CVE-2026-45998 (GCVE-0-2026-45998)
Vulnerability from cvelistv5 – Published: 2026-05-27 12:55 – Updated: 2026-09-16 12:04
VLAI
EPSS
VEX
Title
rxrpc: Fix potential UAF after skb_unshare() failure
Summary
In the Linux kernel, the following vulnerability has been resolved:
rxrpc: Fix potential UAF after skb_unshare() failure
If skb_unshare() fails to unshare a packet due to allocation failure in
rxrpc_input_packet(), the skb pointer in the parent (rxrpc_io_thread())
will be NULL'd out. This will likely cause the call to
trace_rxrpc_rx_done() to oops.
Fix this by moving the unsharing down to where rxrpc_input_call_event()
calls rxrpc_input_call_packet(). There are a number of places prior to
that where we ignore DATA packets for a variety of reasons (such as the
call already being complete) for which an unshare is then avoided.
And with that, rxrpc_input_packet() doesn't need to take a pointer to the
pointer to the packet, so change that to just a pointer.
Severity
CWE
- CWE-825 - Expired Pointer Dereference
Assigner
References
14 references
| URL | Tags |
|---|---|
| https://git.kernel.org/stable/c/e3bf143b1e98fb3d6… | |
| https://git.kernel.org/stable/c/bf20f46d94f1db38e… | |
| https://git.kernel.org/stable/c/996b0487b3cdda4c9… | |
| https://git.kernel.org/stable/c/8fde6296c4d4da2be… | |
| https://git.kernel.org/stable/c/1f2740150f904bfa6… | |
| https://access.redhat.com/security/cve/CVE-2026-45998 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2482024 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:55445 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:34911 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:67723 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:65712 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:65708 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:67721 | vendor-advisoryx_refsource_REDHAT |
Impacted products
12 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
2d1faf7a0ca3c0b327cf064c80e4e775532c9319 , < e3bf143b1e98fb3d6d9e6825bcd683974d478e8c
(git)
Affected: 2d1faf7a0ca3c0b327cf064c80e4e775532c9319 , < bf20f46d94f1db38e6ffc0ca204a5fe0de01b495 (git) Affected: 2d1faf7a0ca3c0b327cf064c80e4e775532c9319 , < 996b0487b3cdda4c91811dbb1c9564626bc840bd (git) Affected: 2d1faf7a0ca3c0b327cf064c80e4e775532c9319 , < 8fde6296c4d4da2be7ab761305ab7f232b94eefd (git) Affected: 2d1faf7a0ca3c0b327cf064c80e4e775532c9319 , < 1f2740150f904bfa60e4bad74d65add3ccb5e7f8 (git) |
|
| Linux | Linux |
Affected:
6.2
Unaffected: 0 , < 6.2 (semver) Unaffected: 6.6.140 , ≤ 6.6.* (semver) Unaffected: 6.12.86 , ≤ 6.12.* (semver) Unaffected: 6.18.27 , ≤ 6.18.* (semver) Unaffected: 7.0.4 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:6.12.0-211.30.1.el10_2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support |
Unaffected:
0:6.12.0-55.98.1.el10_0 , < *
(rpm)
cpe:/o:redhat:enterprise_linux_eus:10.0 |
|
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions |
Unaffected:
0:5.14.0-284.191.1.el9_2 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:9.2 |
|
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions |
Unaffected:
0:5.14.0-284.191.1.rt14.476.el9_2 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:9.2::nfv |
|
| Red Hat | Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions |
Unaffected:
0:5.14.0-427.149.1.el9_4 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:9.4 |
|
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support |
Unaffected:
0:5.14.0-570.140.1.el9_6 , < *
(rpm)
cpe:/a:redhat:rhel_eus:9.6 |
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat Enterprise Linux 8 |
cpe:/o:redhat:enterprise_linux:8
|
|
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/o:redhat:enterprise_linux:9
|
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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