CVE-2026-43098
Description
In the Linux kernel, the following vulnerability has been resolved:
nfc: s3fwrn5: allocate rx skb before consuming bytes
s3fwrn82_uart_read() reports the number of accepted bytes to the serdev core. The current code consumes bytes into recv_skb and may already deliver a complete frame before allocating a fresh receive buffer.
If that alloc_skb() fails, the callback returns 0 even though it has already consumed bytes, and it leaves recv_skb as NULL for the next receive callback. That breaks the receive_buf() accounting contract and can also lead to a NULL dereference on the next skb_put_u8().
Allocate the receive skb lazily before consuming the next byte instead. If allocation fails, return the number of bytes already accepted.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
15cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 8 more
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=5.11,<6.6.136
- cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*
- (no CPE)
- osv-coords6 versionspkg:apk/chainguard/linux-aws-6.18pkg:apk/chainguard/linux-azure-6.18pkg:apk/chainguard/linux-gcp-6.18pkg:apk/chainguard/linux-qemu-6.18pkg:apk/chainguard/linux-qemu-6.18-bootc-boot-installedpkg:apk/chainguard/linux-vmware-6.18
< 6.18.31-r0+ 5 more
- (no CPE)range: < 6.18.31-r0
- (no CPE)range: < 6.18.31-r0
- (no CPE)range: < 6.18.31-r0
- (no CPE)range: < 6.18.31-r0
- (no CPE)range: < 6.18.31-r0
- (no CPE)range: < 6.18.31-r0
Patches
Vulnerability mechanics
References
7- git.kernel.org/stable/c/09822d3d6f68a0cdc4626e0c507324a4927f55a9nvdPatch
- git.kernel.org/stable/c/5c14a19d5b1645cce1cb1252833d70b23635b632nvdPatch
- git.kernel.org/stable/c/6d931680a9851481c3243689488eafed08eeff71nvdPatch
- git.kernel.org/stable/c/7c31f7a599cf00fad3c204092a91a924126c67e4nvdPatch
- git.kernel.org/stable/c/d8c2aa3c4a1ec530a485e46a1c4f1a118bb00156nvdPatch
- git.kernel.org/stable/c/20a57de2e79b797ed75382659d52bf4c7d9cb446nvd
- git.kernel.org/stable/c/e4ab0fd1c91882f2a7846b1817781c8741f7f315nvd
News mentions
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