0-284.67.1.el9_2, kernel-5.14.0-284.67.1.el9_2, kernel-64k-5.14.0-284.67.1.el9_2 +29
Show 2 more Red Hat advisories
- RHSA-2024:3460 Released 2024-05-29 · Red Hat rating Moderatekernel-rt security and bug fix update
- Red Hat Enterprise Linux Real Time EUS (v.9.2) kernel-rt-5.14.0-284.67.1.rt14.352.el9_2, kernel-rt-core-5.14.0-284.67.1.rt14.352.el9_2, kernel-rt-debug-5.14.0-284.67.1.rt14.352.el9_2 +9
- Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2) kernel-rt-5.14.0-284.67.1.rt14.352.el9_2, kernel-rt-core-5.14.0-284.67.1.rt14.352.el9_2, kernel-rt-debug-5.14.0-284.67.1.rt14.352.el9_2 +11
- RHSA-2024:3306 Released 2024-05-23 · Red Hat rating Moderatekernel security and bug fix update
- Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-427.18.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.18.1.el9_4, kernel-64k-devel-5.14.0-427.18.1.el9_4 +11
- Red Hat Enterprise Linux BaseOS (v. 9) bpftool-7.3.0-427.18.1.el9_4, kernel-5.14.0-427.18.1.el9_4, kernel-64k-5.14.0-427.18.1.el9_4 +29
- Red Hat Enterprise Linux CRB (v. 9) kernel-tools-libs-devel-5.14.0-427.18.1.el9_4, libperf-5.14.0-427.18.1.el9_4
- Red Hat Enterprise Linux NFV (v. 9) kernel-rt-5.14.0-427.18.1.el9_4, kernel-rt-core-5.14.0-427.18.1.el9_4, kernel-rt-debug-5.14.0-427.18.1.el9_4 +11
- Red Hat Enterprise Linux RT (v. 9) kernel-rt-5.14.0-427.18.1.el9_4, kernel-rt-core-5.14.0-427.18.1.el9_4, kernel-rt-debug-5.14.0-427.18.1.el9_4 +9
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 9 | Affected | No fix yet |
| Red Hat CodeReady Linux Builder EUS (v.9.2) | Fixed | RHSA-2024:3461 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2024:3306 |
| Red Hat Enterprise Linux AppStream EUS (v.9.2) | Fixed | RHSA-2024:3461 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2024:3618 |
| Red Hat Enterprise Linux BaseOS (v. 9) | Fixed | RHSA-2024:3306 |
| Red Hat Enterprise Linux BaseOS EUS (v.9.2) | Fixed | RHSA-2024:3461 |
| Red Hat Enterprise Linux CRB (v. 8) | Fixed | RHSA-2024:3618 |
| Red Hat Enterprise Linux CRB (v. 9) | Fixed | RHSA-2024:3306 |
| Red Hat Enterprise Linux NFV (v. 8) | Fixed | RHSA-2024:3627 |
| Red Hat Enterprise Linux NFV (v. 9) | Fixed | RHSA-2024:3306 |
| Red Hat Enterprise Linux RT (v. 8) | Fixed | RHSA-2024:3627 |
| Red Hat Enterprise Linux RT (v. 9) | Fixed | RHSA-2024:3306 |
| Red Hat Enterprise Linux Real Time EUS (v.9.2) | Fixed | RHSA-2024:3460 |
| Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2) | Fixed | RHSA-2024:3460 |
Not affected: 2 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux AppStream EUS (v.9.2)
Timeline
- 2026-10-02 Threatist record created from CVE-2024-26643
- 2026-10-03 Alias added: GHSA-ph5r-c8gc-xg6f
References
Patch 8
- https://git.kernel.org/stable/c/d75a589bb92af1abf3b779cfcd1977ca11b27033
- https://git.kernel.org/stable/c/edcf1a3f182ecf8b6b805f0ce90570ea98c5f6bf
- https://git.kernel.org/stable/c/e2d45f467096e931044f0ab7634499879d851a5c
- https://git.kernel.org/stable/c/291cca35818bd52a407bc37ab45a15816039e363
- https://git.kernel.org/stable/c/406b0241d0eb598a0b330ab20ae325537d8d8163
- https://git.kernel.org/stable/c/b2d6f9a5b1cf968f1eaa71085ceeb09c2cb276b1
- https://git.kernel.org/stable/c/5224afbc30c3ca9ba23e752f0f138729b2c48dd8
- https://git.kernel.org/stable/c/552705a3650bbf46a22b1adedc1b04181490fc36
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Sources
- CVE-2024-26643 · CVE Program
- CVE-2024-26643 · NVD
- FIRST EPSS
- GHSA-ph5r-c8gc-xg6f · GitHub Advisory Database · CC BY 4.0
- CVE-2024-26643 · Red Hat security data · CC BY 4.0
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