ipv6: sr: fix missing sk_buff release in seg6_input_core
In the Linux kernel, the following vulnerability has been resolved: ipv6: sr: fix missing sk_buff release in seg6_input_core The seg6_input() function is responsible for adding the SRH into a packet, delegating the operation to the seg6_input_core(). This function uses the skb_cow_head() to ensure that there is sufficient headroom in the sk_buff for accommodating the link-layer header. In the event that the skb_cow_header() function fails, the seg6_input_core() catches the error but it does not release the sk_buff, which will result in a memory leak. This issue was introduced in commit af3b5158b89d ("ipv6: sr: fix BUG due to headroom too small after SRH push") and persists even after commit 7a3f5b0de364 ("netfilter: add netfilter hooks to SRv6 data plane"), where the entire seg6_input() code was refactored to deal with netfilter hooks. The proposed patch addresses the identified memory leak by requiring the seg6_input_core() function to release the sk_buff in the event that skb_cow_head() fails.
Noroxi analysis
No Noroxi analysis for this record yet
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We use this product, ask for help- Published
- Jul 10, 2024
- Updated
- Jun 17, 2026
- EPSS
- 0.2% · 12th percentile
- CWE
- CWE-401
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Report tools
Action score
24
Monitor
Low priority for now.
- CVSS
- 24 / 40 · 6.2 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.2%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| linux | linux kernel | cpe:2.3:o:linux:linux_kernel |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- linux linux kernel4.12 and later · before 5.15.161
- linux linux kernel5.16 and later · before 6.1.93
- linux linux kernel6.2 and later · before 6.6.33
- linux linux kernel6.7 and later · before 6.9.4
Versions reported by the vendor
Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.
Linux Linux
- 4.12affected
- af3b5158b89d3bab9be881113417558c71b71ca4 and later · before e8688218e38111ace457509d8f0cad75f79c1a7aaffected · git
- af3b5158b89d3bab9be881113417558c71b71ca4 and later · before 8f1fc3b86eaea70be6abcae2e9aa7e7b99453864affected · git
- af3b5158b89d3bab9be881113417558c71b71ca4 and later · before f4df8c7670a73752201cbde215254598efdf6ce8affected · git
- af3b5158b89d3bab9be881113417558c71b71ca4 and later · before f5fec1588642e415a3d72e02140160661b303940affected · git
- af3b5158b89d3bab9be881113417558c71b71ca4 and later · before 5447f9708d9e4c17a647b16a9cb29e9e02820bd9affected · git
- before 4.12not affected · semver
- 5.15.161 and later · up to and including 5.15.*not affected · semver
- 6.1.93 and later · up to and including 6.1.*not affected · semver
- 6.6.33 and later · up to and including 6.6.*not affected · semver
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | linux | before 6.1.94-1 | 6.1.94-1 |
| Debian:13 | linux | before 6.9.7-1 | 6.9.7-1 |
Same product
linux: all recordsOther highest-scoring records for the same primary product.
- CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV89Now
- CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV85Now
- CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV83Now
- CVE-2019-13272In the Linux kernel before 5.1.17, ptrace_link in kernel/ptrace.c mishandles the recording of the credentials of a process that wants to creKEV77This week
- CVE-2013-6282The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the v6k and v7 ARM platforms do not validate certain addKEV77This week
- CVE-2013-2094The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9 uses an incorrect integer data type, which allows loKEV77This week
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Linux Linux | 5447f9708d9e4c17a647b16a9cb29e9e02820bd9 | Vendor (CNA) |
| Linux Linux | 8f1fc3b86eaea70be6abcae2e9aa7e7b99453864 | Vendor (CNA) |
| Linux Linux | e8688218e38111ace457509d8f0cad75f79c1a7a | Vendor (CNA) |
| Linux Linux | f4df8c7670a73752201cbde215254598efdf6ce8 | Vendor (CNA) |
| Linux Linux | f5fec1588642e415a3d72e02140160661b303940 | Vendor (CNA) |
| debian:linux | 6.1.94-1 · Debian:12 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Someone with local access to the system can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- none
- Availability
- none
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- None
- Availability impact
- None
Weakness class (CWE)
CWE-401 · Missing Release of Memory after Effective LifetimeCVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
nvd-secondary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- git.kernel.org/stable/c/5447f9708d9e4c17a647b16a9cb29e9e02820bd9
- git.kernel.org/stable/c/8f1fc3b86eaea70be6abcae2e9aa7e7b99453864
- git.kernel.org/stable/c/e8688218e38111ace457509d8f0cad75f79c1a7a
- git.kernel.org/stable/c/f4df8c7670a73752201cbde215254598efdf6ce8
- git.kernel.org/stable/c/f5fec1588642e415a3d72e02140160661b303940
Vendor advisories and official records. Exploit/PoC links are deliberately left out.