SUSE-SU-2026:1858-1
Vulnerability from csaf_suse - Published: 2026-05-14 13:34 - Updated: 2026-05-14 13:34Summary
Security update for the Linux Kernel RT (Live Patch 4 for SUSE Linux Enterprise 15 SP7)
Severity
Important
Notes
Title of the patch: Security update for the Linux Kernel RT (Live Patch 4 for SUSE Linux Enterprise 15 SP7)
Description of the patch:
This update for the SUSE Linux Enterprise Kernel 6.4.0-150700.7.16 fixes one security issue
The following security issue was fixed:
- CVE-2026-43284: xfrm: esp: avoid in-place decrypt on shared skb frags (bsc#1264459).
Patchnames: SUSE-2026-1858,SUSE-SLE-Module-Live-Patching-15-SP7-2026-1847
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
8.8 (High)
Affected products
Recommended
1 product
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_7_16-rt-11-150700.2.1.x86_64 | — |
Vendor Fix
|
Threats
Impact
important
References
9 references
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"text": "\nThis update for the SUSE Linux Enterprise Kernel 6.4.0-150700.7.16 fixes one security issue\n\nThe following security issue was fixed:\n\n- CVE-2026-43284: xfrm: esp: avoid in-place decrypt on shared skb frags (bsc#1264459).\n",
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{
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"summary": "E-Mail link for SUSE-SU-2026:1858-1",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-May/026028.html"
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{
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"summary": "SUSE Bug 1264459",
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"title": "Security update for the Linux Kernel RT (Live Patch 4 for SUSE Linux Enterprise 15 SP7)",
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"vulnerabilities": [
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"notes": [
{
"category": "general",
"text": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: esp: avoid in-place decrypt on shared skb frags\n\nMSG_SPLICE_PAGES can attach pages from a pipe directly to an skb. TCP\nmarks such skbs with SKBFL_SHARED_FRAG after skb_splice_from_iter(),\nso later paths that may modify packet data can first make a private\ncopy. The IPv4/IPv6 datagram append paths did not set this flag when\nsplicing pages into UDP skbs.\n\nThat leaves an ESP-in-UDP packet made from shared pipe pages looking\nlike an ordinary uncloned nonlinear skb. ESP input then takes the no-COW\nfast path for uncloned skbs without a frag_list and decrypts in place\nover data that is not owned privately by the skb.\n\nMark IPv4/IPv6 datagram splice frags with SKBFL_SHARED_FRAG, matching\nTCP. Also make ESP input fall back to skb_cow_data() when the flag is\npresent, so ESP does not decrypt externally backed frags in place.\nPrivate nonlinear skb frags still use the existing fast path.\n\nThis intentionally does not change ESP output. In esp_output_head(),\nthe path that appends the ESP trailer to existing skb tailroom without\ncalling skb_cow_data() is not reachable for nonlinear skbs:\nskb_tailroom() returns zero when skb-\u003edata_len is nonzero, while ESP\ntailen is positive. Thus ESP output will either use the separate\ndestination-frag path or fall back to skb_cow_data().",
"title": "CVE description"
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"url": "https://bugzilla.suse.com/1264449"
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"url": "https://bugzilla.suse.com/1264459"
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"scores": [
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"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
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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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