{"id":154965,"date":"2026-01-24T23:11:55","date_gmt":"2026-01-24T21:11:55","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-standartnyh-si-bibliotek-glibc-2-43-i-newlib-4-6-0"},"modified":"2026-01-24T23:11:55","modified_gmt":"2026-01-24T21:11:55","slug":"vypusk-standartnyh-si-bibliotek-glibc-2-43-i-newlib-4-6-0","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/vypusk-standartnyh-si-bibliotek-glibc-2-43-i-newlib-4-6-0","title":{"rendered":"Vyd\u00e1n\u00ed standardn\u00edch C knihoven Glibc 2.43 a newlib 4.6.0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Po \u0161esti m\u011bs\u00edc\u00edch v\u00fdvoje byl vyd\u00e1n nov\u00fd release syst\u00e9mov\u00e9 knihovny GNU C Library 2.43 (glibc), kter\u00e1 pln\u011b vyhovuje po\u017eadavk\u016fm standard\u016f ISO C23 a POSIX.1-2024. Na vytv\u00e1\u0159en\u00ed nov\u00e9ho vyd\u00e1n\u00ed se pod\u00edlelo 69 v\u00fdvoj\u00e1\u0159\u016f.     <\/p>\n<p>Mezi implementovan\u00e1 vylep\u0161en\u00ed v Glibc 2.43 pat\u0159\u00ed:   <\/p>\n<ul>\n<li class=\"l\"> Byla p\u0159id\u00e1na experiment\u00e1ln\u00ed mo\u017enost kompilace pomoc\u00ed kompil\u00e1toru Clang, kter\u00e1 je zat\u00edm dostupn\u00e1 pouze pro platformy aarch64-linux-gnu a x86_64-linux-gnu p\u0159i pou\u017eit\u00ed runtime kompatibiln\u00edho s libgcc. K sestaven\u00ed Glibc je pot\u0159eba alespo\u0148 verze Clang 18.\n<li class=\"l\"> Pro syst\u00e9my Linux byla p\u0159id\u00e1na funkce mseal(), kter\u00e1 umo\u017e\u0148uje proces\u016fm uzamknout zm\u011bnu ur\u010dit\u00fdch \u010d\u00e1st\u00ed sv\u00e9 adresn\u00ed prostory.\n<li class=\"l\"> Pro syst\u00e9my Linux byla p\u0159id\u00e1na funkce openat2(), kter\u00e1 na rozd\u00edl od funkce openat() podporuje sadu dodate\u010dn\u00fdch p\u0159\u00edznak\u016f pro omezen\u00ed opr\u00e1vn\u011bn\u00ed k souborov\u00e9 cest\u011b (zakazuje p\u0159ekro\u010den\u00ed bod\u016f p\u0159ipojen\u00ed, symbolick\u00fdch odkaz\u016f, magick\u00fdch odkaz\u016f (\/proc\/PID\/fd) a komponent\u016fm \u201e..\/\u201c).\n<li class=\"l\"> Byly p\u0159id\u00e1ny funkce free_sized, free_aligned_sized, memset_explicit a memalignment, kter\u00e9 se objevily ve standardu C23.\n<li class=\"l\"> V souladu se standardem C23 je vol\u00e1n\u00ed assert definov\u00e1no jako makro s prom\u011bnn\u00fdm po\u010dtem argument\u016f, kter\u00e9 podporuje v\u00fdrazy s \u010d\u00e1rkou uvnit\u0159 inicializ\u00e1toru.\n<li class=\"l\"> V souladu se standardem C23 byly funkce bsearch, memchr, strchr, strpbrk, strrchr, strstr, wcschr, wcspbrk, wcsrchr, wcsstr a wmemchr, je\u017e vracej\u00ed ukazatele na vstupn\u00ed pole, p\u0159eps\u00e1ny jako makra, kter\u00e1 vracej\u00ed ukazatel na typ s kvalifik\u00e1torem \u201econst\u201c, pokud je vstupn\u00edm argumentem ukazatel na typ s kvalifik\u00e1torem \u201econst\u201c.\n<li class=\"l\"> Do hlavi\u010dkov\u00e9ho souboru math.h byly p\u0159id\u00e1ny definice typ\u016f long_double_t, _Float32_t, _Float64_t a _Float128_t, kter\u00e9 se objevily ve standardu C23.\n<li class=\"l\"> Byly p\u0159id\u00e1ny voliteln\u00e9 re\u017eimy v\u00fdpo\u010dtu \u010dasu TIME_MONOTONIC (stabiln\u011b se zvy\u0161uj\u00edc\u00ed \u010das, nez\u00e1visl\u00fd na zm\u011bn\u00e1ch syst\u00e9mov\u00fdch hodin), TIME_ACTIVE a TIME_THREAD_ACTIVE (\u010das aktivn\u00edho prov\u00e1d\u011bn\u00ed procesu nebo vl\u00e1kna) pro pou\u017eit\u00ed v funkci timespec_get.\n<li class=\"l\"> Z projektu CORE-MATH byly p\u0159eneseny optimalizovan\u00e9 varianty matematick\u00fdch funkc\u00ed acosh, asinh, atanh, erf, erfc, lgamma a tgamma.\n<li class=\"l\"> Byly p\u0159id\u00e1ny optimalizovan\u00e9 implementace funkc\u00ed fma, fmaf, remainder, remaindef, frexpf, frexp, frexpl (binary128) a frexpl (intel96).\n<li class=\"l\"> Byla zv\u00fd\u0161ena v\u00fdkonnost matematick\u00fdch funkc\u00ed acosf, acoshf, asinhf, atan2f, atanhf, coshf, fmodf, lgammaf\/lgammaf_r, log10f, remainderf, sinhf, sqrtf, tgammaf, y0\/j0, y1\/j1 a yn\/jn d\u00edky odstran\u011bn\u00ed k\u00f3du pro zpracov\u00e1n\u00ed chyb SVID (vol\u00e1n\u00ed u\u017eivatelsk\u00e9 funkce matherr p\u0159i chyb\u011b) pro nov\u00e9 sestaven\u00ed (pro zachov\u00e1n\u00ed kompatibility se ji\u017e zkompilovan\u00fdmi programy byly ponech\u00e1ny v re\u017eimu compat).\n<li class=\"l\"> Na syst\u00e9mech x86 byla p\u0159id\u00e1na podpora procesor\u016f Intel Nova Lake a Wildcat Lake.\n<li class=\"l\"> Na syst\u00e9mech AArch64 je ve funkci malloc standardn\u011b povolena podpora velk\u00fdch pam\u011b\u0165ov\u00fdch str\u00e1nek (transparent huge pages) o velikosti 2MB (nastaven\u00ed ibc.malloc.hugetlb je nyn\u00ed nastaveno na 1). Ve funkci clone() bylo implementov\u00e1no vypnut\u00ed stavu ZA (Z-Array) na CPU s podporou roz\u0161\u00ed\u0159en\u00ed SME (Scalable Matrix Extension).\n<li class=\"l\"> Pro syst\u00e9my AArch64, kter\u00e9 podporuj\u00ed roz\u0161\u00ed\u0159en\u00ed BTI (Branch Target Identification), byla p\u0159id\u00e1na konfigurace glibc.cpu.aarch64_bti, kter\u00e1 umo\u017e\u0148uje vynucen\u00e9 aktivaci BTI pro v\u0161echny spustiteln\u00e9 soubory a knihovny. BTI zaji\u0161\u0165uje blokov\u00e1n\u00ed p\u0159echod\u016f na libovoln\u00e9 \u010d\u00e1sti k\u00f3du, aby se zabr\u00e1nilo vytv\u00e1\u0159en\u00ed gadget\u016f v exploitech, kter\u00e9 vyu\u017e\u00edvaj\u00ed techniky orientovan\u00e9 na n\u00e1vrat.\n<li class=\"l\"> Na syst\u00e9mech AArch64, kter\u00e9 podporuj\u00ed jedno z roz\u0161\u00ed\u0159en\u00ed pro ochranu v\u011btven\u00ed (Branch Target Identification nebo Guarded Control Stack), je povoleno pou\u017eit\u00ed prom\u011bnn\u00e9 prost\u0159ed\u00ed \u201eLD_DEBUG=security\u201c pro v\u00fdstup varov\u00e1n\u00ed linkeru p\u0159i na\u010d\u00edt\u00e1n\u00ed spustiteln\u00fdch soubor\u016f a knihoven, kter\u00e9 tato roz\u0161\u00ed\u0159en\u00ed nepodporuj\u00ed.\n<li class=\"l\"> Pro syst\u00e9my AArch64 byly p\u0159id\u00e1ny vektorov\u00e9 varianty funkc\u00ed exp2m1, exp10m1, log10p1, log2p1 a rsqrt.\n<li class=\"l\"> Pro architekturu RISC-V byla p\u0159id\u00e1na optimalizovan\u00e1 implementace funkce memset, kter\u00e1 vyu\u017e\u00edv\u00e1 roz\u0161\u00ed\u0159en\u00ed RVV (RISC-V Vector).\n<li class=\"l\"> V testovac\u00edm souboru byla v\u00fdznamn\u011b roz\u0161\u00ed\u0159ena kontrola v\u00edcerozm\u011brnosti a funkc\u00ed scanf, strerror a strsignal.\n<li class=\"l\"> Data k\u00f3dov\u00e1n\u00ed, informace o typech znak\u016f a tabulky transliterace byly aktualizov\u00e1ny na podporu specifikace Unicode 17.0.0.\n<li class=\"l\"> V implementaci funkce LD_PROFILE bylo ukon\u010deno pou\u017e\u00edv\u00e1n\u00ed v\u00fdchoz\u00edho adres\u00e1\u0159e (\/var\/tmp) pro ukl\u00e1d\u00e1n\u00ed dat profilu. Pro uchov\u00e1n\u00ed t\u011bchto dat je nyn\u00ed vy\u017eadov\u00e1no explicitn\u00ed ur\u010den\u00ed adres\u00e1\u0159e prost\u0159ednictv\u00edm prom\u011bnn\u00e9 prost\u0159ed\u00ed LD_PROFILE_OUTPUT.\n<li class=\"l\"> Opraveny zranitelnosti:\n<ul>\n<li class=\"l\"> CVE-2026-0861 \u2014 celo\u010d\u00edseln\u00e9 p\u0159ete\u010den\u00ed ve funkci memalign, vedouc\u00ed k po\u0161kozen\u00ed haldy.\n<li class=\"l\"> CVE-2026-0915 \u2014 \u00fanik obsahu z\u00e1sobn\u00edku ve funkc\u00edch getnetbyaddr a getnetbyaddr_r.\n<li class=\"l\"> CVE-2025-15281 \u2014 vracen\u00ed neinitializovan\u00e9 pam\u011bti, kter\u00e1 m\u016f\u017ee obsahovat zbytkov\u00e1 data, p\u0159i pou\u017eit\u00ed funkce wordexp s parametry WRDE_REUSE a WRDE_APPEND.      <\/ul>\n<\/ul>\n<p>Krom\u011b toho, po roce v\u00fdvoje projekt Cygwin publikoval vyd\u00e1n\u00ed standardn\u00ed knihovny C newlib 4.6.0, rozv\u00edjen\u00e9 in\u017een\u00fdry z firmy Red Hat. Knihovna se zam\u011b\u0159uje na poskytnut\u00ed kompaktn\u00ed implementace standardn\u00ed knihovny C (libc), vhodn\u00e9 pro pou\u017eit\u00ed na vestav\u011bn\u00fdch syst\u00e9mech s mal\u00fdm mno\u017estv\u00edm trval\u00e9ho \u00falo\u017ei\u0161t\u011b a opera\u010dn\u00ed pam\u011bti. K\u00f3d projektu je naps\u00e1n v jazyce C a je distribuov\u00e1n pod licenc\u00ed LGPLv2.      <\/p>\n<p> V nov\u00e9 verzi newlib:  <\/p>\n<ul>\n<li class=\"l\"> Byla roz\u0161\u00ed\u0159ena podpora specifikace POSIX.1-2024.\n<li class=\"l\"> Byl zv\u00fd\u0161en v\u00fdkon funkc\u00ed memcpy, mempcpy a memmove.\n<li class=\"l\"> Byla p\u0159id\u00e1na mo\u017enost \u201e--enable-newlib-hw-misaligned-access\u201c.\n<li class=\"l\"> Byla optimalizov\u00e1na architektura RISC-V pro funkce s\u00e9rie mem* a str*.\n<li class=\"l\"> Byl p\u0159epracov\u00e1n k\u00f3d zpracov\u00e1n\u00ed lokalizac\u00ed, kter\u00fd je zbaven glob\u00e1ln\u00ed prom\u011bnn\u00e9 global_locale_string ve prosp\u011bch jednotliv\u00fdch prom\u011bnn\u00fdch locale_string pro ka\u017ed\u00fd objekt lokalizace typu locale_t.\n<li class=\"l\"> Byla p\u0159id\u00e1na podpora nov\u00e9 platformy m68k-atari-elf.\n<li class=\"l\"> Z knihovny FreeBSD gdtoa byl p\u0159enesen k\u00f3d strtorQ.c, kter\u00fd se pou\u017e\u00edv\u00e1 pro implementaci podpory 128bitov\u00e9ho typu \u201elong double\u201c ve funkci strtold.\n<li class=\"l\"> Data k\u00f3dov\u00e1n\u00ed byla aktualizov\u00e1na na Unicode 17.0.    <\/ul>\n<p>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=64670\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u043e\u0441\u043b\u0435 \u0448\u0435\u0441\u0442\u0438 \u043c\u0435\u0441\u044f\u0446\u0435\u0432 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0440\u0435\u043b\u0438\u0437 \u0441\u0438\u0441\u0442\u0435\u043c\u043d\u043e\u0439 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 GNU C Library 2.43 (glibc), \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043f\u043e\u043b\u043d\u043e\u0441\u0442\u044c\u044e \u0441\u043b\u0435\u0434\u0443\u0435\u0442 \u0442\u0440\u0435\u0431\u043e\u0432\u0430\u043d\u0438\u044f\u043c \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u043e\u0432 ISO C23 \u0438 POSIX.1-2024. \u0412 \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u0438 \u043d\u043e\u0432\u043e\u0433\u043e \u0432\u044b\u043f\u0443\u0441\u043a\u0430 \u043f\u0440\u0438\u043d\u044f\u043b\u0438 \u0443\u0447\u0430\u0441\u0442\u0438\u0435 69 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432. \u0418\u0437 \u0440\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u0432 Glibc 2.43 \u0443\u043b\u0443\u0447\u0448\u0435\u043d\u0438\u0439 \u043c\u043e\u0436\u043d\u043e \u043e\u0442\u043c\u0435\u0442\u0438\u0442\u044c: \u0414\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u0430 \u044d\u043a\u0441\u043f\u0435\u0440\u0438\u043c\u0435\u043d\u0442\u0430\u043b\u044c\u043d\u0430\u044f \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u0441\u0431\u043e\u0440\u043a\u0438 \u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0442\u043e\u0440\u043e\u043c Clang, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043f\u043e\u043a\u0430 \u0434\u043e\u0441\u0442\u0443\u043f\u043d\u0430 \u0442\u043e\u043b\u044c\u043a\u043e \u0434\u043b\u044f \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c aarch64-linux-gnu \u0438 x86_64-linux-gnu \u043f\u0440\u0438 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0438 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-154965","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" 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