SUSE-SU-2026:23301-1

This update for go1.26 fixes the following issues:

Update to go1.26.6 (released 2026-08-13, bsc#1255111).

Security issues fixed:

• CVE-2026-33818: encoding/asn1: unenforced recursion limit can lead to stack exhaustion when parsing deeply-nested, recursive structures (bsc#1275034).
• CVE-2026-39821: golang.org/x/net/idna: failure to reject ASCII-only Punycode-encoded labels allows for validation bypass and privilege escalation (bsc#1266609).
• CVE-2026-56853: net/http: missing timeout when doing unencrypted HTTP/2 check can lead to a denial of service (bsc#1275028).
• CVE-2026-56858: html/template: improper Javascript regexp context tracking allows for XSS attacks (bsc#1275033).
• CVE-2026-56859: encoding/xml: missing recursion depth guard during decode operation can lead to stack exhaustion and a denial of service (bsc#1275026).
• CVE-2026-56860: net/url: quadratic time complexity in resolvePath when processing certain input can lead to high memory allocation overhead and a denial of service (bsc#1275029).
• CVE-2026-56862: crypto/tls: no limit set for handshake messages sent post-handshake allows for denial of service (bsc#1275032).
• CVE-2026-56864: x/mod/sumdb: unauthenticated hashes accepted in Lookup allows for a coordinating GOPROXY and GOSUMDB to serve a client malicious module content (bsc#1275025).
• CVE-2026-56865: x/mod/sumdb/tlog: improper transparency log tile verification allows for bypass on crafted input and can lead to malicious module content to be accepted (bsc#1275024).

Changes for go1.26.6:

• go#79876 cmd/compile: prove misscompilation in slicemask folding leaves garbage in the upper bits
• go#80099 cmd/compile: internal compiler error invalid heap allocated var without Heapaddr
• go#80131 cmd/link: peCreateExportFile generates invalid .def file when output name has trailing dot (c-shared on Windows)
• go#80365 os: Root's MkdirAll can't create paths ending in forward slashes
• go#80367 os: TestRootMultiReadFile fails on netbsd/arm64 after CL 797880
• go#80369 os: TestRootConsistencyRemoveAll fails on Plan 9 after CL 797880
• go#80394 runtime: arm64 found pointer to free object with safe code
• go#80441 runtime: uninitialized register due to wrong ABI in mach_vm_region_trampoline leads to libc following garbage stack data as a pointer
• go#80478 cmd/compile: riscv64 miscompiles struct copy, corrupting a []byte slice field
• go#80499 runtime: js/wasm: "found bad pointer in Go heap" -- link-layout-constant value recorded as a pointer in the write-barrier buffer
• go#80579 cmd/compile: regalloc uses unreliable type data (like v.Type.IsSigned()) to choose the restore of spills
• go#80606 crypto/tls: escape hatch for FIPS 140-3 mode Extended Master Secret enforcement
• go#80609 net, x/net/dns/dnsmessage: panic when parsing invalid SVCB record
• go#80615 cmd/compile: mips64le misscompile OffPtr by a const which doesn't fit 32bits resulting in panic
• go#80617 cmd/compile: mips/mips64, multiply/divide results spilled from HI/LO corrupted w/ big stack frames
• go#80619 cmd/compile: prove bug causes invalid indirect call
• go#80715 runtime: fpTracebackPartialExpand SIGSEGV under high panic load