Answer in brief
CVE-2026-72253 records a Unknown severity vulnerability in netfilter: nf_conntrack_sip: validate skb_dst() before accessing it. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=cae3a2627520c3795b54533c5328b77af3405dbe <e64a48c50a1ff565a98c6a98d82b5b942868e76e || >=cae3a2627520c3795b54533c5328b77af3405dbe <c199ed687c00841daf60e9d131976958583a8c09 || >=cae3a2627520c3795b54533c5328b77af3405dbe <09755dc62b026076b1d47f83489eb0547c8135e0 || >=cae3a2627520c3795b54533c5328b77af3405dbe <b843a96252f672332837ea2ecb7c8db0acf68e20 || >=cae3a2627520c3795b54533c5328b77af3405dbe <e5e24a365a5e024efef63cc49abb345fbd4852c5 | e64a48c50a1ff565a98c6a98d82b5b942868e76e, c199ed687c00841daf60e9d131976958583a8c09, 09755dc62b026076b1d47f83489eb0547c8135e0, b843a96252f672332837ea2ecb7c8db0acf68e20, e5e24a365a5e024efef63cc49abb345fbd4852c5 |
| Linux/Linuxgeneric | 4.3 | Not reported |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_sip: validate skb_dst() before accessing it tc ingress and openvswitch do not guarantee routing information to be available. These subsystems use the conntrack helper infrastructure, and the SIP helper relies on the skb_dst() to be present if sip_external_media is set to 1 (which is disabled by default as a module parameter). This effectively disables the sip_external_media toggle for these subsystems without resulting in a crash.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-72253 records a Unknown severity vulnerability in netfilter: nf_conntrack_sip: validate skb_dst() before accessing it. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=cae3a2627520c3795b54533c5328b77af3405dbe <e64a48c50a1ff565a98c6a98d82b5b942868e76e || >=cae3a2627520c3795b54533c5328b77af3405dbe <c199ed687c00841daf60e9d131976958583a8c09 || >=cae3a2627520c3795b54533c5328b77af3405dbe <09755dc62b026076b1d47f83489eb0547c8135e0 || >=cae3a2627520c3795b54533c5328b77af3405dbe <b843a96252f672332837ea2ecb7c8db0acf68e20 || >=cae3a2627520c3795b54533c5328b77af3405dbe <e5e24a365a5e024efef63cc49abb345fbd4852c5 | e64a48c50a1ff565a98c6a98d82b5b942868e76e, c199ed687c00841daf60e9d131976958583a8c09, 09755dc62b026076b1d47f83489eb0547c8135e0, b843a96252f672332837ea2ecb7c8db0acf68e20, e5e24a365a5e024efef63cc49abb345fbd4852c5 |
| Linux/Linuxgeneric | 4.3 | Not reported |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_sip: validate skb_dst() before accessing it tc ingress and openvswitch do not guarantee routing information to be available. These subsystems use the conntrack helper infrastructure, and the SIP helper relies on the skb_dst() to be present if sip_external_media is set to 1 (which is disabled by default as a module parameter). This effectively disables the sip_external_media toggle for these subsystems without resulting in a crash.
Quoted source text, attributed separately from HOL analysis.